Malicious PDF — malware analysis report

Static analysis result for SHA-256 c04a461e1af97755…

MALICIOUS

PDF

66.1 KB Created: 2020-11-29 14:52:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 03148d00f80d0463b509b404fb10f5cd SHA-1: 041c286f3189f5cda7eda148efae0e00d7ab0923 SHA-256: c04a461e1af977555fa23230396be63a0f95a920082bd47ed183ca3307f9042c
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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/strik?utm_term=craigslist+mpls+st+paul'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=craigslist+mpls+st+paul In PDF document text
    • https://cdn-cms.f-static.net/uploads/4406806/normal_5fa43aa7a998c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491946/normal_5fb0378773455.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380226/normal_5fc2805552d78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374976/normal_5f8aaab94de72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384634/normal_5f8ecf742d837.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/libosokune/bayley_scales_of_infant_development_free.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/82019695594.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/business_writing_today_natalie_canavor.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/20669254720.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/basara_4_pc_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/hashar_song_status.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/fixed_asset_management_mba_project_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca3a5c3a-5a8d-46ba-83dc-c4cab2d0bde7/7739405773.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/application_form_to_renew_passport_uk.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

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC544 5044 bytes
SHA-256: da1fc99d5c826b8dbbbbdd58d3b3e3d2bb6ac0b85eb20941f405f4c6c282e551
font_01_sfnt_off0000d654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD654 10424 bytes
SHA-256: 52ea00cfa0441a447e2d52531a40cdcc9f527a470eb2e11c90fd98788b7f093f

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