Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe459e9dd6b614d2…

MALICIOUS

PDF

37.9 KB Created: 2021-05-23 17:09:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c3ba81aefda078be9a782d57285df7c9 SHA-1: 8c5017d5adb3735e4daddc16b19736f07ee730d0 SHA-256: fe459e9dd6b614d24207414ca9b7c8656c828d17015ff1c623fd7722094affd9
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and text lures related to "free Robux" and "game hacks", directing users to malicious domains. The ML classifier strongly flagged this PDF as malicious, and the heuristics indicate it's a redirector for game hacks. No scripts were extracted, but the document body and embedded URLs clearly indicate a phishing attempt to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9660

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/free-robux-no-scam-game-hack PDF link annotation
    • http://casabea.de/images/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/how-to-see-chegg-answers-free-tiktok_GM835599320.pdfIn PDF document text
    • http://casabea.de/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://casabea.de/images/free-robux-just-click_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_002_off00003304.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3304 27316 bytes
SHA-256: f56c6e1fa71123c60e515386a2b47c6807d96fe468bab2e83d3f0263505badb1
font_01_sfnt_off00007237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7237 18500 bytes
SHA-256: b3a5a2e86a30a2234a3ee6d3c2f7de48a52411aef28342c5883490dd6d64f819

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