Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d2457d4c6c14e70…

MALICIOUS

PDF

33.1 KB Created: 2021-07-06 13:29:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: d95c1e48e93a01c3c8bb7c562ef149e3 SHA-1: 77ec0ea6c6fcb76d9e7ad1fa2c44a7fe6c462b14 SHA-256: 3d2457d4c6c14e707e659dd5d202362d2c06a8c07ceaf9dd9bd6762ae8bf28f6
160 Risk Score

Malware Insights

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

This PDF document contains multiple links to known malicious redirectors and lures users with promises of free Robux and game hacks. The embedded URL 'http://netcdn.tw/app/431946152/is-there-a-way-to-get-free-robux-game-hack' is a primary indicator of this malicious intent. The document's structure and content strongly suggest it is designed to trick users into navigating to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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 http://netcdn.tw/app/431946152/is-there-a-way-to-get-free-robux-game-hack In PDF document text
    • http://library.acehresearch.org/repository/get-free-shirts-roblox-nbc_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-cheat-engine-access-violation_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/esp-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-hack-2021-computer_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-catalog-free_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-cheat-noclip-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-girl-avatar_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-make-your-avatar-really-small-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/robux-earning-websites_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-generator_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/minecraft-free-install_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-inspect-hack_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-spins-today-new_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-robux-items-for-free_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
font_00_sfnt_off00002a40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A40 22240 bytes
SHA-256: ef10b7880cee266cbda45903f8517e14db47df479d78fbbf376fd10e63f31c51
font_01_sfnt_off00005b9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B9D 19364 bytes
SHA-256: ab7ba1a3ae240e4ee08c4c4f60ea65632c07d764c3c2f84f8903e8b00cabe730

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