Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3ca59b39e4a19a3…

MALICIOUS

PDF

77.3 KB Created: 2020-11-17 19:49:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ade7b751099915375f8f520e526294af SHA-1: bb8f03e512d7aa45f342299f1e5431927a575d48 SHA-256: b3ca59b39e4a19a3163cc1e09b12cd4911b386799426578b9c7b0c98bdec3b1f
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/123?utm_term=cascadian+farms+granola+bars+recipe'. The ML classifier also flagged this PDF with high confidence. Although no scripts were explicitly extracted, the nature of the redirector suggests an attempt to lure the user to a malicious site, consistent with phishing or malware delivery via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/123?utm_term=cascadian+farms+granola+bars+recipe In PDF document text
    • https://cdn-cms.f-static.net/uploads/4415077/normal_5fa5419ac7a5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392853/normal_5f9639184b2fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374703/normal_5f89973314f60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392442/normal_5f90f1f1860d3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/af809fd0-b152-4165-a1e7-180a6e2020e2/62391980071.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/polotosofesegapigixo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cbd389b-4fba-483c-a211-9fc179e8804d/posafawegexafozife.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/letter_from_birmingham_jail_rhetorical_analysis_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e8ebc73-5b1f-40e4-b3a8-1c0190d389b0/punuvegud.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/bolls_and_branch_bed_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/645a78c6-bafe-4ace-9568-8386384e2feb/teroluvaralite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4f461ee-a838-4f37-9df0-8771b75a8157/mount_and_blade_warband_guild_master.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/fundamentals_of_accounting_philippines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c05ba64-b56a-44dc-8073-43a7c3fd565d/86764329510.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/acta_constitutiva_de_una_empresa_automotriz.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
    • 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_off0000cbea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBEA 5348 bytes
SHA-256: d4106825987992f42d47a2abeca931223f18132ab978dedafee2cf8898b246a3
font_01_sfnt_off0000ddeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEB 10968 bytes
SHA-256: 3f7963b8cd1dd64c4048d4b10cc878f4e5a0563a6ed3e96de87fe915556d3af2
font_02_sfnt_off0001037a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037A 16376 bytes
SHA-256: 684a3c196e802b4dc45ee85e0d12f41c83d6b6c6a55a83cec5fb8e332ee9aa36
font_03_sfnt_off00011922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11922 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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