Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb2606e6df4db163…

MALICIOUS

PDF

58.1 KB Created: 2020-12-15 13:00:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: dabdee21e213e6c5c1be09bb765b7a8c SHA-1: e965d3f2fd8f66a30670b4cbfb5072b51190017d SHA-256: cb2606e6df4db16352a67da339de7332c39fd7c1050d3b184abae32d68b7689b
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 'traffmen.ru'. This, combined with a high ML classifier score and ClamAV detection, strongly indicates malicious intent. The document body is heavily obfuscated, but the presence of embedded URLs suggests a phishing or malware delivery 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://traffmen.ru/123?utm_term=brs+physiology+5th+edition In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc2973917e7202640f4fd6f/t/5fcba5f29cf56e0e8b15db7b/1607181810876/zombie_killer_shooting_game_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0edb38787e879896c1e26/t/5fc552497acac6192a7219cd/1606767178032/mixujilu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c362403f5353fd950a5e/t/5fd0d9c6a91a8d2433855dbc/1607522758688/nisebebepezitupenasegi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d7ac403f5353fd956fc5/t/5fc11397173fb5383bc832c4/1606488985117/pathfinder_size_modifier_grapple.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc103f2c6d964583622cf33/t/5fc90040988c553a80fec60f/1607008322503/car_simulator_civic_city_driving_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/gedogizejula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e61d631e-c9ad-4f5e-bdef-42366857ff2f/65625402418.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/tamagelibavabofegu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4d432dd96f5918e4fcda/1606372683853/98217406811.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/45556653149.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/845527515.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_off0000aa7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA7E 5284 bytes
SHA-256: 79fa35d61fa540be76e9231badb588e2d643e9ad7cf22c2bb837f8e5cde348e5
font_01_sfnt_off0000bc7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC7F 9288 bytes
SHA-256: 1ec1f38f6b388d34917caa556dcb706b009511766a251dc6cfe4457da78d3bcb

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