Malicious PDF — malware analysis report

Static analysis result for SHA-256 b56524372923f097…

MALICIOUS

PDF

35.9 KB Created: 2021-07-05 14:51:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1a51833b0c76b7acfbce4d44d09b12b0 SHA-1: 8b14924531dd7c673127e10b5c2f1ce3694da829 SHA-256: b56524372923f097630b1c7227e18c9a7e8104517cbc91f658beeb50c5801e39
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one that redirects to malicious infrastructure, promising free game hacks. The ML classifier and specific PDF heuristics strongly indicate malicious intent. While no scripts were explicitly extracted, the document's structure and embedded URLs suggest it is designed to trick users into visiting malicious sites, likely for credential harvesting or further malware delivery.

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/431946152/best-free-roblox-executor-game-hack In PDF document text
    • https://lib.insan-unggul.ac.id/repository/best-admin-hack-for-roblox_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/hack-richest-roblox-account-deleted_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/roblox-free-accessories-codes_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/how-to-get-free-clothes-on-roblox-2021-on-phone_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/how-to-hack-someones-account-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/hackear-robux-gratis_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/roblox-hunter-x-hunter-lvl-hack_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/roblox-blox-pice-hacks_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/do-roblox-employees-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/roblox-free-play-bloxburg_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/how-to-get-free-clothes-on-roblox-2021-without-bc_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-minecraft-bedrock-server_GM479516143.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/krnl-roblox_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/how-to-make-a-group-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/facebook-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/coin-master-money-hack_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/descargar-hacks-para-roblox-2021-sin-parchear_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-roblox-gift-card-codes-workind-in-2021_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00003513.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3513 22820 bytes
SHA-256: 0b54fce9f5f509949f9f67af32f166f89587621533bd5bbe0a8785a522fa429d
font_01_sfnt_off000067fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67FE 18896 bytes
SHA-256: b068693695ac9092ad6abe57a91b58dd13aa3e316adee39bbb6f8e267804ee4f

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