Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cd86761cd0257c8…

MALICIOUS

PDF

35.4 KB Created: 2021-07-05 04:45:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bc5c39c32699745a00554793c256e166 SHA-1: c8b240d0a6f42aee24dde9290c32c4ae96826ac8 SHA-256: 9cd86761cd0257c89b9d2586311599500e9a17ccb23def0c55ae86b474701981
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs social engineering tactics by promising game hacks and free currency to lure users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which in turn hosts other malicious PDF files. The document's content and embedded links strongly suggest a phishing or scam campaign aimed at users interested in popular online games.

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.tw/app/431946152/roblox-rules-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/rbx-claim_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-pe-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-robux-rixty_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-comroblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-hacked-apk_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/body-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/lua-script-roblox-lumer-tycoon-2-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-admin-commands-in-any-roblox-game_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-roblox-executor-no-key_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-112-2-hacked-client_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-hacks-no-surveys_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/robuxy-com-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_off00003316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3316 23032 bytes
SHA-256: 29f4efe2ad977b28beec351e7eb766ced958529afcd74aea373dc9235208a18d
font_01_sfnt_off000066a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66A7 18628 bytes
SHA-256: 0af2336bfb8ad654c70bce51cc422f7999ba41cc76446f2b895758c4807c71c1