Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4ea4a6ebe6d1d04…

MALICIOUS

PDF

71.5 KB Created: 2021-01-13 22:54:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3e8df092e975934a5ab39ffa9f4de2f2 SHA-1: 79fc2740ed902e2e048d1a59d40709f27b11dcc6 SHA-256: d4ea4a6ebe6d1d04c2664275309b47775cd66bce17103f201725447013fad285
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, and contains a critical heuristic firing for a malicious redirector link. The embedded URL `https://traffmen.ru/123?utm_term=new+holland+repair+manual+pdf` is the primary indicator of malicious intent, likely leading to a phishing or malware download site. No scripts were extracted, but the presence of a malicious redirector in a document disguised as a repair manual strongly suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9862

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=new+holland+repair+manual+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375541/normal_5f8b165f41c8f.pdfIn PDF document text
    • https://zadavutuni.weebly.com/uploads/1/3/4/3/134343582/pimewowaximaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490251/normal_5ff4bbea8cce5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452217/normal_5fca0b9dccc61.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/uy8pghp/super_wings_jett_run_mod_apk_2020.pdfIn PDF document text
    • https://rofosuvobatijam.weebly.com/uploads/1/3/4/6/134661532/cdeae955bfb1.pdfIn PDF document text
    • https://site-1173302.mozfiles.com/files/1173302/games_cheat_codes_gta_5_ps3.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/bejexe/aviva_company_email_format.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_off0000d90b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD90B 5164 bytes
SHA-256: 3a310dce5a2911a4d0574a16250886b87ad2c11b8e87c8e8578af46a91956906
font_01_sfnt_off0000ea8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8B 12752 bytes
SHA-256: b82e3221e12294f7b902d05343581b5d7a8b17becb74ba9e82f12828f24a1dff