Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc8d12e0347b5d3d…

MALICIOUS

PDF

81.1 KB Created: 2021-05-18 15:56:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 28c013c33237cf8e4709936f71f3557e SHA-1: 25eca3512cc6e2e77df7f5a59fdf46baf9da6a4d SHA-256: cc8d12e0347b5d3d555e9915beffb470bbc953c540f880c363dca6540e2592da
252 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to disposable hosting and redirector infrastructure, indicating a link farm designed for malicious purposes. The presence of a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK and ClamAV detection further supports its malicious nature. The document body, though heavily obfuscated, appears to be a lure related to a search query, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://yafferge.ru/strik?utm_term=why+is+my+dyson+stick+blinking+red In PDF document text
    • https://dulowufokupi.weebly.com/uploads/1/3/4/4/134495444/demoguguset.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449411/normal_606024d3f3921.pdfIn PDF document text
    • https://fepobewute.weebly.com/uploads/1/3/5/3/135386667/d454d1.pdfIn PDF document text
    • https://fotejisatowonu.weebly.com/uploads/1/3/2/3/132302873/tuvot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401985/normal_6000f3e0d15fd.pdfIn PDF document text
    • https://nadagedo.weebly.com/uploads/1/3/1/8/131858166/fabiko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476567/normal_5fdb109f7db78.pdfIn PDF document text
    • https://nobujowufovipi.weebly.com/uploads/1/3/4/6/134636268/5162865.pdfIn PDF document text
    • https://rusijarumeza.weebly.com/uploads/1/3/1/8/131871651/segitetaseladexekev.pdfIn PDF document text
    • https://jumozavuna.weebly.com/uploads/1/3/4/5/134598597/605d7a69a25.pdfIn PDF document text
    • https://mawosamaretezij.weebly.com/uploads/1/3/4/8/134860838/15b3cf92e97ee9.pdfIn PDF document text
    • https://nurosamemozixa.weebly.com/uploads/1/3/4/3/134375837/rovate_zoboresanepono.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/ip_address_information.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a6c33f2-36fd-4e5f-b8f5-3e7f1ce3e195/what_does_the_phrase_sunshine_in_my_pocket_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9efd99c9-5cf3-4c81-9e01-bd9c36c399bb/90602481968.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/phrasal_verbs_worksheet_esl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4870c450-433c-4172-bafb-a8827591a4fb/19495584978.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f08ab0db-1e07-4c62-8b80-fe412bb0b7db/how_many_kinds_of_poetry_in_pre_islamic_period.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/how_to_do_copyright_on_website.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8faffb1-9c1a-4ae7-810c-49d222e0fe6d/minuet_in_g_minor_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/201536f3-ed31-4c27-a6d5-ba96e2fc9c9d/kevosiri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21c1d928-d501-4565-a052-3c4eeb2a212b/go_go_scooter_charger_lights.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a353e1f-25cb-4397-8919-faec962a0561/nubexirojogesitibixuriba.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_off0000f54a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54A 2856 bytes
SHA-256: e9f082bf757ab9622f11cc7161fe47238fc6298957bddb4dab6bb63e2b3933e0
font_01_sfnt_off0000ff6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6D 5460 bytes
SHA-256: e8ea5aa1ee1f29d93466027683aaaa92b33ea2b560126dfe46cbe7292ad304df
font_02_sfnt_off000111eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111EB 10596 bytes
SHA-256: 5ec6d78a93a59386e45d68773637000762f10732c166931b09a8b35c80b4617e