Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d6cf508a6a3e6c2…

MALICIOUS

PDF

89.8 KB Created: 2021-07-13 02:17:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 25c30f61114e8fcbd5578189dd99a94b SHA-1: de1928670505f3d1d6c2cac5873f5444f8e3e187 SHA-256: 8d6cf508a6a3e6c2173dbb9cb00a24c3b57bbbdbbb7abf44741dedb53f0c0e7b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. An embedded URI points to a suspicious domain, likely intended to host phishing content or a secondary payload. No scripts were extracted, but the presence of a malicious URL in a PDF suggests an attempt to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8322

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://medvor.ru/square?utm_term=sean+hayes+podcast+smartless
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec94369c874e7142492841/1626117175107/devos.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7a90338ed220952aab8e1/1625794819706/vawedila.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec8f94f6fc466b5bf423d0/1626115988858/best_8_pack_workout.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7f01d8f757b1ac45275cb/1625813021941/89215281817.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60eccc6f446c44105d48348e/1626131567150/betting_on_sports_personality_of_the_year.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e859f71e8f1a711b29e335/1625840119781/xejukov.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_off0000fc98.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC98 16792 bytes
font_01_sfnt_off000114aa.bin
b073e03c06b589f9be500ad83c2f01c78bb6fe8caa5c21361723cf9e51c8a152		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114AA 17412 bytes
font_02_sfnt_off0001424f.bin
db69aff52dc5a988ea57f444c4103b4bd595bfbd8e62f20760289c15fc65217f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1424F 10876 bytes

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