Malicious PDF — malware analysis report

Static analysis result for SHA-256 0373029792edf8f2…

MALICIOUS

PDF

85.6 KB Created: 2021-01-22 23:21:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 834b01f57c3045de610c8ba5baa7271a SHA-1: 78f003e1ac513c3a9ca2966bcac123eb1948b6d8 SHA-256: 0373029792edf8f2efaa9bb849918ebc44aa18fd2ad6afd7c3b8685a063eea53
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'seumenha.ru', which is likely part of a phishing or scam campaign. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to trick users into visiting a malicious site.

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://seumenha.ru/aws?utm_term=bsc+agri+online+form+fees PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4466996/normal_5feccb3de4914.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495262/normal_5fc6f851a4c8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457881/normal_5fe810147fb75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380699/normal_5fe92386b5c2f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446772/normal_5fc7c9c79c977.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374178/normal_5fe16cb384907.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389606/normal_6009225b25eae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467573/normal_5fc6d70300de3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419452/normal_5ffce2676cf62.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445733/normal_5fc9163e9ca5b.pdfIn PDF document text
    • https://cdn.sqhk.co/fulaxanew/eMeijaR/12444390755.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387235/normal_5fdb2bc6b8e43.pdfIn PDF document text
    • https://cdn.sqhk.co/siloneza/Ngejcja/how_should_likert_scale_options_be_ordered.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475588/normal_5fe691bf1bc37.pdfIn PDF document text
    • https://cdn.sqhk.co/pibegufuxova/hhhhjD6/logo_quiz_answers_level_361.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403417/normal_5ff36f5717af3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484993/normal_5fdb7f0d8b6a8.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/juzewojavomofew/adobe_suite_cc_2017.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_off0001104f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1104F 5252 bytes
SHA-256: a7ee44b435b287255eb39f857ae1124f98341ce35bb36a05bce767bd7e7bb544
font_01_sfnt_off0001221d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1221D 11108 bytes
SHA-256: 871723f6398b303f97b3973ac670bee616490fb275a16d61585504c9d0429067

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