Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbcf0aba5dee1d7f…

MALICIOUS

PDF

49.6 KB Created: 2021-01-17 16:18:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20ec09f5a1720feb7e39cf8c2e717141 SHA-1: daa66e70e148bc5fd0bbae7eeb29113a18343d05 SHA-256: fbcf0aba5dee1d7ff518d98fc062da83d156daf90bfd1d871b73366ac2fa49a0
202 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-heavy content, typical of a screenshot designed to hide clickable links. It contains multiple links to redirector infrastructure, with one prominent URL leading to 'traffmen.ru', a known malicious redirector. The ClamAV detection and ML classifier further support its malicious nature, indicating it's likely a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7360

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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 49 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.
  • 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://traffmen.ru/aws?utm_term=dayforce+employee+guide
    • https://site-1173285.mozfiles.com/files/1173285/pikuzukuwasajomajilosom.pdf
    • https://masenajeronuzes.weebly.com/uploads/1/3/1/6/131637464/zakedexisawoto-makozuzoda-puwajija-rigajujenal.pdf
    • https://saniluje.weebly.com/uploads/1/3/4/3/134323688/jovokubefako-mavilijanodu.pdf
    • https://watumuguv.weebly.com/uploads/1/3/2/6/132695830/vovaxijapel.pdf
    • https://site-1168148.mozfiles.com/files/1168148/85097107432.pdf
    • https://wirexefe.weebly.com/uploads/1/3/4/5/134577033/849159.pdf
    • https://site-1168153.mozfiles.com/files/1168153/buvetesokifavipovu.pdf
    • https://site-1173352.mozfiles.com/files/1173352/dasudavotefediv.pdf
    • http://gopubewigofopa.iblogger.org/bad_guy_piano_sheet_music.pdf
    • https://fiwatinizajof.weebly.com/uploads/1/3/0/8/130874156/fba0642a.pdf
    • http://pamemoroza.epizy.com/woveperuj.pdf
    • https://s3.amazonaws.com/sabobenuwe/corki_build_guide_s8.pdf
    • http://panejolaraluka.rf.gd/77943471365.pdf
    • http://folijurojavagig.epizy.com/53575154170.pdf
    • http://kelawezup.rf.gd/tenant_eviction_notice_template.pdf
    • https://s3.amazonaws.com/zevutebulaworel/73770669694.pdf

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