Malicious PDF — malware analysis report

Static analysis result for SHA-256 c337118cd37a65d9…

MALICIOUS

PDF

80.6 KB Created: 2021-01-08 16:26:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 73475ec1eabd5c5b1e74e40dee49e456 SHA-1: dee1c0a175bef9b989b32f3a53604e5f017a234a SHA-256: c337118cd37a65d9f39e73b15ecf0489f5bc0b365feb22ad45148a179d90ec5c
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URL point towards a common attack pattern of luring users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffine.ru/123?utm_term=dorian+mode+guitar+chart In PDF document text
    • https://cdn.sqhk.co/damukowabij/xhjohcB/pdf_document_scanner_ape_apps.pdfIn PDF document text
    • https://cdn.sqhk.co/lozuzupadis/6axBIid/vector_full_game.pdfIn PDF document text
    • https://cdn.sqhk.co/velujuvaxal/2458rP4/44688186358.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/fodose/62900425348.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/nopoxusitulaxima.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/sowufuremo.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/39933661797.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/excursions_in_modern_mathematics_chapter_2_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/android_tv_app_store_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/email_templates_for_sales_and_marketing.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/19819129004.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_off0000dcdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDB 5024 bytes
SHA-256: c13087a76f00c209b1653da8a8ed91cedfc3285b5293df54a2685a46617bf595
font_01_sfnt_off0000edba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBA 10552 bytes
SHA-256: 2ae69b0828a0f1513e42c4d9d72b26a1829af9ade0149ef168aee81fded56331
font_02_sfnt_off0001122d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1122D 16164 bytes
SHA-256: c911266ee94d3c84babd7d7f43c4632a9d09919247d03659176d84cc29aaf82d
font_03_sfnt_off0001274c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1274C 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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