Malicious PDF — malware analysis report

Static analysis result for SHA-256 112984f25a0ffd54…

MALICIOUS

PDF

68.0 KB Created: 2021-01-06 20:09:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 125ab4ce47cce86a3952a8c3465c5f7e SHA-1: b21f1ac6edf5de3b34c44c42c4bc465f20b91b81 SHA-256: 112984f25a0ffd5445872a24307cd028cad63a6f3842f6a5462f22d2efbbdbc1
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many pointing to PDF files hosted on Weebly and sqhk.co domains, suggesting a link farm or redirection mechanism. The embedded content, though heavily obfuscated, appears to be related to online games, likely serving as a lure for malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • 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://trafftec.ru/aws?utm_term=last+battleground+survival+battle+royale
    • https://viwutexotopuj.weebly.com/uploads/1/3/4/5/134522905/527c2619.pdf
    • https://mefimume.weebly.com/uploads/1/3/1/4/131437875/fodagesekexezirawir.pdf
    • https://raxagipob.weebly.com/uploads/1/3/4/8/134883443/6659250a050.pdf
    • https://sizojupitad.weebly.com/uploads/1/3/4/3/134332657/sexozofifutasutuvipe.pdf
    • https://cdn.sqhk.co/foxidagon/axwjf3I/plex_server_remote_access_not_working.pdf
    • https://cdn.sqhk.co/susiwozobo/tgijiX7/how_to_play_42_dominoes_youtube.pdf
    • https://cdn.sqhk.co/xewimoziwuvo/hcXib0k/30826019950.pdf
    • https://cdn.sqhk.co/jaxabofapuw/jgeAgeS/best_hero_wars_mobile_team.pdf
    • https://totapige.weebly.com/uploads/1/3/1/4/131483287/2987523.pdf
    • https://cdn.sqhk.co/zevolazezag/jgzjeGl/teacher_apps_free_download.pdf
    • https://cdn.sqhk.co/keserina/WIjijwV/suluwovepedawuwuzixige.pdf
    • https://xetasigebe.weebly.com/uploads/1/3/4/4/134443645/ae7c7bd1fb.pdf
    • https://dolujete.weebly.com/uploads/1/3/4/6/134674842/nidob.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_off0000ce74.bin
00dd276632bf73b564bec0e90450d5a0b091b1673dbeb99e63e1cc06372b7713
pdf-font-stream PDF embedded font (sfnt) at offset 0xCE74 5236 bytes
font_01_sfnt_off0000e05c.bin
1f5b3b8228485228f27c0f4f28bb3faff039c5bf090ab93c72f2af6c45017cfe
pdf-font-stream PDF embedded font (sfnt) at offset 0xE05C 10240 bytes