Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6a9bf781d4232a5…

MALICIOUS

PDF

66.7 KB Created: 2021-01-10 17:53:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 3548928c014069ed6d0d4263a6db56ca SHA-1: fecf8fcaaa6ecb74e8e4acdd2eccc7bf18ca97b1 SHA-256: f6a9bf781d4232a50515955ac05e433e59ba23c0708a9085592127b688583da9
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://cctraff.ru/123?utm_term=grammaire+progressive+du+francais+pdf+avance'. This indicates the document is designed to lure users to a potentially malicious website. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests a phishing or malware distribution attempt.

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://cctraff.ru/123?utm_term=grammaire+progressive+du+francais+pdf+avance In PDF document text
    • https://cdn.sqhk.co/numokafas/4ojjDji/zulorusedope.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366337/normal_5f875194d1903.pdfIn PDF document text
    • https://cdn.sqhk.co/zivuzigup/iDUK9hi/momawiz.pdfIn PDF document text
    • https://cdn.sqhk.co/dodamewope/jjgiPjf/xiten.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382790/normal_5f91b7a6da767.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370057/normal_5fd09f3be8792.pdfIn PDF document text
    • https://site-1177546.mozfiles.com/files/1177546/kimodok.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/pubopelej/dictionnaire_maritime_franais_anglais.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/pipasuxamipu.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/carnarvon_petroleum_annual_report.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_off0000c579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC579 5536 bytes
SHA-256: dae9c5b6aa2b8f6753c2174c93144118b0b078b3aa03fb0a4de6539f4438e88d
font_01_sfnt_off0000d841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD841 10848 bytes
SHA-256: 6ac3f44f4ece85fda4a56cc87d6c4212358f3daf7183f38f90678b7148fb9a0e

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