Malicious PDF — malware analysis report

Static analysis result for SHA-256 42f768e62ba8eb3e…

MALICIOUS

PDF

73.3 KB Created: 2021-03-03 18:05:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: f9c6296f0615a756b58d50b6386edfa8 SHA-1: 018d5963981a9ea898d90044b2e8c783141fcbe5 SHA-256: 42f768e62ba8eb3edf601d0de55f566e8e95d92f91d6787124673e2206de3431
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The embedded URL, 'https://crophysi.ru/strik?utm_term=merchant+of+venice+movie+analysis', suggests a phishing or social engineering attempt, likely disguised as content related to the 'Merchant of Venice' movie. The ML classifier and ClamAV detection further support its malicious nature. No scripts were extracted, but the primary attack vector appears to be directing the user to a malicious site.

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
  • 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.
  • 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://crophysi.ru/strik?utm_term=merchant+of+venice+movie+analysis In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_602d46f2dc3dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374699/normal_5fd3849c229f6.pdfIn PDF document text
    • http://teksalle.xyz/wipomesosorkxb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454163/normal_600d3fb1aea55.pdfIn PDF document text
    • http://getsol.xyz/38668576838at6lq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424981/normal_60214fc047687.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366350/normal_5fffdc4a21cbd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416806/normal_5fe5b58c86d29.pdfIn PDF document text
    • http://workbykoder.xyz/bolafosixijop7l1l.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/jasadavebaga/hemorrhoids_management_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/cartola_fc_apk_mirror.pdfIn PDF document text
    • http://zitasixan.atwebpages.com/how_to_reset_my_samsung_top_load_washer.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/afterfall_insanity_extended_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/68774490659.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/53480423494.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_off0000e35e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35E 5288 bytes
SHA-256: 73d882450455e8f82b2fa6f6b82204d3c2e0d65f0bfc2df7ad73a3b60e4e6614
font_01_sfnt_off0000f54d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54D 10300 bytes
SHA-256: 4f31c9baa87b79b029a6686dde9aa80315644b15cfdb80ee2e5a8d61528bbbbe

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