Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4c4b9729e142cda…

MALICIOUS

PDF

49.6 KB Created: 2021-02-24 03:16:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 860e5c57b0ce57e7d48f4e67738498a0 SHA-1: 0e21b90035b4fc86abbb8264bd895c9d30871186 SHA-256: c4c4b9729e142cdaf79c69092be8798cfcf18c224392c750cbe694735ab29abf
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to a Wikipedia article, likely to trick users into clicking the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8268

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/aws?utm_term=what+is+the+ratio+of+nitrogen+to+oxygen+in+earth%2527s+atmosphere PDF link annotation
    • https://cdn.sqhk.co/rekewuneboxu/vif0dji/getting_over_it_with_bennett_foddy_wikipedia.pdfIn PDF document text
    • https://defilapaxupote.weebly.com/uploads/1/3/5/3/135335242/sitexok.pdfIn PDF document text
    • https://cdn.sqhk.co/jasurisunav/jhg0O5u/served_in_spanish_legal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446921/normal_60275f6eedae5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403260/normal_5ff167e1a2122.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466679/normal_602ce2561250c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420599/normal_60070b302b468.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413019/normal_6016eb93be08e.pdfIn PDF document text
    • https://cdn.sqhk.co/vinogusi/jfqY8jf/kisotaduvobajuja.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422371/normal_5fe0e5cb77f7b.pdfIn PDF document text
    • https://vexefanakaxaki.weebly.com/uploads/1/3/4/8/134871487/5bf5a9af300fea.pdfIn PDF document text
    • https://cdn.sqhk.co/bekutojeke/RSyifji/yakuza_kiwami_pocket_circuit_racing_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/woledibiroju/hbiigfW/soruxikonigosalupokukat.pdfIn PDF document text
    • https://sukaxivex.weebly.com/uploads/1/3/4/8/134895869/jusekuruwotelulor.pdfIn PDF document text
    • https://cdn.sqhk.co/depadukat/hfviiuS/activity_launcher_rcs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369772/normal_5ff717c6e8834.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwonesi/ieEszhi/68562311097.pdfIn PDF document text
    • https://jizotigop.weebly.com/uploads/1/3/0/8/130874082/7782725.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388613/normal_5fcc6eb5268f9.pdfIn PDF document text
    • http://jejavonafire.epizy.com/kubaved.pdfIn PDF document text
    • http://bixikaw.epizy.com/online_games_multiplayer_android.pdfIn PDF document text