Malicious PDF — malware analysis report

Static analysis result for SHA-256 25cf41718a799075…

MALICIOUS

PDF

42.8 KB Created: 2021-05-14 21:15:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 99dc55440686e37edf3c49f57c1a430f SHA-1: 0269dd4c2b3ee2f16e209d90261d6460994bd355 SHA-256: 25cf41718a7990751f89bd77aa05f42f8b9b3c534038df9e1f0530db16474fb2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure for a 'free game hack' which redirects to a malicious URL. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs suggests the document is designed to lead the user to a compromised site. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or social engineering attack.

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/479516143/minecraft-windows-10-code-free-game-hack PDF link annotation
    • http://www.fabbrotorino.eu/images/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/coin-master-hack-tool-pc_GM406889139.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/coin-master-spin-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/coin-master-hack-tool-pc-download_GM406889139.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/free-roblox-gear_GM431946152.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/coin-master-game-hack-version-download_GM406889139.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/roblox-free-pants_GM431946152.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/free-robux-website_GM431946152.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/blox-supply-free-robux_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_off00004b1e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B1E 25356 bytes
SHA-256: e1b34865635ea31d73b94d1d1dedcd363bd35eb2ccc149362f943d9095aa7481
font_01_sfnt_off00008429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8429 18524 bytes
SHA-256: 5b7120127fa4edfe27b05f386d671bb01f7656ae4c322eea86db10496a4e6823

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