Malicious PDF — malware analysis report

Static analysis result for SHA-256 209041a59f99fa19…

MALICIOUS

PDF

37.7 KB Created: 2021-06-26 08:24:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5c2817610cb0291c834a1a8fe635d7a4 SHA-1: 5dd2a28d87dbf13a160f3cfe22990be341d13bac SHA-256: 209041a59f99fa19e1d59ea2768436c486fcdf56b0d3b341e322c3195efe8e4c
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a phishing lure due to its image-only nature and embedded links. The document contains numerous links pointing to potentially compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malicious content or redirect users to phishing sites. No scripts were extracted, but the PDF structure itself is indicative of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7855

Heuristics 6

  • 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 37 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://deurenhanger.nl/userfiles/file/muzidokiraromavumun.pdf In PDF document text
    • https://jackyrouxmethode.com/userfiles/file/moxuwugubifakosiso.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/8vm9ld02r72srnvk8q8r6aqlve/kokijater.pdfIn PDF document text
    • http://exito-opakowania.pl/userfiles/file/bivegagopoko.pdfIn PDF document text
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/47794726321.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/9f95360534356cc05f2a19de868c3c9d/binufixena.pdfIn PDF document text
    • https://recapress.com/ckfinder/userfiles/files/jiwuzefu.pdfIn PDF document text
    • http://anvlaw.com/userfiles/file/54597623932.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/jfvs4mb2s3kf5foef0mstk98pb/kijavutowimebawur.pdfIn PDF document text
    • http://tostonet.cl/ckfinder/userfiles/files/poguvediguxumetevabopal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=tamil+latest+movie+download+2021PDF link annotation

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