Malicious PDF — malware analysis report

Static analysis result for SHA-256 8656ced5d5dd8a76…

MALICIOUS

PDF

82.4 KB Created: 2021-03-15 08:42:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15b8a7fb5ca95193d1c4ebbae233bbe6 SHA-1: 918a24fbddb30aa1c842b85a4e8d763c6b458823 SHA-256: 8656ced5d5dd8a76ab3367fbbec14a2092ae80ee8538b56ca854412b814b1b78
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URI that directs the user to a suspicious domain, masquerading as a legitimate search result. This is a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a site that hosts further malicious content or attempts to phish credentials.

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
  • 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://dafemum.ru/123?utm_term=debussy+clair+de+lune+music+sheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459166/normal_601f211f0173b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447878/normal_5fcbe6f4287df.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414176/normal_5ff9ab6793a1d.pdfIn PDF document text
    • https://cdn.sqhk.co/tamaladafa/flygjgh/soccer_crazy_facts.pdfIn PDF document text
    • https://cdn.sqhk.co/sowanigog/tZjhggG/sagiwaxosasirugud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498324/normal_603b037fd8d3a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406775/normal_5ff2403f8f3c7.pdfIn PDF document text
    • https://cdn.sqhk.co/lesasafo/jgpYii0/woluxafuzibudivisik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rulamiji.onlinewebshop.net/musokivawupetida.pdfIn PDF document text
    • https://5b2b9875-3923-4577-9ef6-0527498c95e7.filesusr.com/ugd/4e6dd5_71f021c3a4f34ee9b827ed21384bd897.pdf?index=trueIn PDF document text
    • https://bdee3e82-1fe6-4084-b289-f15f5249f83e.filesusr.com/ugd/749937_95e843e93c39411389d6d500f396ccfa.pdf?index=trueIn PDF document text
    • https://7404da97-7fcf-4d5f-9d5f-3f8644e6773a.filesusr.com/ugd/35f767_e2154e0f4b3f417d9b961e6bd1575f77.pdf?index=trueIn PDF document text
    • https://70010cfe-69b1-4fe9-a336-bdfe2418dc1e.filesusr.com/ugd/f1d680_cae0198b2add4a31b5f8e1e6ac6e02c5.pdf?index=trueIn PDF document text
    • https://47ab6ce1-aee6-4086-a8e7-31fe393d2411.filesusr.com/ugd/afbef4_5bfc0d111b7b4d0487865d80f1b6b6e4.pdf?index=trueIn PDF document text
    • https://5d94d51b-2702-4b64-8df3-eadd022f3edc.filesusr.com/ugd/2ddd39_e880a664e14245179b0706ba10fe17a2.pdf?index=trueIn PDF document text
    • http://vugugemo.atwebpages.com/99416378778.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8fc.bin
f19176f30a38a02cc11c78ab95af4d45172429fa452bce241f4214111a93bb39		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FC 5420 bytes
font_01_sfnt_off0000fb45.bin
3f923f81c6e8a46cd3809a7c303cdd6e3372e75c84ca4679ebe0440d84a7e7ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB45 12100 bytes
font_02_sfnt_off000124bd.bin
99308d2943c7867383f38f1c211846cc6735cce0880ded375eef66ea4f3e2d8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124BD 16184 bytes

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