Malicious PDF — malware analysis report

Static analysis result for SHA-256 df64ccf70c50b4b9…

MALICIOUS

PDF

118.1 KB Created: 2021-06-06 14:58:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: af27710a4338a2e977732c2272957e92 SHA-1: 983d075259d814f4002fa12d87ca134ad2a04d11 SHA-256: df64ccf70c50b4b91c7e7265cb5c1c0e6d253b8e3e93a4f13fccafa48f55e157
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://wastran.ru/pbw?utm_term=current+affairs+2019+pdf+free+download+in+kannada PDF link annotation
    • https://xalojuxovev.weebly.com/uploads/1/3/0/7/130774978/a4ee9197e.pdfIn PDF document text
    • https://dufanidozit.weebly.com/uploads/1/3/4/7/134764520/7630939.pdfIn PDF document text
    • https://jalusuduzewot.weebly.com/uploads/1/3/1/4/131456012/vuzegoposet-birawojegoj.pdfIn PDF document text
    • https://babivefe.weebly.com/uploads/1/3/5/3/135312435/bulov_worumajopumugo_nifafurenopuve_mojajekamupetig.pdfIn PDF document text
    • https://wapexuji.weebly.com/uploads/1/3/5/3/135329723/356dd061ba5d.pdfIn PDF document text
    • https://pilitopamazi.weebly.com/uploads/1/3/4/3/134313639/fafetometaza-vowagamefub-vamuxavib-dibitezuvulota.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/bc3bbdab-6d58-42ca-88f0-ce0ed0704647/learn_lean_six_sigma_online.pdfIn PDF document text
    • http://najajadux.pbworks.com/w/file/fetch/144719100/first_aid_2018_changes.pdfIn PDF document text
    • http://nowefuro.pbworks.com/f/hamilton_beach_flexbrew_needle_error_message.pdfIn PDF document text
    • http://mujefapufefi.pbworks.com/w/file/fetch/144522507/how_to_change_tp_link_tl-wr841n_wifi_router_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4485094-d2b9-4b68-a0c3-c4eda88490f0/sony_handycam_carl_zeiss_vario_tessar_dcr-dvd105.pdfIn PDF document text
    • http://refarumiba.pbworks.com/f/asphalt_xtreme_rally_racing_hack_mod_apk.pdfIn PDF document text
    • http://dawijunegolo.pbworks.com/f/43312527038.pdfIn PDF document text
    • http://zikupuzajix.pbworks.com/f/zubixumurugap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25a24a86-a80b-43f6-883a-cbd0adc8c325/how_to_open_lexus_es_350_trunk_with_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5566f6b-56df-49b0-b191-c93beaf26753/how_to_get_faster_at_sweep_picking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fa17435-1084-4b70-b85d-5525a493d3b0/kriya_yoga_centre_in_chennai.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016c6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C6B 5580 bytes
SHA-256: 19b30baef8b6a8f616fb871725ef5d9328578c199652f2ae3970793c8b09f421
font_01_sfnt_off00017f85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F85 12308 bytes
SHA-256: 103e5a10513e9663dfa045a5f536fc73dc8ddc4195ad8df34d00378ac6e080e3
font_02_sfnt_off0001a6fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A6FA 16092 bytes
SHA-256: 4b441578987931e3d7a3d9f58de42cc39f3203463576faf1f0f9af5fbf93127d
font_03_sfnt_off0001bbb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BBB8 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176