Malicious PDF — malware analysis report

Static analysis result for SHA-256 73c239f0e59f8687…

MALICIOUS

PDF

56.6 KB Created: 2021-04-02 18:12:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a77eb17ef1ccde1d9074abf272795aba SHA-1: 92631dceb4bb0a771541ad6341cb80d995fdc17d SHA-256: 73c239f0e59f8687bb58abdf94e2b36b0044e873fd8af17b09d28b91ee091c8c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which are disguised as job descriptions or book titles, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6975

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/strik?utm_term=the+screenwriter%2527s+bible+8th+edition
    • https://cdn.sqhk.co/vupapevixu/bjcnidr/cfo_job_description_samples.pdf
    • http://fly-drive.online/honda_self_propelled_lawn_mower_repairi03c3.pdf
    • http://vuvulusigi.scienceontheweb.net/mafoxerido.pdf
    • https://zutosexumapa.weebly.com/uploads/1/3/1/6/131606298/215493.pdf
    • https://cdn.sqhk.co/rafumufo/69sihFm/astonishing_comic_book_reader_apk.pdf
    • https://cdn.sqhk.co/xeduwukaxusa/jhjc2NF/fixibujufosidosuseramer.pdf
    • https://cdn.sqhk.co/xarobumevux/ahaiehc/truck_craft_dump_insert.pdf
    • https://gerugufudob.weebly.com/uploads/1/3/4/8/134869234/foxivatarelajifube.pdf
    • https://cdn.sqhk.co/jovowosifo/hggghZJ/18505795817.pdf
    • http://de-bewertung-id-q2e5t23.top/teacup_pigs_for_sale_in_vawele5.pdf
    • http://panexorumilogim.myartsonline.com/14181174520.pdf
    • http://xikexugisomap.rf.gd/optimism_pessimism_scale.pdf
    • http://rinitede.epizy.com/681067668.pdf
    • https://uploads.strikinglycdn.com/files/faea879a-af28-4185-a806-332f93c54980/parupobebotufal.pdf
    • https://uploads.strikinglycdn.com/files/b27c3492-8c5a-40a1-8cef-ae0a6cde70bc/bafirowugojoka.pdf
    • https://uploads.strikinglycdn.com/files/5d548055-c440-4db3-8370-47112c4a7dc6/dolores_cannon_books_for_sale.pdf
    • https://uploads.strikinglycdn.com/files/9b9fca64-b99d-4d3b-8f5d-d013f9a2c437/45731494145.pdf
    • http://sofikej.rf.gd/barebafitanijutamukozawex.pdf
    • https://uploads.strikinglycdn.com/files/6e883888-8c34-4be4-8c6d-630cb4731654/wupizip.pdf

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