Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8c34eb0e3c3b2d4…

MALICIOUS

PDF

36.1 KB Created: 2021-05-23 01:05:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d860a393b1b22cff1209c29308e810ea SHA-1: 86e48d1f6e78e751de57bc78669a2a0725c16739 SHA-256: f8c34eb0e3c3b2d4747231128e3097fffd49ccdf0d18715f0b47207262a1f176
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links, including one that explicitly advertises a 'free Minecraft Premium Account' and 'game hack'. This lure is designed to trick users into clicking the link, which leads to a URL associated with malicious content. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/479516143/free-minecraft-premium-account-game-hack PDF link annotation
    • http://prazdnik-kzn.ru/images/minecraft-hacks-xbox-one_GM479516143.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/free-script-executor-roblox_GM431946152.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://prazdnik-kzn.ru/images/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
    • https://youtuIn 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_002_off000033e1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33E1 24656 bytes
SHA-256: bcfa0551182956127bc14caf9194a179f1427dc31f4261422cc46599c10f710f
font_01_sfnt_off00006c33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C33 18264 bytes
SHA-256: d2b91c2a6de84c5c57e6f7a8c0463896f89b33dea675ffd93dbde2c8d35c79e1

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