Malicious PDF — malware analysis report

Static analysis result for SHA-256 f80518767a810326…

MALICIOUS

PDF

45.8 KB Created: 2021-06-11 07:49:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: e1a736f5a1fa75c03f2cb25c6b565e66 SHA-1: f9a97ba7a9d5b8e894d11b1e9100bc6b5b567d1c SHA-256: f80518767a810326c41561eee210e90e7a03f95a3e7f98e4f46d9bd12fafbf58
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising game hacks and generators. The document body, though heavily obfuscated, contains URLs that align with the heuristic findings of malicious redirector links and game hack lures. The primary goal appears to be directing users to potentially harmful websites through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/roblox-hacker-face-game-hack In PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-admin-hack-no-download_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/wurst-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-cheat-engine-walk-speed_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/very-easy-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/today-coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-get-more-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-make-script-hack-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-game-hack-app_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-can-i-get-free-coinsn-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-roblox-gift-card-codes-2021-unused_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/aimbot-download-roblox_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_004_off000052ca.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52CA 27016 bytes
SHA-256: 6895622c8cbcb00ccf8bd500ac51adcf662ddaa01845f22dad45b68d35bc7cdf
font_01_sfnt_off0000908e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x908E 18344 bytes
SHA-256: 70e2ee6343742797403eec3510c89735d5b2b4ba9f6e1e90231148b399ea37b2

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