Malicious PDF — malware analysis report

Static analysis result for SHA-256 c91e2a0c8516612f…

MALICIOUS

PDF

42.3 KB Created: 2021-05-19 07:19:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d707e22348931db5af2deaa277e0f9a9 SHA-1: fc1b9576931338e2df6dd4287eb4d80295906239 SHA-256: c91e2a0c8516612f9eebe27e1d2e0cfb44e82b190b8fe226fdd7febc45c15487
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks, specifically mentioning 'Lots Of Robux', and includes a high-confidence heuristic firing for a game hack redirector. The document body and extracted URLs point to websites offering free Robux or game cheats, which is a common social engineering tactic. The embedded URLs likely lead to a malicious site designed to exploit user interest in free in-game currency.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/lots-of-robux-game-hack PDF link annotation
    • http://dieter-sauter.com/images/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/how-to-create-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://dieter-sauter.com/images/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/ww-robux_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/instant-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/roblox-bux-free_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/moon-active_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/robux-only_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/pro-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/win-free-robux_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-roblox-shirt-templates_GM431946152.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_003_off000047ab.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47AB 26104 bytes
SHA-256: deaf1b193fc5d1be42088b0b7899b0e8af181f7696f01264d83cbda9e249d77d
font_01_sfnt_off000083c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83C3 17952 bytes
SHA-256: 15d841c4e586d0ad4ef984c3fe87cdc5c0f17f998b76c5925d27cfadcec23376

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