Malicious PDF — malware analysis report

Static analysis result for SHA-256 42aee8a944019fb7…

MALICIOUS

PDF

39.8 KB Created: 2021-05-23 01:06:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: dc60e4c01ae66ac7a66469ca3242d987 SHA-1: 881dfe59b69c63d1ec65181166dea7db10d7c587 SHA-256: 42aee8a944019fb747121e2ba8ae3e5f101034ab196cb33ef3f3c7223fa13691
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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/835599320/get-free-tiktok-followers-game-hack PDF link annotation
    • http://casabea.de/images/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://casabea.de/images/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://casabea.de/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://casabea.de/images/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://casabea.de/images/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000317c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x317C 28856 bytes
SHA-256: 330f88c1355f03ee5ae790540941174fe733d8a6245d298f078d41e2d5e94242
font_01_sfnt_off000071b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71B1 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off00007bc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC0 17692 bytes
SHA-256: 02c3cedea4a2807b323b614e41e6797ad921ddb65350057b59541dca36dbbb9a

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