Malicious PDF — malware analysis report

Static analysis result for SHA-256 223ba61a7f8cc920…

MALICIOUS

PDF

34.0 KB Created: 2021-07-04 13:11:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 994976bfb61842ec96d4853902785726 SHA-1: 1c5f31694f36447579453c6c86d67aec9c9a3fbb SHA-256: 223ba61a7f8cc920e6febc5c6d1a5009e7e51a2a7a5a01f05b284e8082ac39d4
160 Risk Score

Malware Insights

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

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising a 'Coin Master Working Hack'. The presence of a download button lure and the ML classifier's high confidence score indicate a malicious intent to trick users into visiting these sites. The document's content and embedded URLs suggest a social engineering tactic to drive traffic to potentially harmful content or further malware downloads.

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/coin-master-working-hack-game-hack In PDF document text
    • http://lib.kesdammedan.ac.id/repository/how-to-hack-gta-on-roblox-mobile_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/free-roblox-hoodie-template_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/roblox-hack-scripts-pastebin-grab-knife_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/increible-hack-de-robux_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/hack-for-roblox-wont-get-banned_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/coin-master-free-spins-link-deutsch-ios_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/minecraft-free-no-virus_GM479516143.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/easy-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/mcpe-master-hack-unlimited-coins_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/roblox-script-hacks_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/roblox-hack-patch-fix_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 7

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
font_00_sfnt_off0000300e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x300E 22580 bytes
SHA-256: c5d51dd97ab33f5a46d53f895e6e4d4d7038676c13141d11f3c78b64ecc21ba6
font_01_sfnt_off00006247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6247 18204 bytes
SHA-256: c0d48818ffdaf61c16224bc7da9184709f9ce3d52e3b4ea6b6c72b3114ee60e3

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