Malicious PDF — malware analysis report

Static analysis result for SHA-256 08a25e7dc4899a64…

MALICIOUS

PDF

80.3 KB Created: 2021-02-26 19:49:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3c93e78b7fe313085dac5080c3e9fe17 SHA-1: 9bd290770219febc8ddedcb8f2939031f54dc3b4 SHA-256: 08a25e7dc4899a6422b8d91fe4e531b91b0992dcc7a5389784af3b40ca288774
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=bears+beets+battlestar+galactica+shirt+romwe PDF link annotation
    • https://cdn.sqhk.co/deloreba/yidLAz8/cheats_for_gta_v_ps4.pdfIn PDF document text
    • https://cdn.sqhk.co/lomasamube/gLjdsR5/1281156272.pdfIn PDF document text
    • http://afracheat5.xyz/zetefojojapkx9x.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496193/normal_5fc6d49bbdf60.pdfIn PDF document text
    • https://turudesufexo.weebly.com/uploads/1/3/4/1/134131379/4c26ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377098/normal_6009067bec2c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414352/normal_601d8856b475d.pdfIn PDF document text
    • http://ryukzak.digital/twitch_guide_runeszb1p8.pdfIn PDF document text
    • https://cdn.sqhk.co/xewafazuk/Cheghe9/game_ninja_and_zombie_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446045/normal_601faeb9acf9d.pdfIn PDF document text
    • https://bowiromifax.weebly.com/uploads/1/3/4/6/134613330/tunujefejopew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449603/normal_602071f0c814b.pdfIn PDF document text
    • http://how2clever.com/galvanized_iron_sheet_unit_weightual1c.pdfIn PDF document text
    • https://jomitapekox.weebly.com/uploads/1/3/4/3/134319499/c4aba.pdfIn PDF document text
    • http://wisitens.online/introduction_to_criminal_justice_by_bohm_and_haley_9th_editionehi40.pdfIn PDF document text
    • https://cdn.sqhk.co/vimerokil/vHTictJ/korexumizetumokezaxugil.pdfIn PDF document text
    • http://igcopyrightclient.com/surah_al_waqiah_banglajqq8q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366004/normal_5ff7edef2d8ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366622/normal_6029849644eac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d76a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD76A 5496 bytes
SHA-256: 0d696450bdd9dc88dff5775aa4df01bcf8cef59ab33c33bc6ba10382f67bb3d2
font_01_sfnt_off0000e9f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F8 3820 bytes
SHA-256: 5ae43e030e6013ddb5985d3be5af391793d6c63b72e1b717caaede2aa1aadb69
font_02_sfnt_off0000f48a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48A 10628 bytes
SHA-256: fb2cec2fa547e55ec00d120bd5e7a64dec043717cae0a742907b775a2c48e770
font_03_sfnt_off00011907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11907 16884 bytes
SHA-256: d61542198bf0049bb635890ff53fe2642949c396c058bd20bc5239aaf3580d81

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