Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa271ef31ddb048e…

MALICIOUS

PDF

35.7 KB Created: 2021-07-04 04:20:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 02ffab20b69af9662ed099e1b1dd6d10 SHA-1: aa0e6b96b1aba0c315dec5e3bb524caf2cb04ddf SHA-256: aa271ef31ddb048e98ffab7965846dab91769a0efee6bf35f6ecb1fd2739c325
142 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, many of which are related to game hacks and free in-game currency, indicating a lure for potentially malicious downloads or scams. The heuristic findings strongly suggest an advance-fee scam and a link farm, with a high ML confidence score. The document body and extracted URLs reinforce the theme of obtaining free items for games, likely leading to malware or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/https-iosgodscom-topic-20214coinmasterhack-game-hack
    • https://www.levanajewelryclub.com/uploaded_files/userfiles/files/free-robux-gift-card_GM431946152.pdf
    • https://www.levanajewelryclub.com/uploaded_files/userfiles/files/greenlegocats-how-to-get-free-robux_GM431946152.pdf
    • https://www.levanajewelryclub.com/uploaded_files/userfiles/files/get-free-get-lol-roblox-shirt_GM431946152.pdf
    • https://www.levanajewelryclub.com/uploaded_files/userfiles/files/get-any-item-in-the-roblox-catolog-for-free_GM431946152.pdf
    • https://www.levanajewelryclub.com/uploaded_files/userfiles/files/roblox-hack-download_GM431946152.pdf
    • https://www.levanajewelryclub.com/uploaded_files/userfiles/files/how-to-get-free-robux-no-download-or-survey-2021_GM431946152.pdf
    • https://www.levanajewelryclub.com/uploaded_files/userfiles/files/hack-coin-master-apk-2021_GM406889139.pdf
    • https://www.levanajewelryclub.com/uploaded_files/userfiles/files/roblox-tix-factory-tycoon-hack_GM431946152.pdf
    • https://www.levanajewelryclub.com/uploaded_files/userfiles/files/free-spins-and-coins-coin-master-facebook_GM406889139.pdf
    • https://www.levanajewelryclub.com/uploaded_files/userfiles/files/free-robux-every-time-of-use_GM431946152.pdf
    • https://www.levanajewelryclub.com/uploaded_files/userfiles/files/script-for-free-admin-on-roblox_GM431946152.pdf
    • https://www.levanajewelryclub.com/uploaded_files/userfiles/files/free-robux-no-information_GM431946152.pdf
    • https://www.levanajewelryclub.com/uploaded_files/userfiles/files/coin-master-hack-tool-pc-download_GM406889139.pdf
    • https://www.levanajewelryclub.com/uploaded_files/userfiles/files/coin-master-free-coins-and-spins-2021_GM406889139.pdf
    • https://www.levanajewelryclub.com/uploaded_files/userfiles/files/coin-master-free-codes_GM406889139.pdf
    • https://www.levanajewelryclub.com/uploaded_files/userfiles/files/coin-master-free-spins-link-blogspot-april-2021_GM406889139.pdf
    • https://www.levanajewelryclub.com/uploaded_files/userfiles/files/how-to-save-drawings-in-free-draw-2-roblox_GM431946152.pdf
    • https://www.levanajewelryclub.com/uploaded_files/userfiles/files/coin-master-free-spins-deutsch-download-ios-link_GM406889139.pdf
    • https://www.levanajewelryclub.com/uploaded_files/userfiles/files/roblox-shionbi-life-max-lvl-hack-robloxdailt_GM431946152.pdf
    • https://www.levanajewelryclub.com/uploaded_files/userfiles/files/viper-venom-roblox-hacks_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000334d.bin
ce5a61a7cd0b7a0ac247c6d5079b528d740a9ddd3d32462b5b026afdf195253c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x334D 22648 bytes
font_01_sfnt_off0000660e.bin
08ea946be5fb008c0d7bd008b3af5890e72ea8b0061f58924028e5c31f25d00a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x660E 19244 bytes

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