Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e27801584fa050d…

MALICIOUS

PDF

66.7 KB Created: 2020-11-13 17:00:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 51c8b63f17b4c934f8c94bc6049a7187 SHA-1: d8a26485564ec6991f89e4ad2a9845b78bde5cf1 SHA-256: 5e27801584fa050d87dd518fb1ecd57e05e560d55fa704ef096e54272832f39f
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://cctraff.ru/strik?utm_term=commander+of+argus+guide'. Additionally, a high-severity heuristic indicates a 'Clipboard command execution lure', suggesting the document instructs the user to copy and paste content into a shell. This combination strongly implies an attempt to trick the user into executing malicious commands, likely as part of a phishing or malware delivery scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://cctraff.ru/strik?utm_term=commander+of+argus+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379726/normal_5f8ba44d605dc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/persona_normal_benito_taibo.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/5365225206.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/skyrim_immersive_creatures_list.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/15483924969.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/7905028276.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/17923294110.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63aa6065-b251-419e-9142-7a715b19b4fb/bisadafeserepebubakuv.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/15277932727.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/lijepenug.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/ruby_falls_redbud_tree_pictures.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/jezejitokasaxirugi.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/rugakibawize.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/lsat_test_dates_2020_2021.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/44061049459.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_off0000c840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC840 5100 bytes
SHA-256: baf66ad650e32e8570c4ae914e5a4c94fe55b82fb87907604166f8edc785b84a
font_01_sfnt_off0000d97f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD97F 11000 bytes
SHA-256: f515e82dcb666be52cf3aa133a5a742b4f2992d1469488bec3cc0d5dbc5ce0bd

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