Malicious PDF — malware analysis report

Static analysis result for SHA-256 083f931388b69a4c…

MALICIOUS

PDF

63.6 KB Created: 2020-12-19 04:41:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d8753797e804f0570b9d16f13502226f SHA-1: 186d29503012bf7463dc04955db5c6023b9a78c5 SHA-256: 083f931388b69a4c1e97f8a9d662ccdd1f5c4d5cd154c19dce5c5dfb91e0ad8f
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were extracted, the presence of a malicious URL and the overall detection suggest the document is designed to lead the user to a harmful site, likely for credential harvesting or further malware delivery.

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=network+topology+ppt+slideshare In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370278/normal_5faecf2e4e32c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f8cf1ca0ddae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421365/normal_5fbede382aedc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b4d4289-d137-4d0a-bb80-e765fa03719d/46728844086.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d4c78139af037644e8c4/t/5fc1cda89ee0f32b87957a9e/1606536616722/the_wealthy_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea4b05c0-1b0d-4677-9d02-251568e05fb0/blank_tournament_bracket_4_teams.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/blank_aadhar_card_hd_images.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc177dbbf71053ccb142dd9/t/5fc8b6d4094cf7617dc74600/1606989528316/snappy_tomato_pizza_menu_seaman_ohio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/234ac9c8-5a98-4749-8d3f-2db889c8eef3/menagujinadaret.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc052d83dfdd95b60d21819/t/5fc175809d79364840c4b156/1606514052369/kowaninutuza.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_off0000be65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE65 5448 bytes
SHA-256: ac07522f1637334ce773b721c75d622819112cc365874cd4c61071abedbc2440
font_01_sfnt_off0000d107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD107 9692 bytes
SHA-256: 1c30341eed7143f84de062dd4cb08656d67f3d8772e1d93f23ee277b7adcc6e2

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