Malicious PDF — malware analysis report

Static analysis result for SHA-256 33bad2f19b728174…

MALICIOUS

PDF

65.4 KB Created: 2020-12-16 22:48:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0976d92bb01735d5d3ef978d0a00f479 SHA-1: e57eb25d0fbdc3a2ce2747cc17e23b7a5db3c1dc SHA-256: 33bad2f19b728174daf622e30deb92f7e74e04f4567c8496dc23fc7c69f30367
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/123?utm_term=welcome+holy+spirit+benny+hinn+pdf+free+download'. This URL is associated with known malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. The document body, though partially corrupted, contains text suggesting a lure for a free download, aligning with a phishing or malware distribution tactic.

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
  • 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://cctraff.ru/123?utm_term=welcome+holy+spirit+benny+hinn+pdf+free+download In PDF document text
    • https://vesalitekaso.weebly.com/uploads/1/3/4/3/134314643/gilob_zuxirifere_vomuwi.pdfIn PDF document text
    • https://xiduxerajul.weebly.com/uploads/1/3/4/6/134696605/5355678.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fcefd143d778404109110a2/t/5fd6c5dfde5b1220c03a0897/1607910880417/greek_architecture_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/vaduzigewi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d501767-a057-4b97-a063-747b71cc26e7/93081494531.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2844063-c272-4441-99f2-cd7ffc02f552/john_deere_650g_dozer_service_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe367a1972c46e3c6a067b/1606301307558/6123841303.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/rocketfish_hdmi_cable_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/jinalixezuvofujemubakur.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd06ffdae50a014588a26a/1606223616167/nuboxoladowebososer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21b23bc2-ece2-4012-95e4-392358dec380/teorema_fundamental_de_la_numeracion.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc790969849b27a00a72557/t/5fcbdbec393ce473563f7977/1607195628948/welizafexogemomofutefaxoz.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/teoremas_de_angulos_en_la_circunferencia.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_off0000c010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC010 5740 bytes
SHA-256: 33155d0532d96ce179f70b49f6ab004b227469cab2d3619ddcea87cc6ea46245
font_01_sfnt_off0000d38a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD38A 11040 bytes
SHA-256: 94aa5d934bb534cca8a5286458d3b9721d706b4a28910e6c3c0f4424759a264b

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