Malicious PDF — malware analysis report

Static analysis result for SHA-256 450b27d87da8cb80…

MALICIOUS

PDF

33.6 KB Created: 2021-06-26 06:37:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a447e503cb6940c2d82e174c7823c69b SHA-1: 22c12313e254807f9085fbf7011b53b5ee930202 SHA-256: 450b27d87da8cb80cadf6c150945eda6729935ca44ac589bed4468c99685ccbb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document employs a lure of game hacks and free in-game items to trick users into clicking malicious links. The document contains multiple embedded URLs, including one pointing to known malicious redirector infrastructure, which likely serves to download and execute a second-stage payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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-weight-lifting-sim-in-roblox-game-hack In PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-clockwork-shades-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/toolbox-for-minecraft-ios_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-live_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-earn-robux-fast_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-free-catalog-hacks-thumbnail_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-roblox-clothes-boy_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-guest-clothes-free_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-free-spins-link-october-2021_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/google-site-roblox-hack-get-free-robux-right-now-online_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/trouver-la-partie-dun-joueur-roblox-hack_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-speed-hack-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-spin-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/freegames911com-coinmastertipsandcheats2021freecoinsandspins_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-spin-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-free-pets-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/pubg-uc-zain_GM1330123889.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002bd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BD5 22156 bytes
SHA-256: f545784395f8db59838f20929dbf24113c89eca0bcb517af12f58e539b9cc7ac
font_01_sfnt_off00005cfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CFC 19668 bytes
SHA-256: 9400ddf9a94b02615d9cb4c2da5a6e53a6b070c245561410e6e5d6032a49b214

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