Malicious PDF — malware analysis report

Static analysis result for SHA-256 e96781e62c93ccff…

MALICIOUS

PDF

92.1 KB Created: 2021-02-13 03:40:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5ed5bb3936c29643dd289fee17737a27 SHA-1: e0b38e188b374897e54ce924b788e864fdc5967c SHA-256: e96781e62c93ccff04720c8bc5698b912fa83011b9f2903fd867ec1109b1cd6d
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=mm8+boss+order PDF link annotation
    • https://cdn.sqhk.co/vusabutam/gfpdDCX/forum_star_wars_galaxy_of_heroes_free.pdfIn PDF document text
    • https://cdn.sqhk.co/jowapezo/VBjhchi/quiz_logo_game_level_6_answers.pdfIn PDF document text
    • https://naketutetan.weebly.com/uploads/1/3/4/6/134660231/64dabdbb97c677.pdfIn PDF document text
    • https://cdn.sqhk.co/woleparos/l5jdugg/one_good_deed_david_baldacci_book_review.pdfIn PDF document text
    • https://murimuwisoruda.weebly.com/uploads/1/3/4/0/134017177/f557090.pdfIn PDF document text
    • https://lepamatizetu.weebly.com/uploads/1/3/0/7/130739269/vubalewor-vuxovi-wubelig-zalokudo.pdfIn PDF document text
    • https://vafunaparixidi.weebly.com/uploads/1/3/4/6/134627598/rugelalukeva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404124/normal_601ca2f785d91.pdfIn PDF document text
    • http://tasuzafu.22web.org/glynn_county_inmate_population_report.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446289/normal_6021236066e80.pdfIn PDF document text
    • https://cdn.sqhk.co/jivazufevi/ieTidqO/call_of_duty_world_at_war_bots_pc.pdfIn PDF document text
    • http://pozopamux.iblogger.org/household_ledger_excel_template.pdfIn PDF document text
    • http://kegujusotuk.iblogger.org/58285184263.pdfIn PDF document text
    • https://wigewowatabosaz.weebly.com/uploads/1/3/4/3/134352056/3937806.pdfIn PDF document text
    • https://wafiludelo.weebly.com/uploads/1/3/1/4/131437380/xavabigelif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://talidarufuji.epizy.com/53175711860.pdfIn PDF document text
    • http://zazuxidavo.rf.gd/34137132078.pdfIn PDF document text
    • http://zulegaxevo.epizy.com/pokemon_tcg_online_card_value_guide.pdfIn PDF document text
    • http://fabodatutowew.epizy.com/wisconsin_individualized_service_plan_template.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_off00012ccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CCC 5068 bytes
SHA-256: 18484ae66a6e510d7cad4df95f0e1db0fa83a6cbb7e4f2c97159f39d724beabc
font_01_sfnt_off00013dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DFD 10948 bytes
SHA-256: 133569d3a69e88075dc6c273a47eff78c1e25c62f500693bce6e4f7908505b36

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