Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbae95a5d7245807…

MALICIOUS

PDF

61.6 KB Created: 2020-12-21 04:51:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4513c2ef8ef24310edbeca73b59f3fe9 SHA-1: b8b3cfcb2425b8e8f1db2cc2d8c6ca189aa1013b SHA-256: fbae95a5d72458071797ae4b254f5227c9a7790fccdecdae24a42db8c0cc6736
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://traffmen.ru/strik?utm_term=fist+of+fury+3+youtube'. This URL is likely used to redirect users to a malicious site for phishing or to download further malware. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing and redirection intent.

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
  • 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/strik?utm_term=fist+of+fury+3+youtube In PDF document text
    • https://xusalowaxagus.weebly.com/uploads/1/3/4/4/134481150/bewixazobume.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376404/normal_5fdbcdf534308.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369774/normal_5f9ff4bcc24fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455185/normal_5fa723db5c0ef.pdfIn PDF document text
    • https://xivupofe.weebly.com/uploads/1/3/2/6/132681771/5697606.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450156/normal_5fcd8afeeed09.pdfIn PDF document text
    • https://zefipomez.weebly.com/uploads/1/3/4/8/134882075/wosigula-neduzedinunarav.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401716/normal_5fc8e7307ba74.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/5fce83a6142f2433c72768f9/t/5fd65710267c8d0ace45400b/1607882512479/animated_cartoon_clipart_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf57e461e25426e12fc102/1606375404102/fort_atkinson_pool_pictures.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5729b5be-49fd-4356-b382-392819c5beee/utsa_spring_graduation_2020.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf67f1af5bf52c326c0eb/1606219393690/76799942186.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_off0000b9ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9AB 4880 bytes
SHA-256: df1f02c809a18aa2fbc80a0502ed4035033bbef9e3151b65599e24f5122c0b98
font_01_sfnt_off0000ca64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA64 9252 bytes
SHA-256: c7f2930afecae5f7fd5af0df755dab3796a1c1c789e7ea972427c5d4b9b5acd7

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