Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e0f1d58ee0a6e37…

MALICIOUS

PDF

38.3 KB Created: 2021-09-17 09:50:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9f37997d0d0006dc12e2b44918c983ce SHA-1: 80edc792dae450b0e2f65c9d20b075b3f410be0c SHA-256: 3e0f1d58ee0a6e370ca27fc6692c8f9f38028f5e10022322de570b8377b535e0
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and an ML classifier. It employs an image-based lure, a common tactic for phishing or malware distribution. The document contains multiple external URIs, including one pointing to 'inwebjor.ru', suggesting it's designed to redirect the user to a potentially harmful website. The presence of numerous links and disposable hostnames further supports its role as a link farm for malicious redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8275

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 https://inwebjor.ru/uplcv?utm_term=how+to+copy+gallery+from+android+to+android PDF link annotation
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/161425406cc355---vadutopadividexezomot.pdfIn PDF document text
    • http://energosol.pl/images_cms/file/kinodavugalomuwufa.pdfIn PDF document text
    • http://77owship.netsociality.com/upload/files/zozitevolivetaganakofofa.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/rubav.pdfIn PDF document text
    • http://csc0532.com/userfiles/file/20210917063117_pvadt1.pdfIn PDF document text
    • http://lindseyderence.com/userfiles/files/38193939479.pdfIn PDF document text
    • https://copyjokertw.aw6.tw/uploadfile/qu4_qu106_com/files/nefax.pdfIn PDF document text
    • http://519pf.com/userfiles/files/durasozutogitukamatuko.pdfIn PDF document text
    • http://xaydunglenguyen.vn/upload/files/3066e0.pdfIn PDF document text
    • https://postelezmasivu-ostrava.cz/ckfinder/userfiles/files/momobunamolus.pdfIn PDF document text
    • https://wemservice.com/ckfinder/userfiles/files/54148005262.pdfIn PDF document text
    • http://weorderfood.com/uploads/files/92710408415.pdfIn PDF document text
    • http://gmart-express.com/demo/uploadpic/file/ropizuniputumorozoka.pdfIn PDF document text

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