Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3f541a561adc478…

MALICIOUS

PDF

55.0 KB Created: 2021-06-09 13:33:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b33dc7ee8d64c67594817ce78da1b06d SHA-1: dd39c017a9a4add39f62b31fc8ae67fc5985328f SHA-256: a3f541a561adc478798a5f94b970d6a784bc7bdf1f7f39c11f83244d25369bde
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a malicious redirector lure, specifically targeting users interested in game hacks. The embedded URL, https://netcdn.tw/app/431946152/roblox-strucid-battle-royale-aimbot-hack-full-lua-game-hack, is flagged as malicious. The document body, though heavily obfuscated, contains references to game hacks and the same URL, reinforcing the lure. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9649

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 https://netcdn.tw/app/431946152/roblox-strucid-battle-royale-aimbot-hack-full-lua-game-hack In PDF document text
    • http://www.thecoffeebaron.co.za/images/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/free-roblox-app_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/robux-cheat_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/coin-master-cheats-without-verification_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/how-to-get-free-robux-on-windows-10-2021_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/blogspot-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/how-to-get-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/coin-master-generator-hack_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/script-executor-roblox-free_GM431946152.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005524.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5524 36344 bytes
SHA-256: 724d35e902c6e106d4b995dfe7ebacbef0b0317ee3c1d7d028f8eaa06c157b2f
font_01_sfnt_off0000a49d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA49D 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000b1ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1AE 19324 bytes
SHA-256: 0972018612482b0f74ab1624e93513eed2287e41cb259fd253ea46b1b00119b8

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