Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9ed796b545ec3b1…

MALICIOUS

PDF

86.4 KB Created: 2020-11-30 16:39:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: b8cc7bb39976768e527872b6bc29c5c0 SHA-1: 178efd208a71f15ab81cd6b2333f20ac1c4f1e30 SHA-256: a9ed796b545ec3b13c05ad975157dad208fb3b96977a9963a2f388cddf58e0ae
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to exploit users by directing them to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffe.ru/strik?utm_term=japanese+technology+after+ww2 PDF link annotation
    • https://fojumujitugesi.weebly.com/uploads/1/3/4/6/134688065/juzemolemu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371800/normal_5f979c01ba452.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393346/normal_5f900a9c77f52.pdfIn PDF document text
    • https://xokafewapi.weebly.com/uploads/1/3/4/4/134488510/4147608.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368226/normal_5fc1448400143.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372378/normal_5fb47964441eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451955/normal_5fa6a89e5d25b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc2983b9955c744b5466208/t/5fc39d1b173fb5383b12214e/1606655261315/55105017289.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77ff0e09-064c-4a1b-8946-ef5b9140f398/79100785840.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1c322e1-0651-40a1-80d1-2257b85adf0f/durga_suktam_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e742cabb-8966-4ec4-8a07-b1793ff2c6f2/elite_dangerous_void_opal_mining.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb8b7755-be25-4a8e-8c56-d74e4e4d619a/xoveperisulabowodilujofuw.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE34 6700 bytes
SHA-256: b52714aa977ccf00fcd36ecf9fbb5fa4baeec96527b9e0433c6a2589c009af26
font_01_sfnt_off000114d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114D6 5592 bytes
SHA-256: 0328fab699e8381bfc0a2197860d6ca1e364ef93101429d36e0234eeb5e3c854
font_02_sfnt_off000127fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127FB 10844 bytes
SHA-256: 3e6643e92fb1edbfbe40c80d483fb341c14a00d15cf1cb970d6ebf96cef8ca94

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