Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c79ba3816b6312c…

MALICIOUS

PDF

61.1 KB Created: 2020-12-23 18:55:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 291230e65289f47f60b600b757a72598 SHA-1: 1c5801d6a1896f1479129724ddaf09eeca346c47 SHA-256: 2c79ba3816b6312cd192efe08e70a47a62a6f54146076217651aba482ff0282d
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 indicating a malicious redirector link to 'https://gettraff.ru/strik?utm_term=crossword+clue+long+french+river'. This, combined with a high ML score and ClamAV detection, strongly suggests a phishing or malware distribution attempt. No scripts were extracted, but the presence of a malicious URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://gettraff.ru/strik?utm_term=crossword+clue+long+french+river In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413363/normal_5f9723250b8a2.pdfIn PDF document text
    • https://cdn.sqhk.co/ratugetaj/EahasDH/glow_hockey_2_pro_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/lutaxudepoje/x0ijheK/jixubajuxedixi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413362/normal_5fe018f6c1c08.pdfIn PDF document text
    • https://vixijusodu.weebly.com/uploads/1/3/0/7/130776714/vubejaxisasaxem.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://s3.amazonaws.com/tesasubawalozan/breast_screening_guidelines_high_risk.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/93412140277.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e7d5eb4-724d-497a-b657-35d789fad1f4/fookin_laser_sights.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/modabakifowijomonokozuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4a2478b-1060-45ad-aea4-b8b65b50ae49/burning_magnesium_ribbon.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/sk-ii_facial_treatment_mask.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/hdfc_life_sanchay_plus.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a7d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7D5 5052 bytes
SHA-256: dbf676819147cd0979521c652652703e71ca114f7068d3c1e4efed975bb91ad8
font_01_sfnt_off0000b906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB906 9616 bytes
SHA-256: 6b6f8ff9298d5db1a907ce13e5a03f7bf41768508a8169b76bf1c2340e0f4e53
font_02_sfnt_off0000d9f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F4 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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