Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b2439d55a593096…

MALICIOUS

PDF

41.8 KB Created: 2021-05-13 20:02:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 203e3a19ac0bfd9444d4d9ed1d8afdf3 SHA-1: 8ba24c4a07fc83f2241b7be3e7fd1a2ba87d8f5c SHA-256: 9b2439d55a5930961848e402ed384ba46c2ae8066a898393ab50f26e9dd74b8a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a call-to-action phrase, directing users to websites offering 'free Robux' or game hacks. The ML classifier and heuristics strongly indicate malicious intent, likely to redirect users to a phishing or malware distribution site. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/free-robux-no-downloading-apps-game-hack PDF link annotation
    • http://nosocomium.rv.ua/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://nosocomium.rv.ua/images/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://nosocomium.rv.ua/images/free-coin-app_GM406889139.pdfIn PDF document text
    • http://nosocomium.rv.ua/images/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://nosocomium.rv.ua/images/how-to-get-free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • http://nosocomium.rv.ua/images/free-400-spins-coins-master_GM406889139.pdfIn PDF document text
    • http://nosocomium.rv.ua/images/spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://nosocomium.rv.ua/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://nosocomium.rv.ua/images/free-roblox-accessories_GM431946152.pdfIn PDF document text
    • http://nosocomium.rv.ua/images/coinmaster-links_GM406889139.pdfIn PDF document text
    • http://nosocomium.rv.ua/images/free-robux-please_GM431946152.pdfIn PDF document text
    • http://nosocomium.rv.ua/images/avatar-roblox-game_GM431946152.pdfIn PDF document text
    • http://nosocomium.rv.ua/images/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://nosocomium.rv.ua/images/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://nosocomium.rv.ua/images/robux-game_GM431946152.pdfIn PDF document text
    • http://nosocomium.rv.ua/images/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://nosocomium.rv.ua/images/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://nosocomium.rv.ua/images/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://nosocomium.rv.ua/images/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://nosocomium.rv.ua/images/how-to-get-free-robux-com_GM431946152.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_off00004541.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4541 24960 bytes
SHA-256: 4edf4868531f6fee121070d26d9e5d026ac5d44a7398562cad1bfeb011a5b70c
font_01_sfnt_off00007daa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DAA 19404 bytes
SHA-256: 49b6dfa9b56ae39db803e39cb2f1ecc2093e69bc279e239e32c5359198169209

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