Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c46adabef490439…

MALICIOUS

PDF

92.3 KB Created: 2020-12-24 13:40:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba708d18162eb30b2a3fe517e658dd01 SHA-1: 11be4327cd4c86e6818965762faf118671c76bfb SHA-256: 1c46adabef490439283a179149f39fd7818cfd7ccb605a6564484ed6aa08b38f
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to reference game titles, suggesting a lure. The presence of multiple PDF links, including one to a potentially malicious redirector, indicates an attempt to direct users to harmful sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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
  • 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://cctraff.ru/strik?utm_term=armed+vs+zombies+garden+warfare+2
    • https://cdn.sqhk.co/xenetomapum/RLS9MQ8/epic_games_support_rocket_league.pdf
    • https://cdn-cms.f-static.net/uploads/4369766/normal_5fdc8d8c64607.pdf
    • https://cdn.sqhk.co/kuxefoxo/ejgqHia/pacsun_gift_cards_near_me.pdf
    • https://cdn-cms.f-static.net/uploads/4374984/normal_5f8d15819295c.pdf
    • https://cdn.sqhk.co/muzexeragod/jiNPjjr/80101534865.pdf
    • https://cdn-cms.f-static.net/uploads/4372086/normal_5f8c62f93733a.pdf
    • https://jinunezig.weebly.com/uploads/1/3/4/3/134308797/jamapuzaxaza.pdf
    • https://cdn-cms.f-static.net/uploads/4467027/normal_5fd63913eea05.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/fa5e5f29-62e7-411e-8f94-dd68fab64299/gorigobarudejon.pdf
    • https://uploads.strikinglycdn.com/files/28bbd476-6f9e-43ec-ada5-b441c14aa142/80229911529.pdf
    • https://uploads.strikinglycdn.com/files/348c921e-b2ef-4df6-8cf6-f1225cd0d605/badland_apex_12000_lb_winch_manual.pdf
    • https://uploads.strikinglycdn.com/files/038a903b-a1b8-4719-9322-376cf0443b44/zombies_run_board_game.pdf
    • https://uploads.strikinglycdn.com/files/ba5ab9b8-a488-4af9-8ced-4e162a2451ab/ice_age_adventures_game.pdf
    • https://uploads.strikinglycdn.com/files/d9f23588-360b-4f9d-a3f0-631470469c37/pajurexovo.pdf
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011304.bin
e452b35670822cfcb755abc3f8c8a8b2da96a58fb8f9005c8024e0812b33c32b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11304 5660 bytes
font_01_sfnt_off0001264e.bin
7bd9edfe67dc112dceb1d76f02e89d7173f59aa4dd5f498e2ba3dff7977db290		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1264E 12400 bytes
font_02_sfnt_off00014edc.bin
877f34ac211c6f021e464c0a8529261fd3b15098c74e1dee00237458e676f3b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14EDC 16108 bytes

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