Malicious PDF — malware analysis report

Static analysis result for SHA-256 262dfa22e94ab352…

MALICIOUS

PDF

77.8 KB Created: 2021-03-18 00:19:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 12d7866138c8a421d2b625aad01ac1e8 SHA-1: 9dbdb764c0d5a198989c8cb14f8054beeb5df59c SHA-256: 262dfa22e94ab3520ac0e3d2cef7b598b8e7c10d32119538cdcf033e5a22450b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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://leonvi.ru/award?keyword=matlab+matrix+tutorial+pdf PDF link annotation
    • http://ibkreactiva2020.com/logical_reasoning_questions_for_clatfhbzf.pdfIn PDF document text
    • https://cdn.sqhk.co/gixegusu/1EhihiZ/57413785912.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495536/normal_603bd62b59fa8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447915/normal_6048fa3010b59.pdfIn PDF document text
    • http://lnstagram-helping-centre.com/how_to_study_for_drivers_ed6txxu.pdfIn PDF document text
    • http://firstreadersclub.com/stochastic_calculus_for_finance_ii_continuous-time_models_springer_finance7ya1a.pdfIn PDF document text
    • http://gadosamu.iblogger.org/amana_commercial_microwave_parts_list.pdfIn PDF document text
    • https://cdn.sqhk.co/sogefuluf/m3E7hhf/58447867059.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482206/normal_6019cd49577bc.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/jiLLaEK/93759812331.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454824/normal_6048bf53315c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455670/normal_6008a37de28cb.pdfIn PDF document text
    • https://cdn.sqhk.co/vuritukupus/hzHaPVn/walovojudi.pdfIn PDF document text
    • http://firstdoctor.xyz/51505836125py02o.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wejivitekep.epizy.com/xininofoseso.pdfIn PDF document text
    • http://fotopokidag.epizy.com/95600032577.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a791cc7f-b4d0-4f9c-8c2c-6f684eb0f536/what_is_the_best_self_help_book_for_depression.pdfIn PDF document text
    • http://rodaselawowov.rf.gd/relagifiborevuvido.pdfIn PDF document text
    • http://nazonuretowu.epizy.com/54554534788.pdfIn PDF document text
    • http://tobezizasatixib.epizy.com/oh_danny_boy_guitar_sheet_music.pdfIn PDF document text
    • http://fututajadijet.epizy.com/titujoludatobisajibubiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38989d31-3b8d-40a9-8bef-422d447e48bb/2005_suzuki_boulevard_c50_service_manual.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_off0000f019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF019 5220 bytes
SHA-256: ab3350e9e77c3af231f7a59eb733d55474db92f61ee17fec7a6aa016c820b4e4
font_01_sfnt_off000101cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CF 11692 bytes
SHA-256: 41bed494e6e318b2d87bb6e9f4fcdd85909a83d5d608f33b29202e37d83d6047

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