Malicious PDF — malware analysis report

Static analysis result for SHA-256 b10b4704ca280297…

MALICIOUS

PDF

50.6 KB Created: 2021-02-09 07:05:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 634198272e7cfd17bd1d639c9a1808ed SHA-1: 0ca75addf5f91d6685efa052f960291682b4ec11 SHA-256: b10b4704ca2802975d51991374bb8810ac9f7f55233107b0daab78fa3f42d0c4
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier. It employs an image-based lure, typical of phishing, to trick users into clicking a link. The document contains numerous external URIs, including one pointing to 'jacksth.ru', which likely serves as a redirect to a malicious payload or phishing page. The presence of multiple disposable domains and link farm characteristics further indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7360

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 50 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://jacksth.ru/aws?utm_term=excel+2016+bedingte+formatierung+geht+nicht
    • https://dapobirot.weebly.com/uploads/1/3/4/8/134888013/pefuwu_vurubi_nukiwalewevupu_wekurogufenes.pdf
    • https://static.s123-cdn-static.com/uploads/4491665/normal_60010992e72c3.pdf
    • https://cdn.sqhk.co/domonuxasi/seAhcid/31902232727.pdf
    • http://navewezaninub.iblogger.org/60013808954.pdf
    • http://xavelodezazil.iblogger.org/77127890366.pdf
    • http://rejuxipo.iblogger.org/consumer_reports_compare_cell_phone_plans.pdf
    • http://kavalibosesevu.22web.org/58305506254.pdf
    • https://cdn.sqhk.co/zikonidenijo/CheHgci/walawud.pdf
    • https://nodararikerat.weebly.com/uploads/1/3/4/8/134885074/a2288c41eee.pdf
    • https://cdn-cms.f-static.net/uploads/4393028/normal_5fd86d101a6eb.pdf
    • https://static.s123-cdn-static.com/uploads/4473359/normal_5fcb3937f1a14.pdf
    • https://cdn.sqhk.co/dikozogub/Qjauegc/matoxefilamedamemukava.pdf
    • https://static.s123-cdn-static.com/uploads/4481423/normal_5ffa4d9e6ccfc.pdf
    • https://cdn.sqhk.co/dedogupazib/jbBggai/do_free_dating_apps_work.pdf
    • https://static.s123-cdn-static.com/uploads/4462694/normal_5feb72b89aa3f.pdf
    • https://renobikedasel.weebly.com/uploads/1/3/4/8/134897329/8822411.pdf
    • http://pajimej.epizy.com/english_worksheet_for_grade_5_cbse.pdf
    • https://s3.amazonaws.com/mejobu/abduction_movie_hdpopcorn.pdf

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