Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f80854476ddb052…

MALICIOUS

PDF

35.7 KB Created: 2021-07-08 19:02:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 94b9c7fb478e8809f66292554463abe0 SHA-1: a749254e720823b40bb955be7be3b812027060e7 SHA-256: 3f80854476ddb052f4434dbeb53b234327c84fd56aca54aa1b4755d0b97e1882
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains numerous embedded URLs and a prominent external URI pointing to sites offering free in-game currency and hacks for popular games. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of a malicious workflow. The presence of these lures suggests the document is designed to trick users into visiting malicious sites, likely for credential harvesting or 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/how-do-you-get-free-robux-without-paying-game-hack In PDF document text
    • http://digilib.uim.ac.id/repository/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/roblox-tycoon-hack-money_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/pubg-uc-telegram_GM1330123889.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/youtubers-hacking-roblox_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/claim-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-get-free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/online-games-roblox-free_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-get-to-village-3-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/roblox-op-weapons-in-your-inventory-hack_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-make-your-own-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/is-it-cheating-to-use-a-autoclicker-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/hack-roblox-gameplay_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/websites-that-give-you-free-robux_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_off000030eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30EB 22648 bytes
SHA-256: 913ffa8c5710dc9e7b871441eadd04d6b9b30682146a20c2c0a2c0acce085a06
font_01_sfnt_off00006368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6368 20132 bytes
SHA-256: a9ef46bf9427767a57211f84010808dc7dc7e4c48ad05ca9a6e16d4f2e8bde0e

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