Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2139510f5ffad06…

MALICIOUS

PDF

67.7 KB Created: 2021-03-08 21:27:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b6162f2b478f12cc9fb024f6d26563f SHA-1: b70249a5bf0ce1414406dec5fa300092f9ea9ab8 SHA-256: e2139510f5ffad0680285051d5733b500708fd129a5c286ceed6fc9288f4915d
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, flagged as a link farm, with one suspicious URL pointing to a known malicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/123?utm_term=math+transformations+song
    • https://gufekesunix.weebly.com/uploads/1/3/4/8/134888283/5125385.pdf
    • http://diporesorojina.scienceontheweb.net/add_monster_cards.pdf
    • https://vawigaxonisas.weebly.com/uploads/1/3/1/4/131438461/pitilufuno_fojoxazudugubu_kozipiru.pdf
    • https://cdn.sqhk.co/rolileduvof/VoieQic/diversity_and_inclusion_training_outline.pdf
    • https://cdn.sqhk.co/wituruxa/jglwjax/tavazavanus.pdf
    • https://wasatetokis.weebly.com/uploads/1/3/4/5/134513062/2199c0a03b1a3.pdf
    • http://rafupofamurawaf.mygamesonline.org/nuwogil.pdf
    • https://verakolor.weebly.com/uploads/1/3/1/3/131379730/1633355.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1beb4bfb-5191-4ba7-bf20-f5180554f32c/audi_a6_c5_service_manual_free_download.pdf
    • https://s3.amazonaws.com/dewazewokib/galarian_forms_weezing_ability.pdf
    • https://s3.amazonaws.com/xuzakob/56406013432.pdf
    • https://s3.amazonaws.com/gapuruxumeg/message_pro_apk.pdf
    • https://s3.amazonaws.com/lomogas/50227270110.pdf
    • http://vekisofekibote.myartsonline.com/romeo_juliet_quotes_baz_luhrmann.pdf
    • https://s3.amazonaws.com/robumuduluwise/50345707639.pdf
    • https://s3.amazonaws.com/figidireki/78815239835.pdf
    • https://s3.amazonaws.com/vasofirida/33074603338.pdf
    • https://uploads.strikinglycdn.com/files/bb0219a2-4af7-4a4f-99eb-785f4e26cb45/ng_book_angular_6_download.pdf
    • https://s3.amazonaws.com/vuliwisuwig/project_closeout_report_for_fifa_world_cup.pdf
    • https://s3.amazonaws.com/vifusupegiza/56364658024.pdf
    • https://uploads.strikinglycdn.com/files/d261ff69-f750-4fa8-8c58-a79056cb6311/xipolenakam.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0a8.bin
3b7b5c2bddff64c97a3d3ff32d3e8f46e2fb1b0a949aecd5e23da017c7792fb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A8 5152 bytes
font_01_sfnt_off0000e213.bin
76b4bce4cfd93ad38a87d39a7c99d1ff50c698083f0dd6b9fc6fb49e57de2024		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE213 9212 bytes

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