Malicious PDF — malware analysis report

Static analysis result for SHA-256 556309ddd37971c3…

MALICIOUS

PDF

64.1 KB Created: 2020-12-20 00:19:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 261abd05dd980d582da2deb5dcf48530 SHA-1: d09e300bac0a907cd25b90b60dade3fdd1284fed SHA-256: 556309ddd37971c3453812e1078e732b035512c2353cf5af0fc87418594a6a49
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, which is designed to lead users to potentially harmful content. The embedded URL and the ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://gettraff.ru/strik?utm_term=super+mario+64+rom+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4450733/normal_5fdb38a7858e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447447/normal_5fd1e6e6e2f90.pdfIn PDF document text
    • https://baxelawinojiw.weebly.com/uploads/1/3/4/3/134333718/9140614.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407571/normal_5fa0e932d052f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370528/normal_5fc612ee23fe2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367920/normal_5f8954b52ae0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454171/normal_5fa7b2e6452b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424682/normal_5fd0588fa421c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371004/normal_5fc40e3e9ca18.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://static1.squarespace.com/static/5fcec5c94f0831169e73c6a3/t/5fd21b2feeaf2774ac94d5c2/1607605039496/zombie_shooter_2_game_download_for_android.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_off0000af9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF9B 5164 bytes
SHA-256: 10284020abd03bcd6a20df019437ec3c1721d3cd9ef21980ac5e2013929f5927
font_01_sfnt_off0000c113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC113 10812 bytes
SHA-256: d89b549235527a0c1fc2240f628f9ac94e9d20f2dad57a51bda21a242db7ff47
font_02_sfnt_off0000e61b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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