Malicious PDF — malware analysis report

Static analysis result for SHA-256 6837e6a50198513b…

MALICIOUS

PDF

74.4 KB Created: 2020-11-30 20:57:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 109b0b14168d1d64d4dc770c8d07d8d6 SHA-1: 0b72294d6bd81c8592cdfeb6ddee6b479c219d4c SHA-256: 6837e6a50198513bfb56c55ee8ef36b1b0a83d7b4007c75d0a3f188c47120156
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'. The document body, though heavily obfuscated, contains text related to 'Delaware license plates lookup', suggesting a phishing lure. The ML classifier and ClamAV detection further support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=delaware+license+plates+lookup In PDF document text
    • https://vikowawenoso.weebly.com/uploads/1/3/4/7/134744374/vigige.pdfIn PDF document text
    • https://fofupapezu.weebly.com/uploads/1/3/4/3/134356394/f33598df5.pdfIn PDF document text
    • https://getazaxebu.weebly.com/uploads/1/3/4/8/134866961/3501354.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/wesezuzuvalirik/baazaar_2018_movie_video_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/free_english_learning_audio_books.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/nc_iii_bookkeeping_reviewer_2018.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfd15ef3361272aec3c9c/1606221078930/37028733208.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7a777ae-fa0a-4adb-9197-506ee9f76699/vumozaraje.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc117cc3398ff75152f2ade/t/5fc2c4e63c02f22b9d6824bd/1606599912071/nubatadaviputogu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5d9f61d-7c20-4df8-83a5-462de657fbc1/13809121823.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ed1560f2895dc1e7fe11/t/5fc2ba5a3c02f22b9d668c84/1606597210858/bilarules.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5883e6d49a06bb8907da/1606375558215/57834271946.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_off0000e6d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D3 5084 bytes
SHA-256: 5dad87b766a2570c376eafe1bea0daea9e8774561b333eedc5c7e22eff87c9ca
font_01_sfnt_off0000f849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF849 10784 bytes
SHA-256: 49e33e22ead22fe81e4bb323443d430708d347cb62908b76bdc30526e3fa0795

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