Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a5a64d2c0dc9f4c…

MALICIOUS

PDF

71.3 KB Created: 2020-12-29 21:19:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 205040e50e4b83d20861d119da29ce37 SHA-1: 53b1c20dd3f73b23fedbe74a4e467c09bc95be1a SHA-256: 6a5a64d2c0dc9f4c3587152fe3fe0b0b51b104a2bcecf38c7a24a80019a64304
186 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on disposable domains, suggesting a link farm or phishing operation. The 'Jungle run game show' text in the document body, combined with the URL containing 'jungle+run+game+show', indicates a lure to a potentially malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://trafficel.ru/strik?utm_term=jungle+run+game+show
    • https://degevibuv.weebly.com/uploads/1/3/5/3/135316410/8112793.pdf
    • https://cdn-cms.f-static.net/uploads/4369486/normal_5fb401135a9af.pdf
    • https://static.s123-cdn-static.com/uploads/4385848/normal_5fc776638af5c.pdf
    • https://cdn.sqhk.co/vogidasobe/jf30jgt/lep_s_world_3_gameplay.pdf
    • https://cdn.sqhk.co/zetanitanedo/KrXKThc/xixazajinedusalibizus.pdf
    • https://navubenawegef.weebly.com/uploads/1/3/4/3/134320789/xafuvoxuv.pdf
    • https://daniveledize.weebly.com/uploads/1/3/4/9/134900130/6336699.pdf
    • https://rofuvawe.weebly.com/uploads/1/3/4/3/134363923/gexula-mimagakodiz-sexetiviz-raxawufofud.pdf
    • https://cdn-cms.f-static.net/uploads/4456372/normal_5faf4aafc7230.pdf
    • https://static.s123-cdn-static.com/uploads/4459794/normal_5fe53cd2466e2.pdf
    • https://jamafijuzu.weebly.com/uploads/1/3/1/4/131437216/0c512.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dae6.bin
0b60d30d24000e380751941f9ac3edab270831559d198afd3ab6fd089620b0e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE6 5180 bytes
font_01_sfnt_off0000ec6c.bin
f167634ba505513ff7f94b853ca6ba6e620e001bbcac3f9ec9b49afbda695ff9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6C 10592 bytes

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