Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d362a1ea329d06b…

MALICIOUS

PDF

39.8 KB Created: 2021-05-19 16:54:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4f22d72dd358232cd7ccc8bf85216031 SHA-1: 55e294c47a168723f1969951aa7672672d137809 SHA-256: 2d362a1ea329d06b975c04864446696418d228988fbca2f2b2d5a43cc67e10d5
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links to external websites, many of which are presented as free game cheats or hacks. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a link farm designed to attract users. The ML classifier also flagged this PDF as malicious with high confidence. The document body contains garbled text but includes a URL that aligns with the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 3

  • 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.
  • 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/minecraft-xbox-360-free-game-hack
    • https://bwsrubber.com/image/data/files/free-robux-no-verification_GM431946152.pdf
    • https://bwsrubber.com/image/data/files/how-to-get-free-outfits-on-roblox_GM431946152.pdf
    • https://bwsrubber.com/image/data/files/coin-master-daily-free-spins-link-haktuts_GM406889139.pdf
    • https://bwsrubber.com/image/data/files/haktuts-coin-master-free-daily-spins_GM406889139.pdf
    • https://bwsrubber.com/image/data/files/free-coin-master-spin-app_GM406889139.pdf
    • https://bwsrubber.com/image/data/files/roblox-sexually_GM431946152.pdf
    • https://bwsrubber.com/image/data/files/easy-ways-to-get-free-robux_GM431946152.pdf
    • https://bwsrubber.com/image/data/files/roblox-devil_GM431946152.pdf
    • https://bwsrubber.com/image/data/files/coin-master-daily-free-spins-today_GM406889139.pdf
    • https://bwsrubber.com/image/data/files/free-robux-ad_GM431946152.pdf
    • https://bwsrubber.com/image/data/files/coin-master-coins-hack_GM406889139.pdf
    • https://bwsrubber.com/image/data/files/does-roblox-premium-expire_GM431946152.pdf
    • https://bwsrubber.com/image/data/files/will-minecraft-ever-be-free_GM479516143.pdf
    • https://bwsrubber.com/image/data/files/free-gold-cards-coin-master_GM406889139.pdf
    • https://bwsrubber.com/image/data/files/robux-hack_GM431946152.pdf
    • https://bwsrubber.com/image/data/files/coin-master-hack-no-verification-ios_GM406889139.pdf
    • https://bwsrubber.com/image/data/files/coin-master-free-daily-spins_GM406889139.pdf
    • https://bwsrubber.com/image/data/files/how-to-get-free-robux-on-chromebook_GM431946152.pdf
    • https://bwsrubber.com/image/data/files/card-hack-in-coin-master_GM406889139.pdf
    • https://bwsrubber.com/image/data/files/free-spins-coin-master-daily_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bb7.bin
da99d236e77bf01db5813cbad4c164e77d6f4e06658e5b42a0f5e323094130f5		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BB7 25460 bytes

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