Malicious PDF — malware analysis report

Static analysis result for SHA-256 847516a51a4f14a6…

MALICIOUS

PDF

43.7 KB Created: 2021-05-15 00:34:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ce91a6ea80f1718239d5162e083430b7 SHA-1: b163396a7b0c082f0542bc21d955784f8f431114 SHA-256: 847516a51a4f14a66ba7947bfca9eb16917d35263b6e516251afca1b2290f212
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/431946152/roblox-games-that-give-you-free-robux-game-hack PDF link annotation
    • https://www.gymun.cz/images/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • https://www.gymun.cz/images/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/how-to-make-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/coin-master-hack-coins_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/hack-card-collection-coin-master_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/2021-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/coin-master-vip-hack_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/collect-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/roblox-com-r_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/coin-master-game-hack-app_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b1c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B1C 25596 bytes
SHA-256: 3e86908862b6e6b8f3ed05fa35d4b2e7103e48c2982c59cf4cdbeefc581e7478
font_01_sfnt_off000085d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85D1 19240 bytes
SHA-256: af18d9cb6acc741702b59c78a5d378fdddaa2c6ad6fac2421576a1d1ac5dc213

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