Malicious PDF — malware analysis report

Static analysis result for SHA-256 908d8115ca29379c…

MALICIOUS

PDF

36.4 KB Created: 2021-06-30 19:49:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4e8a01a1a807b438a419ce1bdad3730a SHA-1: 056419b95401bbd08dfdd062d198278917b62504 SHA-256: 908d8115ca29379c947e3337c8439855ce30120d4b4f61a325c39e4a397bfb48
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that point to known malicious redirectors, disguised as "free generators" or "game hacks." These links are designed to lead users to potentially harmful websites. The presence of these lures and the ML classifier's high confidence score indicate a malicious intent to redirect users to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.co/app/431946152/how-to-hack-into-admin-on-roblox-game-hack In PDF document text
    • http://gts.edu.gh/library/repository/roblox-one-piece-millenium-hack-no-script_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-free-robux-no-download-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-hack-root_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/earn-rbx_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-codes-no-survey-no-download-2021_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-free-roblox-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-admin-free-spins_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-do-you-get-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
font_00_sfnt_off000034d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34D4 22828 bytes
SHA-256: f750270e2dbbea9ca67bd33d6ca5ba229ecf89b39046d6b5f6a086ce7f9470a8
font_01_sfnt_off000067e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67E6 19476 bytes
SHA-256: d0621970268f001b76f3c50db6cece6b1a40415b89e1ce6926b6e62245b90e4d