Malicious PDF — malware analysis report

Static analysis result for SHA-256 b25ffb3a26832be3…

MALICIOUS

PDF

34.0 KB Created: 2021-07-02 02:07:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 208dfd47d229cf55b47842a94d3bb2ef SHA-1: c901b6561e051b3366b6eca003830974f71312ec SHA-256: b25ffb3a26832be3be7a6773e9aea4368989939c0d784a50c67de1911761adec
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to potentially malicious infrastructure, masquerading as free game hacks and generator sites. The ML classifier strongly indicated maliciousness, and the presence of redirector links confirms a lure-based attack pattern. No scripts were extracted, but the document's structure and embedded URLs suggest it is designed to lead users to malicious websites.

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/cool-roblox-outfits-free-game-hack In PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-city-free-game_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-tiktok-fans-hack_GM835599320.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/lazyblocks-com-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/www-mistplay-com-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-free-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-do-you-make-your-own-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/pro-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-phantom-forces-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-arcane-adventures-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-get-new-outfit-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-to-get-free-roblox-hair_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-no-apps-or-surveys_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/roblox-its-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/play-roblox-for-free-online-now_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/if-everything-on-roblox-was-free-part-2_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_off00002d80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D80 22572 bytes
SHA-256: 94ac8b26de87250eb5edd89791d7f87473493e4513814b9676728993b58828c9
font_01_sfnt_off00005ff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF4 19012 bytes
SHA-256: d224414f9931e66ebc3094b58abfb7a73f51aeebcd354f48a90e05b0f38f62ca

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