Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae90c0a4bfcdd31c…

MALICIOUS

PDF

33.0 KB Created: 2021-07-04 23:59:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8fd2b9a12f12b0ee94eaa2e951f2c303 SHA-1: 624c03a39251ebfbe27e8f7a9c0f84a09a0da1c0 SHA-256: ae90c0a4bfcdd31cee8e6c7607ec4b7534536ecad9f42d473be866ce82ce256b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains links that redirect to known malicious infrastructure, specifically promoting game hacks and free in-game currency. The presence of a visual download button and the ML classifier's high confidence score indicate a malicious intent to lure users into clicking these links. While no scripts were explicitly extracted, the nature of the links suggests a potential for further exploitation or download of malicious 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/hack-coin-master-using-cheat-engine-game-hack In PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/rlbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/code-how-to-get-50-free-crystals-roblox-miners-haven_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/can-i-have-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-glitch_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/hacks-minecraft_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/minecraft-windows-10-free-trial_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/will-minecraft-ever-be-free_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/facebook-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/minecraft-toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/buxblast-com-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/this-app-gives-you-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/flip-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/rewards-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-link-spin_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
font_00_sfnt_off00002ca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CA6 22236 bytes
SHA-256: cd91638aad35e965f409b787603dfa3c016641280367e10d05347680cf749afc
font_01_sfnt_off00005df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF0 18356 bytes
SHA-256: ead7cc48693e881bf0d58c4c199a57cb596f3da89d9a8554fc95b20930c97b4f

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