Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fdc1167fd7c2e04…

MALICIOUS

PDF

72.5 KB Created: 2020-12-23 01:12:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 384a85064cc9f84bf7dadaded48c8c82 SHA-1: 98a7b6bdaed37c377a2464b09a3bda297c92515c SHA-256: 5fdc1167fd7c2e040f2183eaf901a8a58b9b54055b17ddead451a85f2f932236
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 'https://traffine.ru/aws?utm_term=airplay+smartphone+android'. This indicates the document is designed to lure users to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient to infer a phishing or malware delivery attempt.

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
  • 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://traffine.ru/aws?utm_term=airplay+smartphone+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4456377/normal_5fd63cbd15c9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499653/normal_5fd9c9cb5d87f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380209/normal_5f8d3cd92b592.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493266/normal_5fc562ca6e070.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428061/normal_5fa50ff1db6e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393883/normal_5fe278873c1b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374851/normal_5f957564dce20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456982/normal_5fce7900c8a3f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lorifumofelu/free_bangla_golper_boi.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/bazaar_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/76822302151.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/18116845380.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/manual_smtp_test_authentication.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_off0000d28c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD28C 5076 bytes
SHA-256: 81c93654c052d4dd67f68465e4d6bcd37c14036f9d7798f488f126452c23d416
font_01_sfnt_off0000e399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE399 10544 bytes
SHA-256: 3aca32cd8f904b4a30e1bfd266ebaa34526b2aa18d01a7f2bc83d002f3d3197a
font_02_sfnt_off00010783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10783 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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