Malicious PDF — malware analysis report

Static analysis result for SHA-256 cabb4aee5dbcc844…

MALICIOUS

PDF

80.5 KB Created: 2021-04-01 19:47:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0606839d3773059f29ecb11e1fbf7206 SHA-1: 5d21c07f23848bf3fa116ad13d1d1ed2c8ec398a SHA-256: cabb4aee5dbcc8446cc5832046b07873a31d94e5b8d230f3523c74b7c80dbf3e
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URI suggest it's designed to trick users into visiting a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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=free+christmas+sheet+music+piano+violin+duet
    • https://static.s123-cdn-static.com/uploads/4422906/normal_60016acdbfb3b.pdf
    • https://cdn-cms.f-static.net/uploads/4418973/normal_6057cb246fb4a.pdf
    • http://service-hire.com/97904216743dfo4m.pdf
    • https://cdn-cms.f-static.net/uploads/4370054/normal_604d5bf19b351.pdf
    • https://cdn.sqhk.co/gabixeme/jdcjeia/yellow_book_cover_vector_free_download.pdf
    • https://cdn.sqhk.co/duvetezoje/w8dcXgh/laser_cutting_3d_model.pdf
    • https://cdn-cms.f-static.net/uploads/4444647/normal_60279957afde4.pdf
    • https://static.s123-cdn-static.com/uploads/4449622/normal_600298d154e26.pdf
    • https://cdn-cms.f-static.net/uploads/4416792/normal_603d8cb997457.pdf
    • http://lishop.site/opat_beep_test_scorecard9x42m.pdf
    • https://cdn-cms.f-static.net/uploads/4428045/normal_6011a844b8ee0.pdf
    • https://cdn-cms.f-static.net/uploads/4387706/normal_605f6a752a34c.pdf
    • https://cdn.sqhk.co/busumodofu/esciige/dedesegurutinina.pdf
    • https://cdn-cms.f-static.net/uploads/4389820/normal_5fd9aee1777bf.pdf
    • http://mrshadow.net/zofunobagasuldjsd0.pdf
    • https://static.s123-cdn-static.com/uploads/4366366/normal_5ff9655f27490.pdf
    • https://static.s123-cdn-static.com/uploads/4403689/normal_5fcda2621c2cf.pdf
    • https://cdn-cms.f-static.net/uploads/4409417/normal_6037150942cb9.pdf
    • https://cdn.sqhk.co/zirevazul/dLytPed/11021137476.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/wifiduxezo/bharathiar_kavidhaigal_with_meaning.pdf
    • https://s3.amazonaws.com/povelenavuviw/brief_history_and_development_of_physical_education_in_nigeria.pdf
    • https://s3.amazonaws.com/godewumazek/58748286036.pdf
    • https://s3.amazonaws.com/vebogotexaf/videoscribe_tutorial_francais.pdf
    • https://s3.amazonaws.com/vutame/91216552580.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efbd.bin
3aa7aa967634eb78d142362ac8b59e97a30187ae4f68f4b03b01ed3345955e25		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBD 5208 bytes
font_01_sfnt_off00010146.bin
8dd70547f12568bac971c926f3c21e989a14e6daf21091a3ffca5e1fdb12b17f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10146 10584 bytes
font_02_sfnt_off00012583.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12583 4324 bytes

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