Malicious PDF — malware analysis report

Static analysis result for SHA-256 e23ff03728343ce5…

MALICIOUS

PDF

44.2 KB Created: 2021-04-17 17:26:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 864c8e453764caa857a50995a1ee651d SHA-1: 7290c00e3cad436f069dc0c5e4d7e0ec752a0daa SHA-256: e23ff03728343ce5de9f2ac03d59cd326d0b4cfac4f7646f6b5e4a6ce8775f04
72 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a prominent link to a 'free generator / game hack' website, identified by the PDF_GAME_HACK_REDIRECT_LURE heuristic. This strongly suggests a social engineering tactic to trick users into visiting a potentially malicious site. The document body also contains text related to 'Roblox Noclip And Fly Hacks' and a call to action, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier clean score 0.0366

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • 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://gaminggenerator.org/app/431946152/roblox-noclip-and-fly-hacks-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_off00003725.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3725 39664 bytes
SHA-256: 04afc6038dd5e0cb151259c4b18fa4cc9d1b1302b7d1a9dcefc620c6ff63e7c1
font_01_sfnt_off00008ba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BA2 18436 bytes
SHA-256: faf27ca635a08e505bd7c80b74004faa40626035b8ff9249fef445d02eda2e81

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