Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5e9f32c0edaebf6…

MALICIOUS

PDF

76.2 KB Created: 2021-05-12 09:16:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 993b50fa3c75d1f3e96ff1c392b3cb0e SHA-1: 68ed5d1c7630e20b83cb7763495ac621dfea4ba5 SHA-256: e5e9f32c0edaebf666a8d56fac89bb2ac4a00edbe6389b6a83a374ceca9f2439
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm with numerous external URLs. The primary URL, 'https://bologen.ru/strik?utm_term=should+i+read+madame+bovary', suggests a potential phishing or malicious redirection attempt. The structure indicates a likely attempt to distribute further malicious content or manipulate search engine results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://bologen.ru/strik?utm_term=should+i+read+madame+bovary PDF link annotation
    • https://jorevubo.weebly.com/uploads/1/3/4/8/134869484/nopajer_keras.pdfIn PDF document text
    • https://nefolebar.weebly.com/uploads/1/3/4/4/134400051/1065200.pdfIn PDF document text
    • https://lakomefolowe.weebly.com/uploads/1/3/0/7/130776578/3611922.pdfIn PDF document text
    • http://sarupunojupud.sportsontheweb.net/57362439545.pdfIn PDF document text
    • https://xipunozelizu.weebly.com/uploads/1/3/1/3/131382486/mubujogiwigexivowu.pdfIn PDF document text
    • https://bosijoputa.weebly.com/uploads/1/3/4/3/134317673/e707baea.pdfIn PDF document text
    • https://baduzasozem.weebly.com/uploads/1/3/1/4/131407439/suvepodamivi-bodemepor-lutonijunuvo-ferususinedi.pdfIn PDF document text
    • http://takipibimaxubov.sportsontheweb.net/19731543480.pdfIn PDF document text
    • https://zaxonoso.weebly.com/uploads/1/3/1/3/131381259/29bef959737bfc.pdfIn PDF document text
    • https://nedovewa.weebly.com/uploads/1/3/5/3/135316636/fipasulikasofa_tapafev.pdfIn PDF document text
    • https://xufudigu.weebly.com/uploads/1/3/4/5/134515134/tufadadijaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c84ffda1-e72a-45fa-8ce8-a771970cf326.filesusr.com/ugd/9fd656_8cdd7da1d3934cc7a48b5d51a716df1d.pdf?index=trueIn PDF document text
    • http://rokumezex.epizy.com/how_to_pair_2_jam_zero_chill_speakers.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/baal_veer_episode_590.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/what_will_the_next_stage_of_human_evolution_be.pdfIn PDF document text
    • https://11ab4cf5-156d-4417-99e9-5039b2a7eb5f.filesusr.com/ugd/82d61e_8785457d3f5c4130986f86be6aecf36b.pdf?index=trueIn PDF document text
    • https://436010f1-0dd7-4950-aec0-3bdf337573e8.filesusr.com/ugd/5a4c69_61d951f5cde343adab3477082c2ec3af.pdf?index=trueIn PDF document text
    • http://wozitoso.atwebpages.com/vuvuveju.pdfIn PDF document text
    • https://66f9c2bc-82a6-463d-9ccd-9c94d3d8805e.filesusr.com/ugd/b361c6_ecf130071b9c4756b228df7e8d6a42c1.pdf?index=trueIn PDF document text
    • http://lapabogi.rf.gd/mainstays_tv_stand_assembly_directions.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/mufabakifakuveven.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/bodybuilding_meal_plan_for_female_beginners.pdfIn PDF document text
    • http://mogigolutatuliz.rf.gd/71471494822.pdfIn PDF document text
    • http://donijexufenu.onlinewebshop.net/varicela_en_los_nios.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE7 5292 bytes
SHA-256: 449f64c202f7e327d4d8535784422ff88cd62bd27a5d5db9a3d1afd855c79020
font_01_sfnt_off0000fdc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC1 11024 bytes
SHA-256: 471cc37feb4c037beac1154c5eafaf18cfdc76504eb642427484652ac6a0c306