Malicious PDF — malware analysis report

Static analysis result for SHA-256 748da986aa3e9c2b…

MALICIOUS

PDF

35.7 KB Created: 2021-05-10 11:34:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7e454ca52eb2591c05f18250452c0cfe SHA-1: c49fce64988e441acd3315d95e9e65e56fcdd5ca SHA-256: 748da986aa3e9c2b2e6034cb188a6d250841c22a5f83377525c7c169ea6d843e
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document uses a social engineering lure related to a 'Roblox Account Hacker Tool' and prompts the user to install a browser extension or update. This is a common tactic to trick users into executing malicious content or providing credentials. The embedded URL leads to a suspicious domain that further reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier clean score 0.0265

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://netcdn.xyz/app/431946152/roblox-account-hacker-tool-game-hack PDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000325f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x325F 24104 bytes
SHA-256: ab46b4e5a8c23b4acb3b1f392259dd72fe6dbc3774cb38468216ccce408aec55
font_01_sfnt_off00006960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6960 18428 bytes
SHA-256: be2d3c57b171ea36946098a74c5bbef6bd2a12406cdf89d7d5ae97ba7b22bd3c

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