Malicious PDF — malware analysis report

Static analysis result for SHA-256 dde9db5c56bd34f6…

MALICIOUS

PDF

41.0 KB Created: 2021-05-16 10:41:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 82f7d93e7e678ac8ece7d47445d07f4a SHA-1: c50d6e687ebe61d41600f22075565918e8da5a40 SHA-256: dde9db5c56bd34f625a6856c31e57daf47f08ea28b14e1fe9e903c56939c293d
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to redirector infrastructure, including a primary URL associated with game hacks and free spins. The document body and heuristics indicate a lure for potentially unwanted content or further malicious redirection. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lead the user to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • 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/406889139/coin-master-hacks-for-free-spins-game-hack In PDF document text
    • http://www.fabbrotorino.eu/images/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/coin-master-free-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/coin-master-daily-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/roblox-robux_GM431946152.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/how-to-get-daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/collect-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/minecraft-tower-defense-2-hacked_GM479516143.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/hack-coin-master-apk-31_GM406889139.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/www-roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/coin-master-link-daily-get-free-spins-amp_GM406889139.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/minecraft-beta-free_GM479516143.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.fabbrotorino.eu/images/apk-hack-coin-master_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_003_off000046f0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46F0 24408 bytes
SHA-256: 8723615be221b2e74c32f1a281cfaf630cf576c711b7d6a84dd1973edad92567
font_01_sfnt_off00007e6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E6E 18056 bytes
SHA-256: 12d79a7ddbb75c7a0854102822057d5441bee2ca4a20c79f8211a3d0b9a1f375

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