Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e543b9f5926bcca…

MALICIOUS

PDF

65.6 KB Created: 2020-12-25 22:29:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5f2b853813be092b2bafc3239ef58ac SHA-1: 5a1b14ad3eed5ce34e7a20378a2e8fcae29ec3de SHA-256: 4e543b9f5926bcca232b1888964ffea836f43bb835ece5ab6fd85fd7e8d6ffc3
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains multiple embedded links that redirect to known malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains text that appears to be a lure related to application usage, suggesting a phishing or scam attempt. The presence of numerous links on disposable hosting further supports a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9679

Heuristics 4

  • 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
  • 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://gettraff.ru/strik?utm_term=is+the+cw+app+free+to+use
    • https://cdn-cms.f-static.net/uploads/4449000/normal_5fa5c8ce07256.pdf
    • https://static.s123-cdn-static.com/uploads/4445739/normal_5fe2f48334071.pdf
    • https://cdn-cms.f-static.net/uploads/4365560/normal_5fb4eff012fb1.pdf
    • https://duvinibekumexeg.weebly.com/uploads/1/3/4/6/134677329/mimuteloweru.pdf
    • https://cdn.sqhk.co/renapudovi/igqPXYP/human_fall_flat_ps4_gamestop.pdf
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/dbf1bac.pdf
    • https://cdn-cms.f-static.net/uploads/4369329/normal_5fda5aa571607.pdf
    • https://tajusubinem.weebly.com/uploads/1/3/4/8/134886452/3377090.pdf
    • https://tixuguzuw.weebly.com/uploads/1/3/4/0/134096155/245511.pdf
    • https://cdn-cms.f-static.net/uploads/4468812/normal_5fc2f214bef2c.pdf
    • https://cdn.sqhk.co/zikegasenar/9vWihvw/world_war_brothers_ww2_mod_apk.pdf
    • https://wisiwojapano.weebly.com/uploads/1/3/4/8/134896472/a4ad8f314557.pdf
    • https://cdn-cms.f-static.net/uploads/4392872/normal_5fd322b66587a.pdf
    • https://zagarete.weebly.com/uploads/1/3/4/6/134687236/xeribepasanoke_pukazatoposok.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e309.bin
6d8377f1bf7f96cc91ca48f380c55845e7f3520575e6ed3ee1df8e2ac1a5f9f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE309 5100 bytes

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