Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3ffa52d97dad511…

MALICIOUS

PDF

89.2 KB Created: 2020-12-31 15:47:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f14a7612186ab9da5cea404755adb0d3 SHA-1: 87ab9c15a50448a9558c7fd24e437459679f2884 SHA-256: c3ffa52d97dad511226749b15a824b0e2ab80242486b3208f1fe0e59ca2b05c9
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 'traffmen.ru'. This URL is likely used to lure users into a phishing scheme or download further malicious content. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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=two+dots+above+o+latex In PDF document text
    • https://revugegan.weebly.com/uploads/1/3/4/6/134682990/7597939.pdfIn PDF document text
    • https://barijimuje.weebly.com/uploads/1/3/1/4/131406344/9529670.pdfIn PDF document text
    • https://letolonenuxe.weebly.com/uploads/1/3/4/0/134095956/jibusexefufo_rofotur_zopetufurim.pdfIn PDF document text
    • https://lataladegizozav.weebly.com/uploads/1/3/4/6/134685495/nuzopomaxa.pdfIn PDF document text
    • https://cdn.sqhk.co/lixejudazeza/gijhfie/call_of_duty_warzone_zombie_rat.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/pomaxa/xaposopupitanaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfcd2c66-02bf-48b8-88c9-0248d1437046/contract_termination_letter_non-renewal.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/french_horn_sheet_music_harry_potter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8379932-f062-4f0f-aa6a-f94d61599c96/wedomurakenizusu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/383e1a03-21ef-4e61-93ed-df093b1cb25b/honeywell_lyric_2nd_generation.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_off0000f853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF853 4668 bytes
SHA-256: ef78138ace50c321c6bc6ade3159489aa6ea4bbaef68fdcbda2df6f6a38a6485
font_01_sfnt_off00010858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10858 13972 bytes
SHA-256: 8c1551a343874370b38f28742106cfc4c6931b00d0d04efa4da17c0c14ccdfc5
font_02_sfnt_off00013504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13504 16072 bytes
SHA-256: e02a88d9599712d873514dbcec8653059ead18a1e44b795828ff7943e65f13a1
font_03_sfnt_off000149a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149A3 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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