Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ed0512fb51ec3cb…

MALICIOUS

PDF

34.3 KB Created: 2021-07-04 18:02:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2de7334e77ddf6cd3a55c7893ab173f5 SHA-1: 2fcbf9299b1013397b031e2d56111251c9ebe665 SHA-256: 3ed0512fb51ec3cbadf3b6a274250cb41917dcd86ba418368b1f9c9a89c05222
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector at http://netcdn.tw/app/431946152/how-to-get-infinite-robux-game-hack. The document body and heuristics indicate a lure for game-related cheats, specifically for Robux. The presence of embedded URLs and the ML classifier's high confidence score support this assessment. No scripts were extracted from this sample.

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/how-to-get-infinite-robux-game-hack In PDF document text
    • http://muslib.unmus.ac.id//repository/cpbildco-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-hack-gui-tutorial_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/whats-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-hack-tool-for-pc_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-free-animatins_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-robux-no-hacks-glitches-or-troll_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-hack-roblox-weight-lifting-sim_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-promo-code-hack-2021-pastebin_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-map_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-download-hack-ios_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/hack-coin-master-ios-download_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-20210-robux-download_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/hack-fr-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/robux-free-for-android_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/giving-away-free-toy-codes-for-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/download-roblox-free-windows-10_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00002fc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC4 22452 bytes
SHA-256: 6cb511ade7bc0ce5848eca6731e608bc9f67971fedcfb102724c8906ffc59f88
font_01_sfnt_off00006119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6119 18940 bytes
SHA-256: 4ecfdb40bf37a08127f03997f4977f5df26c022209d08e9f120eb32a8243af90