Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba2034922ab9cda6…

MALICIOUS

PDF

94.0 KB Created: 2021-03-29 01:20:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 185a005a1ba1ec9f2a3d20931b5446cb SHA-1: 1c4b08b73f2cb8da792a9bec574efea7e863da36 SHA-256: ba2034922ab9cda6214aa58aa20348bca4bd339a634d497c3f2ce19d8b77ea30
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 0.9997

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://ponafet.ru/strik?utm_term=ap+human+geography+chapter+11+agriculture+notes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417141/normal_60141bc68ce8f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410674/normal_5fcdcf865e92a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447662/normal_605f5841b00c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408343/normal_604d32d713c25.pdfIn PDF document text
    • http://bokifov.iblogger.org/nifage.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424696/normal_6040b042b331b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495385/normal_5fe406819b74d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484835/normal_5fee33a428513.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420592/normal_6015b6ccc07d7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f421159b-d329-41e8-bc42-072bc93e4c50.filesusr.com/ugd/65d6f7_a5c874cf61ca42c0a5b6e55234039348.pdf?index=trueIn PDF document text
    • https://02796127-04ec-4c85-b270-c6f7310ebb18.filesusr.com/ugd/ce0e6d_5fe48c0fae5b4ee08322d0186ae7f25d.pdf?index=trueIn PDF document text
    • https://08c3cc13-1ce0-4add-927e-a3aed263473e.filesusr.com/ugd/ccf397_b2b94a6ca9a34462bca433aa9ed80e61.pdf?index=trueIn PDF document text
    • http://fotisojaz.rf.gd/english_job_interview_questions_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/general_electric_dishwasher_gldt696j00ss_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/ibn_rushd_books_in_urdu_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/fefumexudotesuzezeguvatim.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/what_free_operating_system_is_best.pdfIn PDF document text
    • https://78fc25e8-d533-4ec3-a480-3617e8cc0d4b.filesusr.com/ugd/aa5866_60d73b6bd8e945068da520b037ac1bc1.pdf?index=trueIn PDF document text
    • https://c1d61d78-9bae-425c-b347-ee91470fe4f1.filesusr.com/ugd/60933b_d5e68f324ca241679d77f1b73f094f77.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xirixepo/guide_customer_service_skills.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_off00012eb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EB6 5488 bytes
SHA-256: d2bad9328d6172b33e58b991c6a2358f8444b029d434a2f90e2b57c7607faf73
font_01_sfnt_off00014149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14149 11724 bytes
SHA-256: 5b7076238845baa0348e6849dd7884a86029c69c6224c61e3184fc7d21493413

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