Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6b2544534926257…

MALICIOUS

PDF

38.6 KB Created: 2021-09-19 22:36:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5c08840116c9e513570cca9b2cbdfbc1 SHA-1: 413072dfd9ff730ce14dcaa9eca08bd75b654cfd SHA-256: a6b2544534926257bb62a3171081eab0859a5f2177c2c1c45d6bee61d72aa3ee
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size and image-only content, typical of a screenshot designed to trick users into clicking an embedded link. The document contains numerous external URIs, many hosted on potentially disposable domains, suggesting a link farm used for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8579

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 38 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 http://pinzimoniofiumicino.eu/userfiles/files/gazobipeduwibat.pdf In PDF document text
    • http://www.smwiarus.pl/ckfinder/userfiles/files/83264901072.pdfIn PDF document text
    • https://amgaa.org/temp/files/5667384630.pdfIn PDF document text
    • http://konsultacjenaukowe.eu/Upload/file/nojibevivez.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/xodike.pdfIn PDF document text
    • http://smarttechsolutionukltd.com/uploaded_files/userfiles/files/fixobixusukilafibunexi.pdfIn PDF document text
    • https://globalybm.com/ckfinder/userfiles/files/1631345598.pdfIn PDF document text
    • https://kristinanamaste.eu/files/29795541719.pdfIn PDF document text
    • http://ourgans.org/userfiles/files/82911147309.pdfIn PDF document text
    • http://tamlaproject.com/userData/board/file/81263584601.pdfIn PDF document text
    • http://ornito-silesia.eu/userfiles/file/13298373879.pdfIn PDF document text
    • http://studiomanzella.com/userfiles/files/vadubezumavumud.pdfIn PDF document text
    • http://amunt.madteam.net/ckfinder/userfiles/files/84689827803.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/94381159879.pdfIn PDF document text
    • http://xageunion.com/userfiles/file/72117251693.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/58436741511.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=chalera+putt+2PDF link annotation

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