Malicious PDF — malware analysis report

Static analysis result for SHA-256 33508559f17a0c4f…

MALICIOUS

PDF

65.0 KB Created: 2021-04-01 07:44:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 437cf53deb4307c4d3ce7cd9095d0340 SHA-1: e09dd7f2007472f3b3ebddc9f52048a79ca7d3d9 SHA-256: 33508559f17a0c4fec731df6cc1ffb90c8226fc20f3e5d13e4760ff53a439a15
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, masquerading as a medical treatment guide. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of external URIs suggests a redirection to a malicious site.

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://resalured.ru/award?keyword=spontaneous+bacterial+peritonitis+treatment+pdf
    • https://cdn.sqhk.co/nixenexax/1RamDgj/white_tripod_floor_lamp.pdf
    • http://zoziwasikow.22web.org/fibamujifavakatigodaxu.pdf
    • https://cdn.sqhk.co/waxipefimafa/bhdIghN/kigajupagagobig.pdf
    • https://cdn.sqhk.co/kegufamop/jb9jhen/sogameso.pdf
    • http://auto-fishing-rods1.club/college_assignment_formatc7xx2.pdf
    • https://cdn.sqhk.co/mosugukasiba/OqpThc7/the_impossible_quiz_answers_q_42.pdf
    • http://begdas.space/calendario_2021_con_festivos_puerto_ricoe7hcn.pdf
    • https://cdn.sqhk.co/jowowibow/fgfIjcJ/40999724969.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f405dec1-7f90-4f4c-a861-5286f67d0127.filesusr.com/ugd/ab922d_eb297e9e8ed143a0a952966b8db80a9a.pdf?index=true
    • https://s3.amazonaws.com/mokuwanibof/winobimex.pdf
    • https://8cff94d3-ecab-4ea5-ad27-d3e67d02fd32.filesusr.com/ugd/2813e2_735ae8139b254ad1bbd010a57a7301ed.pdf?index=true
    • https://s3.amazonaws.com/dazemi/25334698743.pdf
    • http://zeluwaboder.rf.gd/51803998877.pdf
    • https://s3.amazonaws.com/navoburarovada/nike_joggers_mens_size_guide.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c295.bin
0f0858d4f7ba15ac17b794cf135370530e37bfdcbcdf4ced1634a73bdc2162fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC295 5544 bytes
font_01_sfnt_off0000d548.bin
3e899cb97099b5c95d65649fd8070f7252e29e0e198d699fa2a206a9623f1399		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD548 9904 bytes

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