Malicious PDF — malware analysis report

Static analysis result for SHA-256 e522438a7e222be6…

MALICIOUS

PDF

58.1 KB Created: 2021-04-28 22:19:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 047b86b4f3327402177ebf6abdc1c0cd SHA-1: b350b829968211e8ab3247511caf4daedd3fdc5d SHA-256: e522438a7e222be6bfa11b162d84b3be2ef197a466d7ba35132331efb00f3311
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7196

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gimoguvi.ru/strik?utm_term=cuanto+es+5+mililitros+en+onzas PDF link annotation
    • http://lotukaguw.sportsontheweb.net/67481990183.pdfIn PDF document text
    • http://zusiwibewire.mypressonline.com/oxford_practice_grammar_with_answers._advanced.pdfIn PDF document text
    • https://dupukaradox.weebly.com/uploads/1/3/6/0/136015529/menow-nadojiwole-fores.pdfIn PDF document text
    • https://nipituwosaxow.weebly.com/uploads/1/3/5/3/135312928/0ca8bc690aae8a1.pdfIn PDF document text
    • http://creditstar-kabinet.com/notewuz22yfg.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/jViguie/block_puzzle_new_1010.pdfIn PDF document text
    • https://cdn.sqhk.co/pesofesidoke/jnM8chg/xapaje.pdfIn PDF document text
    • http://13millions-warzone.store/13742820424phql8.pdfIn PDF document text
    • http://vavexefane.mypressonline.com/dinevovolowerumaxonoziti.pdfIn PDF document text
    • https://cdn.sqhk.co/sejarepezibo/Rhcja3y/57334088615.pdfIn PDF document text
    • http://es50off.pro/what_is_computer_parts_meaningzorkr.pdfIn PDF document text
    • http://vurovolapoza.mygamesonline.org/14916105563.pdfIn PDF document text
    • https://eed7fa7e-4f31-4ba6-8269-e73f07ac74c5.filesusr.com/ugd/93374d_022b1472efb44c2fb486ae386b2077c1.pdf?index=trueIn PDF document text
    • https://7be8961d-effb-4c78-a255-78c3c9f0be09.filesusr.com/ugd/3dd68e_18369a0edccf4c04af73e292e8175ffb.pdf?index=trueIn PDF document text
    • https://f87ce62f-3d5d-4c42-bff3-2e7d00444551.filesusr.com/ugd/72ed28_2a808540406c4aedbaac99ed9a783367.pdf?index=trueIn PDF document text
    • https://94db4134-5784-44c5-a63d-963e509970fa.filesusr.com/ugd/9c58c5_080ba555aecf43c69313bd1dfd4eef30.pdf?index=trueIn PDF document text
    • https://aa5f33e9-793b-4807-a257-9eac84d314d0.filesusr.com/ugd/aa57b2_04d27d520afa4fc08e56af5cde6a97ca.pdf?index=trueIn PDF document text