Malicious PDF — malware analysis report

Static analysis result for SHA-256 f71c8c7f2fb38b78…

MALICIOUS

PDF

35.8 KB Created: 2021-05-20 21:19:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 73a0f3d050e9cfc0faf4b56693585da4 SHA-1: 4d79f7dd8badbbc3797a58efca41afb518ec645b SHA-256: f71c8c7f2fb38b7888ccba6e717e8c823715b274978a677347f6eb59393efb15
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for game hacks and generators, directing users to external URLs. The presence of embedded URLs and the 'GAME_HACK_REDIRECT_LURE' heuristic strongly suggest a phishing or malware distribution attempt. While no scripts were explicitly extracted, the nature of the lures and the ML classification indicate a malicious intent to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

Heuristics 4

  • 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.
  • 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-speed-hack-game-hack PDF link annotation
    • http://beagle-cindy.de/images/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://beagle-cindy.de/images/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://beagle-cindy.de/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://beagle-cindy.de/images/free-robux-place_GM431946152.pdfIn PDF document text
    • http://beagle-cindy.de/images/free-spins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000030d7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30D7 24988 bytes
SHA-256: a92f9d0f168eff5146a64ba302c489aeff20e4169e8b07fcb794c66c2416ea26
font_01_sfnt_off000069c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69C9 18532 bytes
SHA-256: ecd25e1cae784267f5a646f1b70b1ce742945d3ce40e95dc5b3aacf46c412aa4

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