Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d5b1672ddd38d72…

MALICIOUS

PDF

35.3 KB Created: 2021-07-07 17:11:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 225e0955a812b939ea7662207b28c16c SHA-1: 2c0a55285f72639c8df0908e6e9d9bb604ec96f7 SHA-256: 6d5b1672ddd38d7253f0816fdc26656bc26b6c88fa000ed7f4434efa9fce70b3
102 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on domains related to game cheats and hacks for popular games like Coin Master and Roblox. The document body and embedded URLs suggest a lure for users seeking in-game currency or cheats, which is a common social engineering tactic. The ML classifier also strongly indicated maliciousness.

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.tw/app/406889139/coin-master-hack-no-human-verification-2021-game-hack
    • https://infopromotransvision.com/ckfinder/userfiles/files/roblox-promo-codes-for-free-robux_GM431946152.pdf
    • https://infopromotransvision.com/ckfinder/userfiles/files/how-to-get-free-robux-without-verification-2021_GM431946152.pdf
    • https://infopromotransvision.com/ckfinder/userfiles/files/coin-master-game-android-free-download_GM406889139.pdf
    • https://infopromotransvision.com/ckfinder/userfiles/files/how-to-get-free-robux-on-computer_GM431946152.pdf
    • https://infopromotransvision.com/ckfinder/userfiles/files/how-to-make-money-on-roblox-cheats_GM431946152.pdf
    • https://infopromotransvision.com/ckfinder/userfiles/files/roblox-polo-ralph-lauren-free-shirt_GM431946152.pdf
    • https://infopromotransvision.com/ckfinder/userfiles/files/coin-master-free-coins_GM406889139.pdf
    • https://infopromotransvision.com/ckfinder/userfiles/files/coin-master-free-coins-link-blogspot_GM406889139.pdf
    • https://infopromotransvision.com/ckfinder/userfiles/files/robux-app-free_GM431946152.pdf
    • https://infopromotransvision.com/ckfinder/userfiles/files/how-to-get-free-robux-hack_GM431946152.pdf
    • https://infopromotransvision.com/ckfinder/userfiles/files/mcpe-master-coins-hack_GM406889139.pdf
    • https://infopromotransvision.com/ckfinder/userfiles/files/how-to-get-free-snacks-in-coin-master_GM406889139.pdf
    • https://infopromotransvision.com/ckfinder/userfiles/files/minecraft-items_GM479516143.pdf
    • https://infopromotransvision.com/ckfinder/userfiles/files/how-to-get-clothes-for-free-roblox_GM431946152.pdf
    • https://infopromotransvision.com/ckfinder/userfiles/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdf
    • https://infopromotransvision.com/ckfinder/userfiles/files/coin-master-free-spin-app-2021_GM406889139.pdf
    • https://infopromotransvision.com/ckfinder/userfiles/files/roblox-report-hacker_GM431946152.pdf
    • https://infopromotransvision.com/ckfinder/userfiles/files/fly-hack-roblox-script-2021_GM431946152.pdf
    • https://infopromotransvision.com/ckfinder/userfiles/files/coin-master-free-spins-link-2021-today_GM406889139.pdf
    • https://infopromotransvision.com/ckfinder/userfiles/files/roblox-free-level-7-script-executor_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003241.bin
eab2b453bd8ef679781fe04a17b5878d5d4a85df817f6fc804aefaf65a523663		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3241 22804 bytes
font_01_sfnt_off00006573.bin
a7529eedff3e399852376b8c12ef87d60bbe4ae3f7bf708f76a8d47e7c034202		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6573 18940 bytes

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