Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9d4e1e54357549a…

MALICIOUS

PDF

58.8 KB Created: 2020-11-25 22:43:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: bc04a46f9e6da1d7231836323f8427f7 SHA-1: 1bd362e6d324a0e78eaf60c6c8156b4e974e5908 SHA-256: f9d4e1e54357549ac5772b4c8b3fa427eeee7fa6b637ee1c0d864414208c431c
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://traffmen.ru/123?utm_term=m79+grenade+launcher+toy In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387920/normal_5f971d3ec00b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404113/normal_5f9b95eb8ffcd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383149/normal_5f90a6f0d1a1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393624/normal_5fbbf65c8d8e2.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/susopuzupure/nigexuvunisel.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/36663402699.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dd5a2dc-2559-415e-959c-df3fe0ca9731/wevevizamovuzojunoxaleva.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/rectangular_inground_pool.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/ge_spacemaker_microwave_oven_manual.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_off0000a809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA809 5368 bytes
SHA-256: c0c4eede452a83c54716fb019ee0b3f244416e1c194969d87e1610e74834c740
font_01_sfnt_off0000ba64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA64 10440 bytes
SHA-256: 88b7d1fcb59d8621b221a4c2cd76bee2aad6c8b8c7fc8cd62dfbd5b886cf4ade

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