Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d1e7ac9994268d2…

MALICIOUS

PDF

78.8 KB Created: 2021-07-21 09:09:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 44732af068c947b8d2b161212c785749 SHA-1: 3d97f98def529ad4d340dd22f582f374d976ece7 SHA-256: 4d1e7ac9994268d23abb8d550d757967997c087a1354a76fe5cd2591efbee324
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged the PDF as malicious. The document body, though heavily obfuscated, suggests a lure related to adult games, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6166

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
  • 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://philabc.ru/square?utm_term=adult+game+free+apk
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f13c1a5422dc4ac5c6d439/1626422298924/55391671943.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f5abdf7383b169ac1b7768/1626713055296/watch_freaky_friday_full_movie_online_free.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e78c4f57d2352c9277b981/1625787471945/gukutegixugofex.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8d03024e1847d8367e9a3/1625870384602/pokemon_fire_red_x_and_y_cheats_rare_candy.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_off0000d50f.bin
7f394f0f6d7c8c42064ac6ef211bbc32b683bd69b894425bbb085a8a1bbb40de		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD50F 16508 bytes
font_01_sfnt_off0000fffd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFD 16792 bytes
font_02_sfnt_off00011814.bin
45c8578c21da0690933dd038c6ad78cd2c8f3e4ae0f810ccca21d0221fd4884b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11814 10528 bytes

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