Malicious PDF — malware analysis report

Static analysis result for SHA-256 3efee8dc5ab72503…

MALICIOUS

PDF

69.6 KB Created: 2020-11-18 04:20:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 30df5046e3ffc21f85b6ebef81ae3c61 SHA-1: afd5a87880d47c176b35c202cfb8f4048f80277c SHA-256: 3efee8dc5ab725033c0bb2d838d0767631ed1d67fc5fad0e781079f92c3c3b81
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 embedded content, though heavily obfuscated, appears to be related to the lure. The ML classifier and ClamAV detection strongly support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/123?utm_term=chilean+rose+hair+tarantula+diet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5f87864c3cc9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375503/normal_5f8a5261ea87e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378857/normal_5f8fadcf29f5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379744/normal_5f8ba1230293f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367920/normal_5f8befe2b2a81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408195/normal_5f95f66908019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387573/normal_5fafad1790dca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453888/normal_5fa1fa2ec7a08.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/zufojadibi/81361836659.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/34751703248.pdfIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/lacrosse_positions_girls.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/sql_formatter_plugin_for_notepad_64_bit.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_off0000d33a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD33A 4816 bytes
SHA-256: 86d69aa0bd0a1ed6b7d061e275620bd1ed4947c441a0ad1f39b49aa99fb479c5
font_01_sfnt_off0000e385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE385 11512 bytes
SHA-256: bc0e03a1ac6e0977b8252d0a268844c0c94178d05282effa8548ea54ae210f1d