Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dfcbf24e51c3508…

MALICIOUS

PDF

73.4 KB Created: 2020-12-17 03:27:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d9dc950541e9bfad5484da42e9e96f19 SHA-1: ea152c3174162c1cbcd0ee75e8b9b390e35357d9 SHA-256: 7dfcbf24e51c350899af54653af331031184d8867a37c4cfd080a6e8c90f3be5
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, traffset.ru, which is likely part of a phishing or redirection scheme. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/123?utm_term=gilbert+riparian+preserve+photography PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368219/normal_5f8ba12b9cabd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423133/normal_5f9c5db8bd613.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/jinabisura/pibapekuk.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/one_less_bell_to_answer_live.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/7_days_to_die_launch_error_23.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42646e2d-f57e-407e-8ab6-6424ccafa0e3/fisiologia_de_las_contracciones_uterinas.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/motojegajipumowadaxozalu.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/91245642318.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/80749262777.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/14676072201.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc013fe3398ff751529adbc/t/5fc159b74e98326c0242af01/1606506935524/mekibafaretozevodurivogut.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/etrian_odyssey_5_class_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea4b27fc-319d-4969-8fbf-1e04fa7bcd95/38321772035.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/92721413666.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/65021209564.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29253a3bf4b14abb3bccc/t/5fcf90c976f3eb1a46e8a97d/1607438539540/pictoword_level_346.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC07 5416 bytes
SHA-256: 2fe3cb5a95820e14c07b8a62f80596e145b9e802086f82dbc85d05c23ec944a9
font_01_sfnt_off0000de78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE78 10420 bytes
SHA-256: 4a2af7431b39d285400f4baca66ab30d782701ee0bab051baf73b0142d8d5bb1
font_02_sfnt_off00010274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10274 16204 bytes
SHA-256: 83b0f3ed90e545d6d36d14a1982d3fe7024877db6cf476e622725167f7eecf28

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