Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dc397ba156d809f…

MALICIOUS

PDF

82.9 KB Created: 2021-03-17 17:29:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b5d90ee982ecab5b3be8d433188e0878 SHA-1: 20e26f9f3cb22293a02a6125da586d1c672aa42e SHA-256: 2dc397ba156d809f817bdc0ed6f16036dffe0fa344be9e70fe6a61391ada4553
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/wix?keyword=ronco+showtime+rotisserie+5000+manual PDF link annotation
    • http://fetizona.iblogger.org/11974479055.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447912/normal_6006721dda8e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387033/normal_6040a64e372fe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500911/normal_6001c8e13cc80.pdfIn PDF document text
    • https://cdn.sqhk.co/kogujipubap/e1jcgde/luzova.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/jjCg8hh/73826883648.pdfIn PDF document text
    • http://vawabipoxe.sportsontheweb.net/beatspot_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486522/normal_5fe0e1e62a25d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366336/normal_60477890de853.pdfIn PDF document text
    • https://cdn.sqhk.co/rivinodati/eif0yhe/buwufutexatabuwopaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suzogoga.epizy.com/design_engineering_report_example_gtu.pdfIn PDF document text
    • https://569e8712-2873-4b93-a654-ea71b6b809e3.filesusr.com/ugd/345929_648de860f934402c81ff2e007039bb27.pdf?index=trueIn PDF document text
    • http://telusomabufa.onlinewebshop.net/mathematics_grade_12.pdfIn PDF document text
    • http://zegiwewezenaro.myartsonline.com/amelia_bedelia_first_book.pdfIn PDF document text
    • https://507d1b22-ea03-4061-a262-f79425337ca2.filesusr.com/ugd/a374b9_86c8b017432e458ca85a68bc6e9fb6ee.pdf?index=trueIn PDF document text
    • https://55963656-6eb1-4b25-bcd5-bb835d65808b.filesusr.com/ugd/0064ae_fb1031725ac24f27a72a1a82871fb06a.pdf?index=trueIn PDF document text
    • https://41c240d9-b4af-4f88-8fa4-2a41cce3a287.filesusr.com/ugd/01bc73_aced7389f304454fbeedcca00245ef13.pdf?index=trueIn PDF document text
    • https://7f1d4f38-7308-4051-b389-b8ed31312188.filesusr.com/ugd/e948c1_a767bceeb78f4b6a8ca3e1e3971d9245.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED39 5404 bytes
SHA-256: 9bfa4c12400514bbd7e63d22632856a4223abadd5e4e3e09c243d36153e125ca
font_01_sfnt_off0000ff85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF85 11516 bytes
SHA-256: 023471b17f064308abe14c20bdc2bd736ea406bae587c029e76274c4ea8eef28
font_02_sfnt_off000126de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126DE 16596 bytes
SHA-256: 898aadf4a87146dace6350769ecb99185d203d9b0bc1e0322358d8ce54b06798

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