Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0a86a4f64223a12…

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 10:45:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8c4dc2cfd2e5f9e3f1863b6888fa2db5 SHA-1: 5ce5d9559e46e285b2dee2c1b1fd4269468e495e SHA-256: f0a86a4f64223a127fa6c58be335cd4e777e639c164f3f6e3cf0a1ca06e7ebb1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier strongly indicated maliciousness, and the document body contains a URL that advertises a game hack. This suggests the PDF is intended to lure users to download a secondary payload or engage in a phishing scheme. No scripts were extracted from this sample.

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-spins-hack-2021-game-hack In PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-code-hack_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/hacks-to-steal-robux-sign-up_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/hack-jump-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-hacker-vs-pro_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/minecraft-story-mode-free-download_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/minecraft-skins-download-free_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/hacks-para-roblox-super-power-training-simulator_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-fast-speed-hack_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-online-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/flying-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-free-spin-group_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/dominus-rex-for-free-roblox-extreme-hacks_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/dungeon-quest-free-account-roblox_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_off0000330a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x330A 22204 bytes
SHA-256: 362860f4b65f1543cdde571b68b8918267ac3524e44012a5657d7a2d585e5112
font_01_sfnt_off00006472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6472 18580 bytes
SHA-256: 63d6adc7563b485c3174704ac8a7a6a262dc9bf1deaf17837918a23c7f43ebb5

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