Malicious PDF — malware analysis report

Static analysis result for SHA-256 db3c53124f62f2c3…

MALICIOUS

PDF

34.4 KB Created: 2021-07-03 11:04:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a19df9d10d9d8fb883e30b7c1671ab84 SHA-1: d4aa6fb115649c90b33b19a717f83d4a1bf1eea4 SHA-256: db3c53124f62f2c3ebb6fab0879ba868e0e5c74eb3ca473f3c3d303918ddbe11
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, disguised as cheats for popular games like Coin Master and Roblox. The document body and embedded URLs strongly suggest a lure for users seeking free in-game currency or hacks, which is a common social engineering tactic. The ML classifier also flagged this PDF with high confidence, indicating malicious intent.

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/406889139/cheats-to-get-free-spins-on-coin-master-game-hack In PDF document text
    • https://serviceaccctvjogja.com/ckfinder/userfiles/files/minecraft-ps4-free_GM479516143.pdfIn PDF document text
    • https://serviceaccctvjogja.com/ckfinder/userfiles/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://serviceaccctvjogja.com/ckfinder/userfiles/files/coinmaster_GM406889139.pdfIn PDF document text
    • https://serviceaccctvjogja.com/ckfinder/userfiles/files/hack-roblox-free-admin_GM431946152.pdfIn PDF document text
    • https://serviceaccctvjogja.com/ckfinder/userfiles/files/free-catalog-roblox-script_GM431946152.pdfIn PDF document text
    • https://serviceaccctvjogja.com/ckfinder/userfiles/files/hack-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • https://serviceaccctvjogja.com/ckfinder/userfiles/files/how-to-get-unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • https://serviceaccctvjogja.com/ckfinder/userfiles/files/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://serviceaccctvjogja.com/ckfinder/userfiles/files/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://serviceaccctvjogja.com/ckfinder/userfiles/files/op-rewards-roblox-hack_GM431946152.pdfIn PDF document text
    • https://serviceaccctvjogja.com/ckfinder/userfiles/files/free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • https://serviceaccctvjogja.com/ckfinder/userfiles/files/como-hackear-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://serviceaccctvjogja.com/ckfinder/userfiles/files/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • https://serviceaccctvjogja.com/ckfinder/userfiles/files/roblox-is-hacker_GM431946152.pdfIn PDF document text
    • https://serviceaccctvjogja.com/ckfinder/userfiles/files/robux-hack-on-wish_GM431946152.pdfIn PDF document text
    • https://serviceaccctvjogja.com/ckfinder/userfiles/files/anime-free-roblox_GM431946152.pdfIn PDF document text
    • https://serviceaccctvjogja.com/ckfinder/userfiles/files/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://serviceaccctvjogja.com/ckfinder/userfiles/files/free-rich-roblox-accounts-passwords-2021_GM431946152.pdfIn PDF document text
    • https://serviceaccctvjogja.com/ckfinder/userfiles/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://serviceaccctvjogja.com/ckfinder/userfiles/files/how-to-get-free-minecraft-skins_GM479516143.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_off0000320a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x320A 22364 bytes
SHA-256: 14d8075cd4e6ec03a01465171753df85a1fbe7b9738b35f4f417506c1edd9712
font_01_sfnt_off000063a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A5 18340 bytes
SHA-256: 61fe66d38e523e96b028de00a3a09c91b345645f12b39cddb419abbe350913d0

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