Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e50bc07f609d46b…

MALICIOUS

PDF

36.6 KB Created: 2021-07-05 22:46:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1460ef8b462862496ffac06c1b5ed9d3 SHA-1: a1527b26b247026989e717e3acdb827aecfa6327 SHA-256: 7e50bc07f609d46b4a26ad66b18b6def03711dbc1096fb1f1b51a86cfd539d68
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to 'netcdn.tw', which is flagged as a malicious redirector. The document body and extracted URLs suggest a lure related to game hacks and free currency, aiming to trick users into clicking malicious links. No scripts were extracted, but the presence of malicious redirectors and the lure indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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/406889139/coinmasterfreespins-game-hack In PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-memes_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/generator-robux-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/code-pin-free-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/dungeon-quest-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-play-online-for-free-no-download_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-500-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/rthro-roblox-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-comroblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-roebucks_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/best-free-clothing-for-roblox-war-group_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-money-on-roblox-bloxburg-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-hack-mobile_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/someone-hacked-my-roblox-account-took-all-my-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/fly-hack-download-roblox-2021-gameguardian_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-ps4-free_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/http-appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-no-generator-or-survey_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FFF 22528 bytes
SHA-256: bff39ed0063a1d983986532de672d28e5e5c0858133c82b25dd89f5ac36e27f1
font_01_sfnt_off00006264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6264 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00006c49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C49 18272 bytes
SHA-256: 07d1048110b648044dfdf05b80b578e3dafb2e438d2dd29495699789e7328ffb

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