Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f1441007bee7597…

MALICIOUS

PDF

84.4 KB Created: 2021-02-21 20:17:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5e6282e97df635d0fc2090eb865c703e SHA-1: 946568c6ef7dc5d7310fbf682993ff56b833b5ec SHA-256: 5f1441007bee759711b4823870d45c5d6fae4cf469a7ef48547b025c78ad9123
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 0.9998

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://maypoin.ru/aws?utm_term=2013+dodge+avenger+se+v6+review PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4465694/normal_6001c0203ba07.pdfIn PDF document text
    • http://agencymedia-ig.com/jufefajefanamisazazvcb12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367944/normal_600e22c9ce866.pdfIn PDF document text
    • https://cdn.sqhk.co/riraxizilob/ihuPP39/vitevibalozifinafe.pdfIn PDF document text
    • http://www-sfr-fr-monespace.com/vomavazoteradevawaxoru7o3ni.pdfIn PDF document text
    • https://cdn.sqhk.co/jogeguzotire/egg6cpO/alan_hangover_baby_shirt.pdfIn PDF document text
    • https://cdn.sqhk.co/sedazozesufu/Ojfjaig/lenaxasafom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472773/normal_600d5b6f1ee97.pdfIn PDF document text
    • https://cdn.sqhk.co/vovomafejuwa/dqgjixw/video_collage_maker_for_pc_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4504870/normal_6000d1ea847a9.pdfIn PDF document text
    • https://kokejegifuro.weebly.com/uploads/1/3/4/4/134477846/tetewufuvixif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370264/normal_5fe5054322911.pdfIn PDF document text
    • http://fanexaxujuto.22web.org/management_system_template_free.pdfIn PDF document text
    • http://domensita.fun/kansas_gas_service_phone_number_to_pay_billlp5dk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://doxinaxa.epizy.com/54736213739.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/34464938137.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/fundamental_electrical_engineering_questions_and_answers.pdfIn PDF document text
    • http://zegifuf.epizy.com/linkedin_summary_template_for_hr.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/archeage_leveling_guide_50-_55.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_off00010cb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB2 5660 bytes
SHA-256: a56d0ed1c7416fe436df2bf9de4c2253f74574176ff3515459bae3ba7e1113f5
font_01_sfnt_off0001201b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1201B 10636 bytes
SHA-256: 932015168688ba1a2b30c7c5312dc3ee4a2e8fec5670aebb6b8ebf6a15496846

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