Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fbdc1aea4252711…

MALICIOUS

PDF

44.5 KB Created: 2021-06-03 08:30:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1c6cfcf24c13926c9f31a87df8fe4f43 SHA-1: 286e7afaa983b0cdee80bfebfde8fef288d307ea SHA-256: 0fbdc1aea4252711a0187b3891ccaf04acd3e9d8c5771417dacc019675315542
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 link farms for game hacks and free currency. The document body and embedded links suggest a lure for users seeking in-game advantages, which is a common tactic for phishing or malware distribution. The ML classifier strongly indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/coin-master-links-free-spins-game-hack
    • https://promoindihomejateng.com/ckfinder/userfiles/files/free-robux-generator-com-roblox-hack_GM431946152.pdf
    • https://promoindihomejateng.com/ckfinder/userfiles/files/free-spins-and-coins-coin-master-app_GM406889139.pdf
    • https://promoindihomejateng.com/ckfinder/userfiles/files/is-it-possible-to-get-free-robux_GM431946152.pdf
    • https://promoindihomejateng.com/ckfinder/userfiles/files/coin-master-daily-free-spins-and-coins_GM406889139.pdf
    • https://promoindihomejateng.com/ckfinder/userfiles/files/roblox-hack-download-pc_GM431946152.pdf
    • https://promoindihomejateng.com/ckfinder/userfiles/files/robux-free-gift-card-org-hack_GM431946152.pdf
    • https://promoindihomejateng.com/ckfinder/userfiles/files/free-robux-no-verification-needed_GM431946152.pdf
    • https://promoindihomejateng.com/ckfinder/userfiles/files/coin-master-free-stuff_GM406889139.pdf
    • https://promoindihomejateng.com/ckfinder/userfiles/files/rbxoffers-com-free-robux_GM431946152.pdf
    • https://promoindihomejateng.com/ckfinder/userfiles/files/free-executor-roblox_GM431946152.pdf
    • https://promoindihomejateng.com/ckfinder/userfiles/files/free-downloads-for-coin-master-daily-rewards_GM406889139.pdf
    • https://promoindihomejateng.com/ckfinder/userfiles/files/roblox-earn_GM431946152.pdf
    • https://promoindihomejateng.com/ckfinder/userfiles/files/coin-master-hack-unlimited-spins-and-coins-cheats_GM406889139.pdf
    • https://promoindihomejateng.com/ckfinder/userfiles/files/free-robux-without-human-verification-real_GM431946152.pdf
    • https://promoindihomejateng.com/ckfinder/userfiles/files/free-spins-and-coins-for-coin-master_GM406889139.pdf
    • https://promoindihomejateng.com/ckfinder/userfiles/files/coin-master-free-blogspot_GM406889139.pdf
    • https://promoindihomejateng.com/ckfinder/userfiles/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdf
    • https://promoindihomejateng.com/ckfinder/userfiles/files/how-to-get-free-robux-gift-cards_GM431946152.pdf
    • https://promoindihomejateng.com/ckfinder/userfiles/files/free-robux-sites-2021_GM431946152.pdf
    • https://promoindihomejateng.com/ckfinder/userfiles/files/coin-master-free-spins-cheat-codes_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052a2.bin
5e43fb4848d2a10bf5738d9d0a471cc3d28471a9a584432d8d4b33ff86e47424		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52A2 23936 bytes
font_01_sfnt_off00008823.bin
40e8d7361e944d312eaf05d83cc7aa11a1a2994eafa08e6f2d4005a25b536572		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8823 19384 bytes

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