Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae6f6ccbc0f7a8a1…

MALICIOUS

PDF

78.4 KB Created: 2021-04-20 22:50:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0264bbd92e653f2a9f705b1b4cf4bd7e SHA-1: 191fbe3cb43271e9fdc252f79e087b78ba3d9118 SHA-256: ae6f6ccbc0f7a8a1188fa6d128364d35816c797dd68e22ac7be5cf62a5567f17
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing attempt. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and URI patterns are consistent with phishing lures designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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://seumenha.ru/strik?utm_term=how+do+you+cook+frozen+chicken+breast+in+the+crock-pot PDF link annotation
    • https://kumapeforurimo.weebly.com/uploads/1/3/4/6/134664671/gexaxovip_zepijelivenepo_matapatupisepu_lemisaxiteru.pdfIn PDF document text
    • http://gitikirazidapi.medianewsonline.com/mobile_phone_repair_training_courses.pdfIn PDF document text
    • https://deriwofapavuz.weebly.com/uploads/1/3/4/3/134311795/ritosodowekatunoka.pdfIn PDF document text
    • https://xuxufagitagagi.weebly.com/uploads/1/3/0/7/130740521/renejanet-tepamazudoref-zalare.pdfIn PDF document text
    • http://vibemezanolex.mypressonline.com/windows_command_line_interface.pdfIn PDF document text
    • https://cdn.sqhk.co/lididiregi/g6W4xja/nejep.pdfIn PDF document text
    • http://wewogokuwidu.mywebcommunity.org/72_king_kutter_finish_mower_parts.pdfIn PDF document text
    • http://gajelifuluxapov.mywebcommunity.org/metered_dose_inhaler_technique.pdfIn PDF document text
    • http://waralolojogeta.sportsontheweb.net/14816956887.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/WieNhev/paniwi.pdfIn PDF document text
    • http://mebotus.mypressonline.com/landscape_archaeology_book.pdfIn PDF document text
    • https://xopusinad.weebly.com/uploads/1/3/1/4/131406491/zefowogisakoxajol.pdfIn PDF document text
    • https://navikeput.weebly.com/uploads/1/3/4/7/134755574/mazegegotuxejupekoz.pdfIn PDF document text
    • https://cdn.sqhk.co/runetonorox/aIQtQ7W/damn_delicious_blueberry_pancakes.pdfIn PDF document text
    • http://tijukilebag.getenjoyment.net/napapatalugisubifujon.pdfIn PDF document text
    • https://cdn.sqhk.co/rekutadis/hhihjb5/gitedunelopenobubimaru.pdfIn PDF document text
    • https://pikoxujedogusu.weebly.com/uploads/1/3/4/6/134665618/nefiragit.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/jgkbPgf/dark_hero_party_ending_4.pdfIn PDF document text
    • https://rasiwumuseb.weebly.com/uploads/1/3/5/3/135350461/fixagep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/najubu/42094388492.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/15393923301.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/compulsory_reporting_guidelines_aged_care_providers.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/39257471688.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_off0000f0ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CA 5652 bytes
SHA-256: 048a285dc46f7f61246ebe8a84f9a655c4695f3da0fb6659beb4f7c5057ddd4e
font_01_sfnt_off00010421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10421 11196 bytes
SHA-256: 9a86ff154f1134b7d8799efc1ca3862b47682bc9feef8648584d38a984e9c427

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