Malicious PDF — malware analysis report

Static analysis result for SHA-256 abfbc10ee6a21d69…

MALICIOUS

PDF

52.5 KB Created: 2021-09-12 22:01:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 908216afdf2cd99dea938a8e6c264995 SHA-1: b17a69474f8fb32240d5d90d6d4ba8b2c4f37a75 SHA-256: abfbc10ee6a21d693092084f866fc32175cf24e795df48b9ad287c51c3efd40f
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple heuristics, including ML and ClamAV, indicating malicious intent. It contains numerous embedded URLs pointing to other PDF files hosted on various domains, suggesting it functions as a link farm. The presence of 'utm_term_redirector=True' and the sheer number of links indicate a deliberate attempt to obscure the final destination and potentially distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7479

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://adlinefor.com/home/webagen/public_html/korn/data/file/roxuzupavali.pdf
    • http://chinajessie.com/seadata/data/uploads/img/file/163111969763.pdf
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc7f6eefd5---ronaz.pdf
    • http://myatkinsonfamily.com/userimages/73114740130.pdf
    • http://ajisushionline.com/uploads/files/7190436732.pdf
    • https://people11people.com/uploads/File/xodenen.pdf
    • http://woykoff.hu/upload/file/gupuzowobapo.pdf
    • http://caopump.com/admin/userfiles/file/76010685091.pdf
    • http://yourhandmadeitems.com/userfiles/file/86317051848.pdf
    • http://barbusci.it/maisUserFile/file/47644797471.pdf
    • http://hykylalumni.org/userfiles/tevosavebadugewufurosu.pdf
    • http://budoprojekt.eu/obrazy/file/sawalutuwodunofut.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=setting+alarm+on+android

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