Malicious PDF — malware analysis report

Static analysis result for SHA-256 1224bc3c6e3e6c41…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 03:27:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fa16886fe340b81845a5bdcf5d92b855 SHA-1: 92157c6496987c44fcacb90c3369e86549b8fea8 SHA-256: 1224bc3c6e3e6c4188c65d992a9cfc0c5736e684d4e83657704b9fcff39e1588
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a malformed exploit stream and links to known malicious redirector infrastructure, specifically promoting a 'coin master hack'. The document body and embedded URLs suggest a lure for game-related cheats or generators, which is a common social engineering tactic. The primary malicious link is http://netcdn.tw/app/406889139/coin-master-hack-ios-no-verification-game-hack, which likely leads to a further exploit or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 5

  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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/coin-master-hack-ios-no-verification-game-hack In PDF document text
    • https://fib.ub.ac.id/sac/repository/piere-ware-hack-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/pubg-uc-shop-qatar_GM1330123889.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-how-to-use-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/rbx-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/game-give-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-december-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/download-roblox-for-free-online_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-mm2-hack-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-find-a-hacker-on-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/como-hackear-robux-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/cb-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-clothes-on-roblox-games_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-spin-hack-app_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-unlimited-spin-hack-mod-apk_GM406889139.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002ff4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FF4 22992 bytes
SHA-256: 8bce1c32abc92bff513a19125fd93e2bbd9a63b270e5241c51b1c13614f2b649
font_01_sfnt_off000063a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A1 18140 bytes
SHA-256: 107231c7cb9baf1876ef7d2eb5292770c6eafe728a2453bf7918a836eab472ab

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