Malicious PDF — malware analysis report

Static analysis result for SHA-256 361fb4a36d0f8d88…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 22:46:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 59b073b89b55d190bda051240ce4c0cc SHA-1: b5fce5027b4e892408c11f72a340fbd3eb76dc29 SHA-256: 361fb4a36d0f8d8852b5b48eeee7ab5e276aafedfc07a95b2f448eb9e6e453c6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirector infrastructure, specifically http://netcdn.tw/app/406889139/free-spins-coins-coin-master-game-hack. The document body and embedded URLs suggest a lure for free game currency or hacks, which is a common social engineering tactic. The ML classifier also strongly indicated maliciousness.

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/free-spins-coins-coin-master-game-hack In PDF document text
    • http://www.readandenjoy.ae/userfiles/files/how-to-get-vip-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/20-free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/free-coin-master-s_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/hack-pour-roblox_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/free-gfx-roblox_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/coin-master-free-coins-and-spins-today_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/daily-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/get-robux-com_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/bleu-roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/how-to-get-free-robux-easy-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/hacks-for-mm2-in-roblox-2021_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
stream_002_off000030d9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30D9 23048 bytes
SHA-256: e69a115f8b77eaa9658d57ec8e249146ad6769e3cc142ac86125924c51a449c7
font_01_sfnt_off00006460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6460 18176 bytes
SHA-256: e8ec895f495d139acdb298d515a7ca0fffd25b58e102aa71b0a100d8abb1bbce

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