Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c92fe98ba791d27…

MALICIOUS

PDF

43.8 KB Created: 2021-05-02 20:22:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 78e31d0dea20f3680058a79b566995e8 SHA-1: c4446af3603233efbd367cb2b35ca787965fa0d7 SHA-256: 8c92fe98ba791d27274a3af164f91bb52652e690c61ea147c581d00b8d551456
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, with one identified as a malicious redirector. The document body and heuristics suggest a lure for game-related cheats or generators, which is a common tactic for distributing malware. The presence of numerous links to potentially malicious PDF files further supports this. No scripts were extracted, but the overall structure points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

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/431946152/how-to-hack-roblox-with-winrar-pc-game-hack In PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-cheatengine.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-free-codes-live.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/one-app-rewards-com-roblox-hack.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/esp-aimbot-wall-hacks-roblox-first-person-shooter-gui.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-valkyrie-helm-roblox.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-get-1b-free-robux.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-roblox-studio-on-mobile.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-get-free-antlers-in-roblox.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/noob-outfit-roblox-free.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-hack-robux-in-roblox-2021.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000042a0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x42A0 25224 bytes
SHA-256: 0f17427a29dd24b113ea9dd02b51402345cd70b1d798a5067a48daa2e83c8db2
font_01_sfnt_off00007d25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D25 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off000086d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86D6 19088 bytes
SHA-256: 541c7c61120fc7c368a6d4770341f3e47d0b1c5b06b4c7b74a4231b8c2746366