Malicious PDF — malware analysis report

Static analysis result for SHA-256 e69e981250db74e0…

MALICIOUS

PDF

82.0 KB Created: 2021-04-04 08:49:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eaec60ac8b76f513ef3fd0e5c3466747 SHA-1: 708ef1852207cfe819a8dbfb3467f05cfabec3c9 SHA-256: e69e981250db74e00277c054d19c22be8740d1f42195984be7796cf4c69dca63
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, suggesting a phishing or SEO manipulation attempt. ClamAV detected this file as Pdf.Phishing.Trojan, and the ML classifier also flagged it as malicious. While no scripts were explicitly extracted, the presence of numerous external URLs indicates a high likelihood of malicious intent to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://kuzutuzo.ru/strik?utm_term=what+are+the+attributes+of+servant+leaders
    • https://jodegometokak.weebly.com/uploads/1/3/1/6/131606115/pofeb.pdf
    • https://cdn.sqhk.co/posojuvapono/rjbiagi/student_bucket_list.pdf
    • https://mebolosedam.weebly.com/uploads/1/3/6/0/136009811/nenebawoleke_bafanoxebe_gikuxud_nuletevigalu.pdf
    • https://cdn.sqhk.co/fuperule/hf6rVui/axiomatico_greg_egan.pdf
    • https://danawojigu.weebly.com/uploads/1/3/1/4/131407111/56d775f7c7106.pdf
    • https://jasevumoxemu.weebly.com/uploads/1/3/4/7/134707335/4668812.pdf
    • https://dopakuxapat.weebly.com/uploads/1/3/4/8/134895633/25d2338ca43c67.pdf
    • https://cdn.sqhk.co/tatidukigag/dgiihVZ/influencer_meaning_in_spanish.pdf
    • https://fulesinarube.weebly.com/uploads/1/3/4/7/134729099/lojewidaxig.pdf
    • https://cdn.sqhk.co/nogorodizet/7hjhcjb/xuputibewiba.pdf
    • https://pagafika.weebly.com/uploads/1/3/5/3/135339488/mufizowat.pdf
    • https://cdn.sqhk.co/rekosiseweno/bieIi9Z/calculus_ii_cheat_sheet.pdf
    • https://cdn.sqhk.co/dutararopat/hXhhKEv/55780557503.pdf
    • http://dekagexagupeje.iblogger.org/strength_of_materials_formulas.pdf
    • https://pupazugosabi.weebly.com/uploads/1/3/4/8/134868946/wisoxepakel_bamikovatig_dikofujosedivew.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://denuvifateve.epizy.com/25_gramos_de_azucar_a_mililitros_son.pdf
    • http://kazaxese.epizy.com/66944237089.pdf
    • https://s3.amazonaws.com/vizegemawokaxe/descargar_budismo_moderno.pdf
    • https://s3.amazonaws.com/divelatoxa/franz_kafka_metamorphosis_full_text.pdf
    • http://pizusikobejitix.epizy.com/87519694891.pdf
    • https://s3.amazonaws.com/dezajok/jafax.pdf
    • http://wosemas.rf.gd/formal_commands_spanish_worksheet.pdf
    • https://s3.amazonaws.com/kegubinefuda/blood_bowl_2_stadium_level_4.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_off0001027b.bin
91d459a13ab973d31e0ac06e0c273380c535d0e873592114cb4ec65087fc81ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1027B 5208 bytes
font_01_sfnt_off0001143a.bin
dbf54ca7996c3eae776c1ac6276f0f141520e173963c758841436da6bc7150b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1143A 11096 bytes

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