Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9bf2ea8675d40f5…

MALICIOUS

PDF

46.2 KB Created: 2021-03-16 03:48:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 549f40c1ec8cc8a7731bf8e942d63f13 SHA-1: 406f0c098bb389f68529708c3de590541b22c067 SHA-256: f9bf2ea8675d40f5fbc91439736ce612b571ee3e1dd53acb3d1b4b6df217e059
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to direct users to potentially harmful websites. The document body, though heavily obfuscated, appears to be a lure related to a syllabus download, which is a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7951

Heuristics 5

  • 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.
  • 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://soxebez.ru/award?keyword=cat+syllabus+2020+pdf+download PDF link annotation
    • https://cdn.sqhk.co/savageven/ihcjhgi/70111107820.pdfIn PDF document text
    • http://japarof.mywebcommunity.org/nudesuwovemezid.pdfIn PDF document text
    • https://lufakonu.weebly.com/uploads/1/3/4/7/134711707/vazexodubavi.pdfIn PDF document text
    • http://xemokajoled.medianewsonline.com/99175530322.pdfIn PDF document text
    • https://cdn.sqhk.co/ronofumito/Iihqgfu/who_gave_eren_kruger_the_attack_titan.pdfIn PDF document text
    • http://tulomodev.getenjoyment.net/kederagoxovarata.pdfIn PDF document text
    • https://xidazujagavoza.weebly.com/uploads/1/3/1/4/131453269/eece4018.pdfIn PDF document text
    • https://cdn.sqhk.co/fijajiles/jo1Xzm6/geometry_worksheet_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/livefodam/miesXjd/icse_class_9_physics_syllabus_2021.pdfIn PDF document text
    • https://cdn.sqhk.co/dawadetugas/gfMhhvS/98890660071.pdfIn PDF document text
    • https://neboxikadifi.weebly.com/uploads/1/3/4/5/134588308/6251273.pdfIn PDF document text
    • https://cdn.sqhk.co/sazipuvaxiv/fIBJUAN/microsoft_translator_browser_extension.pdfIn PDF document text
    • https://jedexapotup.weebly.com/uploads/1/3/4/4/134472831/8448366.pdfIn PDF document text
    • https://d2faa26e-66ca-44cd-8f84-883624a71019.filesusr.com/ugd/dbbfd0_93c8578cd407470bbe3eb33032cbf270.pdf?index=trueIn PDF document text
    • http://gavawekib.myartsonline.com/43853608051.pdfIn PDF document text
    • https://e42ce0b3-f376-4cb5-9abe-507fdbb9570c.filesusr.com/ugd/603474_6f8d7af7d7c041ad99061126879365da.pdf?index=trueIn PDF document text
    • https://a84030a7-2e48-4039-807a-383e2b7216cc.filesusr.com/ugd/c5d40f_08701b362b2f409f90b3a776927da419.pdf?index=trueIn PDF document text
    • https://f33d1b56-f518-462b-b61f-c1b5c1ba661c.filesusr.com/ugd/1c44ce_6b8ac74d9513444c9ac0f87a97220880.pdf?index=trueIn PDF document text
    • https://123949be-7110-4ba3-a240-a7df06fb38ce.filesusr.com/ugd/80fd5d_09e1aa19d7274e48820deacabad7c3bf.pdf?index=trueIn PDF document text
    • https://97a45c9e-1ab5-462a-bfe2-fded34b9a8b9.filesusr.com/ugd/b50c55_6729d61e93274fd1b20f13ed8c29f050.pdf?index=trueIn PDF document text
    • https://18bc7be3-897e-46c1-a475-efc190d089bd.filesusr.com/ugd/62845f_c5d0d2cba52942d68aa1f3a8016e670e.pdf?index=trueIn PDF document text

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