Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2c076c8a84ad038…

MALICIOUS

PDF

40.3 KB Created: 2021-09-28 18:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 95f40eea00f71e42eaf8190d45bb3e28 SHA-1: aa631aee26180fe55fc553059de9048c1cd5fe14 SHA-256: f2c076c8a84ad038b36b2bd0d0d8d8575ca586a4a09e71b25377dd58a6ec4b4f
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an image-based lure and numerous external links, a common tactic for phishing or malware distribution. Heuristics indicate it's an image-only document with a click-outward action, typical of a phishing lure. The presence of multiple links pointing to compromised CMS upload storage and disposable hosting further supports this. ClamAV also detected it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8553

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 40 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 https://crewmak.ru/uplcv?utm_term=can+you+lay+a+freezer+down+to+transport+it PDF link annotation
    • https://www.habitat-morvan.fr/ckfinder/userfiles/files/32949626869.pdfIn PDF document text
    • https://detmers-kontejner.hr/files/45270567994.pdfIn PDF document text
    • http://cuoredicane.it/userfiles/files/bafexuwi.pdfIn PDF document text
    • https://eseninternational.com/uploads/files/lazejarigor.pdfIn PDF document text
    • http://receptlap.hu/files/lowujugiwatewupifanu.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142965843a0a---wepexutuviwidoxaf.pdfIn PDF document text
    • https://efckrakow.pl/userfiles/file/duzuvotamumazakemunofap.pdfIn PDF document text
    • http://hotel-gerard-dalsace.com/upload/document/78790053075.pdfIn PDF document text
    • https://mimpishiosatu.com/contents/files/3677262063.pdfIn PDF document text
    • http://maszyny.pl/userfiles/file/demumutotulomo.pdfIn PDF document text
    • https://drticket.ir/basefile/drtiketcom/files/38636501244.pdfIn PDF document text
    • https://tuinvandecruys.be/file/76483401811.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614650691aa52---dazafubanojasipoxixum.pdfIn PDF document text
    • https://www.passion-rnd.com/upfile/files/2021/09/02/tebonil.pdfIn PDF document text
    • https://a-guskov.ru/uploads/files/98696978024.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/jetabajowulegefeseneji.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142eefe8f9d4---57228637157.pdfIn PDF document text
    • http://alothongtin.com/upload/FCK/file/mapomerenenazoza.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/ziborew.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/13398660191.pdfIn PDF document text
    • https://adci.vn/data/upload/file/moxevemuvudevov.pdfIn PDF document text
    • https://kaptenhoki.net/contents/files/48556614625.pdfIn PDF document text
    • http://agro-pasz.pl/ckfinder/userfiIn PDF document text

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