Malicious PDF — malware analysis report

Static analysis result for SHA-256 2978bf276fa57170…

MALICIOUS

PDF

75.2 KB Created: 2021-07-14 09:06:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8076ea5f578ae7eadf5034ec246a6309 SHA-1: c7e705051ada89092f2d21954f994d4891d67309 SHA-256: 2978bf276fa571709f1d1552a87fe674ab4ffe95fe0eb148843ce7344788fba2
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. ClamAV and ML classifiers flagged this PDF as malicious, indicating a high probability of malicious intent. The PDF structure and embedded URI suggest a social engineering tactic to trick users into visiting a potentially harmful website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8872

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://synerhu.ru/square?utm_term=life+after+life+pdf+free+download
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec92d451a87c5d75ad245a/1626116821026/35543748396.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8d0d438670b5817c46818/1625870548464/bivobufurojefobuxa.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e925c12dabf272355489dd/1625892289635/33794367898.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee2a0a115d504d3a84e1c4/1626221066728/how_to_edit_a_password_protected_without_password.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e95cd727127e6804178253/1625906391558/30513219866.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8fe.bin
311ce08b7c062bf4d64dfcd48716a63187ee12969634f87bef533b3e68512faa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8FE 10364 bytes
font_01_sfnt_off0000e085.bin
089b9c2071f48b75df4f4ed50c7ebd0ca7737a98d6e07f595f5b8dda1db63273		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE085 15756 bytes
font_02_sfnt_off000108fa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108FA 16792 bytes

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