Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3e95f6a3099537f…

MALICIOUS

PDF

33.4 KB Created: 2021-07-19 12:42:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 580ad753ae2211d21800b6ce8f921ffe SHA-1: cad4e6e8107d73a32015fd7021eeadc2740c9fe9 SHA-256: b3e95f6a3099537f38eb1003eaf5939ba2c414858c931304b37ea9687f903c96
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, with a primary focus on luring users with "game hack" and "free spins" themes. The heuristic firings, particularly 'PDF_GAME_HACK_REDIRECT_LURE' and 'ML_NYX_PDF_MALICIOUS', strongly indicate malicious intent. The document body also contains a call-to-action phrase, reinforcing the phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://netcdn.tw/app/406889139/coin-master-free-spins-blogspot-game-hack PDF link annotation
    • http://neumann.fr/images/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://neumann.fr/images/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://neumann.fr/images/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://neumann.fr/images/free-robux-link_GM431946152.pdfIn PDF document text
    • http://neumann.fr/images/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://neumann.fr/images/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://neumann.fr/images/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://neumann.fr/images/free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://neumann.fr/images/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://neumann.fr/images/master-coin-free-spin_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_off00002b52.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2B52 23352 bytes
SHA-256: 636aa498873ae9fadbfd62c36e0639b9e5b5b9913f121e9bbe3f83337aa13c05
font_01_sfnt_off00005fed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FED 18464 bytes
SHA-256: 7f13c81e41627db5de1fdc011b77043c9877b216986226f08b9acd2eded814ce

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