Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab26a65c34e1f5ef…

MALICIOUS

PDF

37.2 KB Created: 2021-07-14 02:44:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: beb744b3ac260f191e795f5e56f825b3 SHA-1: dff54788d1b608923336587f3830f88a65577d13 SHA-256: ab26a65c34e1f5ef6a50a50060b82d49ac45dd9e587b322024bc1aa5e331ccd9
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF employs an image lure, typical of phishing, to entice users into clicking a link. This link directs to a compromised WordPress site, which then serves a malicious PDF. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to deliver a secondary payload or conduct further phishing activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6864

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 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.
  • 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://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607863897dfec---xojanexugezezeruxef.pdf In PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/3ce7ded29fc6e2405d5bf5fa5832cc44/12735486137.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/bea48559bc49afe18443ef3ccc0dc9f2/35768071257.pdfIn PDF document text
    • http://reklama-v-sochi.com/ckfinder/userfiles/files/kuteremoje.pdfIn PDF document text
    • http://yule-sign.com/upload/editor/file/20210629081353.pdfIn PDF document text
    • https://finatwork.com/userfiles/file/19119915917.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b57b884a2---mevujisapikaxidajiza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=metronidazole+and+sulfa+allergyPDF link annotation

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