Malicious PDF — malware analysis report

Static analysis result for SHA-256 cae71e2ce5ba15d7…

MALICIOUS

PDF

35.7 KB Created: 2021-07-04 23:04:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c4523d22a633022402c4bd36130b49ca SHA-1: bd0ed6de9e62a3ac141a3d747bb15fcbd67da917 SHA-256: cae71e2ce5ba15d756c195c880718153826a1150a7afdbdb1ac3c360e561c61d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one pointing to a known malicious redirector infrastructure. The document body and extracted URLs suggest a lure for free game items or hacks, likely intended to lead users to a malicious site. No scripts were extracted, but the presence of embedded URLs and the ML classifier's high confidence indicate a malicious intent to redirect users to potentially harmful content.

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/how-to-get-free-spins-on-coin-master-iphone-game-hack In PDF document text
    • https://lib.unitri.ac.id//repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-tiktok-likes-generator_GM835599320.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-coins-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/minecraft-java-free-account_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-make-an-audio-on-roblox-free_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-run-animation-roblox_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-vehicle-simulator-money-miles-hack_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/script-executor-roblox-free-download_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/cheate-pour-roblox_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-roblox-balc-hair-catlog_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/minecraft-free-install_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-hack-thru-premium-houses-in-roblox-pacifico_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/get-free-robux-for-watching-ads_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-free-in-app-purchases-jailbreak_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-supreme-roblox-shirt_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/how-to-get-free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-400-spin-link-today_GM406889139.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_off0000338d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x338D 23340 bytes
SHA-256: 66cc1264dbedcf1329446e7b8abf6302f32e06fb51a6c701462d0f980e90348e
font_01_sfnt_off00006878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6878 18504 bytes
SHA-256: fb94ba828be114796ce33ae88e534852be4d565d50d53dd599267a6729c84c7e

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