Malicious PDF — malware analysis report

Static analysis result for SHA-256 90396b7c34c80c9b…

MALICIOUS

PDF

81.8 KB Created: 2022-06-07 06:11:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: 5017727f1dc049d5c64b19df7a0be620 SHA-1: 7867218a98f3dd862d751a307e0bd550fe2806dc SHA-256: 90396b7c34c80c9b09f488769909bd8c59086483e09ffe4a0cd6f7a6db63ea89
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, with a high risk score. It contains an embedded URI pointing to a suspicious URL, which is a common tactic for phishing or distributing further malware. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the external URL is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://sunuf.co.za/YmrXLWy8?keyword=baba%20yetu%20ttbb%20pdf%20downloader%20software%20free
    • https://hanxinlvyou.com/FileData/ckfinder/files/20220415_C7C36B9FE3F6275B.pdf
    • http://otestmanager.com/club/data/userfiles/file/20220307072058.pdf
    • https://fivamudefapot.weebly.com/uploads/1/4/1/8/141862193/894847.pdf
    • https://gulivogafiwimu.weebly.com/uploads/1/3/4/7/134746454/6242298.pdf
    • https://nuguserofaj.weebly.com/uploads/1/3/0/9/130969707/mafekikakad_bidiwogodixen_rototusiz.pdf
    • https://vaxatimiroxak.weebly.com/uploads/1/3/4/6/134617636/d08640880e8.pdf
    • https://nugijokokul.weebly.com/uploads/1/3/0/9/130969158/1ae1515d904.pdf
    • http://whipitleather.com/userfiles/file/3717600157.pdf
    • https://finaxapiw.weebly.com/uploads/1/3/5/3/135301963/8618752.pdf
    • https://rolutadaneked.weebly.com/uploads/1/3/2/6/132681657/481541.pdf
    • https://kenufipafalenar.weebly.com/uploads/1/3/4/6/134616414/6005312.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16266291740746---47538569901.pdf
    • https://faguaflowers.com/images/admin/file/pubuviditojizuratosizego.pdf
    • http://www.cartes-blister.com/img/uploaded/file/fumurid.pdf
    • http://fotostudiovaccari.it/userfiles/files/lidib.pdf
    • https://swissairtech.com/contents/files/12020076787.pdf
    • http://www.admion.cz/upload/files/56566471208.pdf
    • https://poolpoint.be/uploads/file/39439881470.pdf
    • https://riwubabefos.weebly.com/uploads/1/3/4/5/134591520/gadexasate.pdf
    • http://chpcentre.com/files/file/81283168577.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7fc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD7FC 16792 bytes
font_01_sfnt_off0000f013.bin
46d40cae652e69994ae0bd73e6a0d6934c5d87f01ac7a4088b74de4b5d4114ed
pdf-font-stream PDF embedded font (sfnt) at offset 0xF013 10892 bytes
font_02_sfnt_off00010952.bin
7728d9847ec6ef7f9799ba13b9555a9178e4a7f3160738344007faccc1aef98e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10952 18260 bytes