Malicious PDF — malware analysis report

Static analysis result for SHA-256 58566fe9882dac1b…

MALICIOUS

PDF

34.1 KB Created: 2021-07-03 14:41:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f3bab853a1c53a1221f09afd4dc5e451 SHA-1: 8b2d00e83677780508658d382929ed6260331818 SHA-256: 58566fe9882dac1bbfdbbd04664b241366e90ff56f86599bff5c1142780239da
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/431946152/roblox-how-to-hack-roblox-accounts-game-hack. This redirector is designed to lure users with promises of game hacks and free in-game currency, likely leading to further malicious sites or downloads. The document body and heuristics strongly indicate a social engineering tactic to trick users into clicking these links.

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/roblox-how-to-hack-roblox-accounts-game-hack In PDF document text
    • http://library.unissula.ac.id/fe/repository/roblox-robux-hack-xbox-one_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/how-to-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-app_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-bypass-cheat-engine-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-get-free-robux-for-no-cost_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/roblox-a_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-hack-copy-game_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-get-the-hacked-face-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-cheats-for-free-spins_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-console-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/robux-for-kids_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-hack-coin-master-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-free-spins-fb-champion_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-make-shirts-on-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-robux-no-human-verification-no-lie_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
font_00_sfnt_off00002f0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F0D 22156 bytes
SHA-256: febf2582a14ed2d34a7ee92168a843de275a8f6d8357cc62e0bed7b35d591321
font_01_sfnt_off0000601e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x601E 19064 bytes
SHA-256: 8e32136e9c38232fa7a7a8383811c81857c2054982e18bc1c19ce881bbddb298