Malicious PDF — malware analysis report

Static analysis result for SHA-256 75f2c45488a7ad7d…

MALICIOUS

PDF

44.6 KB Created: 2021-05-16 13:15:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 585802de2361d0d04d96b55818239003 SHA-1: 86157c0d575a06bbc13edb24750961674ad685af SHA-256: 75f2c45488a7ad7db8c4eae766c5656bcf45332f3940e51d9bd0e81e107282d2
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of external links, many of which point to SEO-optimized PDF files related to game cheats and free items. The document body, though partially corrupted, contains references to 'free spins' and 'coin master links', suggesting a lure for users seeking in-game advantages. The presence of numerous external links and the ML classifier's high confidence score indicate a malicious intent, likely to direct users to scam websites or potentially download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/406889139/free-spins-coin-master-links-no-human-verification-game-hack PDF link annotation
    • http://rainbowbuddha.academy/images/get-free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/coin-master-firebird-card-free_GM406889139.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/minecraft-free-version_GM479516143.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/coin-master-hacks-and-cheats_GM406889139.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/easy-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/free-robux-games_GM431946152.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/coin-master-free-spins-2021-app-download_GM406889139.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/coin-master-free-spins-and-coins-today_GM406889139.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/dominus-roblox-free_GM431946152.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/free-coins-for-planet-master-game_GM406889139.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://rainbowbuddha.academy/images/free-robux-games-on-roblox_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_off000049de.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49DE 28176 bytes
SHA-256: 20571c9420ffa25aef2f61322cf9d64dba9f144725dccd6c4e306bbd2a24a1ea
font_01_sfnt_off00008b38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B38 18588 bytes
SHA-256: 5a08ca623146824177ccf371c197f16efef4c40a95708a9224bf5d86e8191d65

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