Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e8b36ffa4ea5448…

MALICIOUS

PDF

84.6 KB Created: 2021-01-13 15:55:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 7ef7c537f070d3979d621cf1f89ad733 SHA-1: 25a4bf851e93b920a75789c259ed58d16094d244 SHA-256: 6e8b36ffa4ea54487824fbc9a55b68a38defca69c8add0df233365b3701d545c
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, likely leveraging a client-side exploit or phishing lure.

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://ggtraff.ru/aws?utm_term=cascada+everytime+we+touch+audio In PDF document text
    • https://cdn.sqhk.co/vefuwebilux/0Lie8ic/nafexepoluxesubomido.pdfIn PDF document text
    • https://cdn.sqhk.co/xigofidiw/ejfHxie/word_crush_level_758.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/ehicjbL/regal_cinemas_stockton_holiday_8.pdfIn PDF document text
    • https://cdn.sqhk.co/wevexifimur/XageCjc/random_fill_color_illustrator.pdfIn PDF document text
    • https://site-1173941.mozfiles.com/files/1173941/skylanders_imaginators_switch_target.pdfIn PDF document text
    • https://cdn.sqhk.co/joxipadij/ieijgdy/80726184042.pdfIn PDF document text
    • https://cdn.sqhk.co/tevotapomow/dPBgeic/77744251550.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/libosokune/cardiovascular_system_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/xopezukijenemonafad.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/hr_internship_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/69681256670.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B4 5304 bytes
SHA-256: 77713b465fbf95ad2c99529c3f48d79c10b679a697c653e3d9f755b888f70bcf
font_01_sfnt_off000108a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A6 11992 bytes
SHA-256: 4d2b92e3d894fabd74dbfa7058b29d300777584b675c9e4d043d0e06285f7656
font_02_sfnt_off00013036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13036 16120 bytes
SHA-256: 184efd0e138a9418359f6897f9ac56b5cd93cafbd57abf30711ac2aee7e18832

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