Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ea4b40a73939203…

MALICIOUS

PDF

73.2 KB Created: 2021-02-16 10:52:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: aaa92208095f84ca3e50584fe04baaac SHA-1: 4b49045f1a7541f9a7fc9b394d385d84df2f32e2 SHA-256: 0ea4b40a73939203ab087e4f60b3a6df6d8c27fb0a39f42fb016dccb00649b1b
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'seumenha.ru', which is likely used to redirect the user to a phishing site or download a secondary payload. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

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
  • 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/wix?keyword=african+american+plays+in+los+angeles PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365659/normal_5fd2f6e954abf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481155/normal_60083ca0259ac.pdfIn PDF document text
    • https://cdn.sqhk.co/pikevasoze/cIerifT/white_yellow_pages_reverse_lookup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376870/normal_5fcdb2ba267a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387035/normal_5fc85f639d6e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417024/normal_5fd63855a6d52.pdfIn PDF document text
    • https://cdn.sqhk.co/butiluluvuk/Xq6NIhd/dofogipomatudazizitev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393521/normal_5fd2745fc24d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375350/normal_60033597aa493.pdfIn PDF document text
    • https://bigififipajug.weebly.com/uploads/1/3/4/7/134709095/wovalubo.pdfIn PDF document text
    • https://cdn.sqhk.co/loxowopiv/X7hfjf1/freeway_ford_denver_used_cars.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/sagotomagin/account_manager_apkpure.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_off0000e29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29E 5428 bytes
SHA-256: 40cd6a63f1a3135f09070aeec9c20729f2835b5d8319362cb8c711d1a5b952d7
font_01_sfnt_off0000f50f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50F 10220 bytes
SHA-256: aea017b466cda4bc04cf94a8a5772e0686339b1ecdaf35060ab1ad5fe094c95a