Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f1cd323e1b15510…

MALICIOUS

PDF

41.8 KB Created: 2021-05-10 18:35:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 752742083184da4d6df475d0ca128d4f SHA-1: 5ed499f1945071a836f3d4d9eea4e63cdf1a12a2 SHA-256: 5f1cd323e1b1551087850eb2fae0f5219187d674edb3f033dc65d8231f36de7a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that lead to known malicious redirectors, specifically designed to lure users with game-related cheats and hacks. The document body and heuristics indicate a clear intent to redirect users to potentially harmful content, likely for further exploitation or malware delivery. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • 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.
  • 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/479516143/toolbox-for-minecraft-ios-game-hack In PDF document text
    • http://clubpure.org/images/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://clubpure.org/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://clubpure.org/images/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • http://clubpure.org/images/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://clubpure.org/images/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://clubpure.org/images/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://clubpure.org/images/mcpe-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://clubpure.org/images/roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://clubpure.org/images/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://clubpure.org/images/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://clubpure.org/images/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://clubpure.org/images/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://clubpure.org/images/how-much-robux-can-you-get-with-1-million-dollars_GM431946152.pdfIn PDF document text
    • http://clubpure.org/images/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://clubpure.org/images/robux-free-online_GM431946152.pdfIn PDF document text
    • http://clubpure.org/images/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • http://clubpure.org/images/get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://clubpure.org/images/coin-master-free-coins-and-spins-hack_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_off0000498b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x498B 24888 bytes
SHA-256: f26d9c9366a6b21bca9ce4f6a24021f437bfc1769f852343164905557aa3c97e
font_01_sfnt_off00008185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8185 18152 bytes
SHA-256: 00efac36cff71ff299be5bc46999ebb3fdd16e50bdaeff84e7245ae46705892c

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