Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8925a0d3f6b3af3…

MALICIOUS

PDF

34.6 KB Created: 2021-06-26 20:47:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 16b4d4a5302c41f51b9730010b26f8ce SHA-1: 136f312d92797e340cf16f46ac14634870a6d342 SHA-256: f8925a0d3f6b3af3e55e5d2a826e77bce22105918c91b73f8313c69f78d8ab3f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector, disguised as a generator for game hacks and currency. The document body and heuristics indicate a lure for free in-game items, specifically targeting games like Roblox and Coin Master. The primary IOC is the malicious redirector URL, which is likely used to host or chain 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/tuto-roblox-hack-robux-2021-game-hack In PDF document text
    • http://www.manchieu.vn/upload/editor/files/coin-master-free-in-app-purchases-jailbreak_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/how-to-get-minecraft-for-free-on-xbox-360_GM479516143.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/roblox-how-to-get-items-for-free_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/redeem-free-robux-code_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/robux-today_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/roblox-how-to-play-paid-games-for-free_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/free-chest-coin-master_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/escape-school-obby-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/how-to-gift-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/coin-master-attack-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/which-pokemon-go-free-server_GM1094591345.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/jailbreak-script_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_off0000302f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x302F 22092 bytes
SHA-256: 08dc13789e798b6858d671685b85c3ed059053c58b323bc0ebdfa8ff565d93ed
font_01_sfnt_off00006133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6133 19300 bytes
SHA-256: 5d5ed49efe4b913d8674b9e0654ee4d222e97de9af630ff0959f1272a422dcbd

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