Malicious PDF — malware analysis report

Static analysis result for SHA-256 6745db099f42ff5d…

MALICIOUS

PDF

35.3 KB Created: 2021-06-25 10:41:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d3eb548b0e579282c5d62749a92b7b83 SHA-1: 6647d3d85524c00ac36eb73d6e53045fe8130c78 SHA-256: 6745db099f42ff5db6f7a7988d68f575378e605e46229bae6f0a0ad9aff2835e
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external resources, many of which are presented as "free hacks" or "free accounts" for popular games like Roblox and Coin Master. The primary URL, http://netcdn.co/app/431946152/roblox-hack-tool-download-2021-game-hack, directly advertises a "Roblox Hack Tool Download 2021", indicating a likely attempt to trick users into downloading malware. The ML classifier also flagged this PDF as malicious with high confidence.

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 http://netcdn.co/app/431946152/roblox-hack-tool-download-2021-game-hack
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/how-many-levels-are-there-in-coin-master_GM406889139.pdf
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdf
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/get-free-spins-coin-master_GM406889139.pdf
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/free-robux-accounts_GM431946152.pdf
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/get-free-robux-no-human-verification_GM431946152.pdf
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/roblox-hack-apk-android-2021_GM431946152.pdf
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/coin-master-links-free-spins_GM406889139.pdf
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/free-minecraft-hacks_GM479516143.pdf
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/free-robux-without-human-verification_GM431946152.pdf
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/free-coin-spin-coin-master_GM406889139.pdf
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/free-robux-no-verification_GM431946152.pdf
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/master-coin-hack-mod_GM406889139.pdf
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/hack-xp-net-generators-coin-master_GM406889139.pdf
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/auto-clicker-for-mac-roblox-free_GM431946152.pdf
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/are-there-cheats-on-roblox-arsenal_GM431946152.pdf
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/can-a-developer-give-free-gamepasses-roblox_GM431946152.pdf
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/is-it-possible-to-get-free-robux_GM431946152.pdf
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/free-roblox-alt-accounts_GM431946152.pdf
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/youtube-how-to-get-free-robux-no-hack_GM431946152.pdf
    • https://www.bpdbali.co.id/new/public/ckfinder/userfiles/files/mcpe-free-download_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000328b.bin
13cd0ff0040e98cd8b23824d3b1aac43ede77abb5f0dd88691e948c0c2ffb0b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x328B 21944 bytes
font_01_sfnt_off00006312.bin
e1aaaed025fb1b7e5dde25631629033a3e83c34e69b7db691dca566edf77427d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6312 19564 bytes

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