Malicious PDF — malware analysis report

Static analysis result for SHA-256 a545b0621a1a240d…

MALICIOUS

PDF

41.5 KB Created: 2021-05-17 09:12:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7e3ed894fbea7e60709f5da5b62a05a9 SHA-1: 1ee268dfa4a6b207c4a2aea9a9bd526b8ef2a034 SHA-256: a545b0621a1a240d5900a56d5b922e3bc0de4ceb5f8df95aa68a854edc03cd11
82 Risk Score

Malware Insights

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

The PDF document contains a high-confidence heuristic indicating it links to a 'free generator / game hack' redirector. The document body and numerous extracted URLs reinforce this lure, aiming to trick users into visiting malicious sites. The primary IOC is the external URI pointing to a site offering 'free robux'.

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/robuxy-com-free-robux-game-hack PDF link annotation
    • http://hotel-buta.by/images/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • http://hotel-buta.by/images/coin-master-game-legitimate-hack-without-signing-up-or-shareing_GM406889139.pdfIn PDF document text
    • http://hotel-buta.by/images/haktuts-coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://hotel-buta.by/images/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://hotel-buta.by/images/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://hotel-buta.by/images/roblox-fun-com-robux_GM431946152.pdfIn PDF document text
    • http://hotel-buta.by/images/coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://hotel-buta.by/images/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://hotel-buta.by/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://hotel-buta.by/images/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://hotel-buta.by/images/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://hotel-buta.by/images/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://hotel-buta.by/images/coin-master-gift-link_GM406889139.pdfIn PDF document text
    • http://hotel-buta.by/images/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://hotel-buta.by/images/free-coin-spin-daily-link-net_GM406889139.pdfIn PDF document text
    • http://hotel-buta.by/images/get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://hotel-buta.by/images/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://hotel-buta.by/images/free-spin-link-coin-master-app_GM406889139.pdfIn PDF document text
    • http://hotel-buta.by/images/master-hack-coin_GM406889139.pdfIn PDF document text
    • http://hotel-buta.by/images/how-to-hack-roblox-to-get-free-robux_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_off00004550.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4550 25144 bytes
SHA-256: 3521bc66f51cced81837f073d45174e11c8d093b614276bc2b8ccd090737b858
font_01_sfnt_off00007f86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F86 18452 bytes
SHA-256: 502ad6067225007cfeab5155f8ca615546b56d7ab4478b734f537abd02c25d18

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