Malicious PDF — malware analysis report

Static analysis result for SHA-256 26373f4b40dbfd7f…

MALICIOUS

PDF

70.8 KB Created: 2021-01-17 23:13:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: cb9f69a9700a29158595caa1591151d0 SHA-1: bd49ebd74b2d03153d90d6b501859c5ad051d399 SHA-256: 26373f4b40dbfd7f3e0c940d2444d385c043288d539a7f6d11417b60cdb49d0e
154 Risk Score

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=portable+cd+player+for+car+with+usb+connection'. This URL is the primary indicator of malicious intent, suggesting a phishing or malware delivery scheme. While no scripts were explicitly extracted, the PDF structure and the malicious URL strongly indicate an attempt to lure the user to a harmful site, aligning with spearphishing tactics.

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=portable+cd+player+for+car+with+usb+connection In PDF document text
    • https://cdn-cms.f-static.net/uploads/4448991/normal_5fbc08dbc0ebc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410431/normal_5fa604812a155.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460060/normal_6001e6c0bcb37.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422148/normal_5fc3b54c4fcba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375361/normal_5fb88c4b0faff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366312/normal_5f8ab697dbdff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372354/normal_5fb94a97ea64c.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/pafexegud/conversion_of_analog_to_digital_signal.pdfIn PDF document text
    • http://tugupora.epizy.com/chapter_2_linear_equations_and_inequalities_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/lagu_missing_you_btob_matikiri.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/wiverokaxakijelubuvu.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/acura_bespoke_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/40396267483.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/natural_cure_for_chiari_malformation.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/topographic_maps_of_india_free.pdfIn PDF document text
    • http://betewegomoge.epizy.com/auto_chess_mover_free.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_off0000d3b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B6 5580 bytes
SHA-256: 366e5d4103ca965be4628286e4c5f5a6dd05afe444eb2892a86704fc2a01433f
font_01_sfnt_off0000e6ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BA 10936 bytes
SHA-256: 58ea64133b9ba0f56633a53a0e12d7b303087eb5fa0a359edd8373840ee0e405

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