Malicious PDF — malware analysis report

Static analysis result for SHA-256 7828f9323b7fe84f…

MALICIOUS

PDF

40.7 KB Created: 2021-05-20 00:19:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1e98cbcf80b9fae3ff962bead2e3faee SHA-1: db026d983ea145a9d17f6b5ea758370dbaa00263 SHA-256: 7828f9323b7fe84fbbf3b4670e2654e491db1d705edd2ce17a6ab4262c924682
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting game hacks and free currency. The ML classifier and specific PDF heuristics strongly indicate malicious intent. The document body and extracted URLs suggest a lure to trick users into visiting potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/free-gold-cards-coin-master-game-hack In PDF document text
    • http://kermas.eu/images/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://kermas.eu/images/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/roblox-generator_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/how-to-send-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://kermas.eu/images/best-free-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://kermas.eu/images/pokemon-go-free-pokecoins-hack_GM1094591345.pdfIn PDF document text
    • http://kermas.eu/images/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/coin-master-tricks_GM406889139.pdfIn PDF document text
    • http://kermas.eu/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/inappropriate-roblox-games_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/roblox-girl_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/minecraft-windows-10-key-free_GM479516143.pdfIn PDF document text
    • http://kermas.eu/images/earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://kermas.eu/images/roblox-person_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/minecraft-free-download-ipad_GM479516143.pdfIn PDF document text
    • http://kermas.eu/images/free-minecraft-capes-no-mods_GM479516143.pdfIn PDF document text
    • http://kermas.eu/images/coin-master-apk-hack-2021_GM406889139.pdfIn PDF document text
    • http://kermas.eu/images/collect-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://kermas.eu/images/free-robux-site_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
stream_003_off000046e1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46E1 24124 bytes
SHA-256: 2d6ac84339e20022d1fd74d466dc41fd1e8b064b74a7d81e9cbf1093ac8dc235
font_01_sfnt_off00007dcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DCB 17960 bytes
SHA-256: e7d6a33110c05f2f7358e31e331cf325c9b09bbae5ece44b659e3c4bfc76bc90

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