Malicious PDF — malware analysis report

Static analysis result for SHA-256 225a400e31d7efb3…

MALICIOUS

PDF

45.9 KB Created: 2021-05-16 14:16:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6f19fc9fcb1e7271a5375ee047061eb5 SHA-1: 5270f770aceaf48ea1de5c756c0b6932aeabca3f SHA-256: 225a400e31d7efb3baa2bba70b654e7ccccdebb97a2813f12cc92f22ed58ce80
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are structured as SEO-optimized PDF gateways for game-related cheats and currency. The presence of a direct link to 'roblox36.com-free-robux-game-hack' and a high ML classifier score indicate a malicious intent to redirect users to potentially harmful content. The document body, though partially garbled, contains keywords related to these lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/431946152/roblox36.com-free-robux-game-hack PDF link annotation
    • http://rgadventure.com/userfiles/files/coin-master-fan-page-giveaway_GM406889139.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/coin-master-free-food_GM406889139.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/coin-master-link-daily-get-free-spins-amp_GM406889139.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/robloxbux-us-generator_GM431946152.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/minecraft-windows-10-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/free-spins-coin-master-app-iphone_GM406889139.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/how-to-get-minecraft-bedrock-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/coin-master-free-spin-app-reviews_GM406889139.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a82.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A82 25316 bytes
SHA-256: e4b0a3f6682dd59116cf983a9af1d60860d414d0a3fbf347c5313c944c1c43f5
font_01_sfnt_off00008545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8545 2948 bytes
SHA-256: e2af7e92c7ac799394a91e33f46ee6b8571fd032db5a74648a13a3ee3b177906
font_02_sfnt_off00008f6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F6B 18756 bytes
SHA-256: 75a7293df35b739ae2294dba45007dab7b7658b4df7c6a7e046c10781a1fd260

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