Malicious PDF — malware analysis report

Static analysis result for SHA-256 39e9de41c82257f8…

MALICIOUS

PDF

82.6 KB Created: 2021-05-21 00:47:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: bb004a21479bd97ebbfd83e905c825fc SHA-1: 3cae1f02e5bab5e7eddfc49d7b7408876ed627b7 SHA-256: 39e9de41c82257f832aac47eadc9b8678700560f259cb6c9dacf1c15fa7619c1
392 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is identified as malicious by multiple heuristics, including critical detections for malicious redirector links and brand impersonation for credential phishing. It impersonates iCloud and directs users to a malicious URL, likely to harvest credentials or MFA codes. The document also contains a large number of links to other PDFs hosted on disposable domains, suggesting a link farm used for SEO poisoning or distributing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 10

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://sosojisizavawov.weebly.com/uploads/1/3/1/4/131454692/6026787.pdf.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://dafemum.ru/strik?utm_term=how+to+hard+reset+iphone+without+computer In PDF document text
    • https://sosojisizavawov.weebly.com/uploads/1/3/1/4/131454692/6026787.pdfIn PDF document text
    • https://zufavaxevonek.weebly.com/uploads/1/3/0/9/130969036/witozamofid.pdfIn PDF document text
    • https://lipijubirenazob.weebly.com/uploads/1/3/4/7/134722159/c338c.pdfIn PDF document text
    • https://xadifopelizil.weebly.com/uploads/1/3/4/7/134771643/4905410.pdfIn PDF document text
    • https://pazisurezufil.weebly.com/uploads/1/3/4/5/134594691/bubonapex.pdfIn PDF document text
    • https://fibimijisu.weebly.com/uploads/1/3/4/4/134461798/7530077.pdfIn PDF document text
    • https://nanewibogexuro.weebly.com/uploads/1/3/1/3/131382113/boxov.pdfIn PDF document text
    • https://zexejofamimow.weebly.com/uploads/1/3/1/4/131438337/lawozinuwibow_ragojotumorito.pdfIn PDF document text
    • https://dutajidadu.weebly.com/uploads/1/3/4/7/134730474/tulufuwo_levakodumaje.pdfIn PDF document text
    • https://lelopotive.weebly.com/uploads/1/3/0/7/130738546/4139721.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e36f4790-33d6-4f55-a61e-e90c96837997/hawaiian_shaved_ice_machine_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/exchange_2007_public_folder_size_report.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/govusoxesito.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98bc73ed-b265-4eb6-8c10-1f2df2d13260/vozafodusipagixogaxabok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/348c2cc1-62ca-4c87-8b6e-a7118841108d/soundcraft_ui_app_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cc15b2b-c677-4d7b-8959-bd5b05315523/sagikofagetepoduxiz.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/shell_script_example_run_commands_sequentially.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2704fa35-96a3-41f0-9ae6-257f25925bcd/zitupaxeranazotadifuka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebc273d2-c621-453f-a229-6561549dd621/16695289210.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c47170d5-3d87-4633-be13-1ba5a9904a5a/nursing_care_plan_nanda_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9297c48d-c5cb-4ae0-a06c-2f2310664d11/is_emdr_training_worth_it.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8963e9d2-9b98-4bc3-896f-72e81f1b45b5/how_to_use_rug_doctor_carpet_cleaner_from_home_depot.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/zoruxanafurofugutusivanin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c74548a-6051-444a-ac54-0c6764b02980/gasikepuwawewoga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97fea702-4a45-4ea8-a1a9-1433fbab6c11/gnostic_gospels_list.pdfIn PDF document text
    • https://s3.amazonaws.com/wemofodi/sirekepape.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f52b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52B 5216 bytes
SHA-256: 30a95d6fd11f2d8ba319fae65e84165ae1dcddd2936858616bcdea05d2d11651
font_01_sfnt_off000106c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C7 11576 bytes
SHA-256: ce2a29bd878ea450cbf9da93dd17276e556cd186c091dfa20c46de1e3c5204e9
font_02_sfnt_off00012c74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C74 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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