Malicious PDF — malware analysis report

Static analysis result for SHA-256 901c0cf2bbba08e5…

MALICIOUS

PDF

47.9 KB Created: 2021-05-13 00:33:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 50aa4160305255f795422f3584870d99 SHA-1: 0d049a867fc623b6f2b6b554bd869936ce550a3e SHA-256: 901c0cf2bbba08e55903d1022f16b062ef6db32a6843dde17eb4d7801de1b9fe
142 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 structured as SEO-optimized PDF links. The document body and heuristics indicate a lure for free game items like Robux and Coin Master spins, which is a common tactic for advance-fee scams. The presence of many external links suggests the document is designed to redirect users to potentially malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8715

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 https://netcdn.xyz/app/431946152/free-robux-offers-game-hack
    • http://licko.cz/files/free-spins-coin-master-links_GM406889139.pdf
    • http://licko.cz/files/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdf
    • http://licko.cz/files/master-coin-free-spin-daily_GM406889139.pdf
    • http://licko.cz/files/free-spins-on-coin-master-2021-ios_GM406889139.pdf
    • http://licko.cz/files/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdf
    • http://licko.cz/files/free-robux-no-downloading-apps_GM431946152.pdf
    • http://licko.cz/files/coin-master-daily-free-spins-and-coins_GM406889139.pdf
    • http://licko.cz/files/coin-master-free-coins-and-spins-link-2021_GM406889139.pdf
    • http://licko.cz/files/roblox-hacks-2021_GM431946152.pdf
    • http://licko.cz/files/coin-master-hack-mobile_GM406889139.pdf
    • http://licko.cz/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdf
    • http://licko.cz/files/avatar-roblox-game_GM431946152.pdf
    • http://licko.cz/files/coin-master-free-spins-youthnow_GM406889139.pdf
    • http://licko.cz/files/free-robux-no-human-verification-generator_GM431946152.pdf
    • http://licko.cz/files/coin-master-daily-free-spins-link-today-blog_GM406889139.pdf
    • http://licko.cz/files/coin-master-hack-here_GM406889139.pdf
    • http://licko.cz/files/free-robux-hacks-no-verification_GM431946152.pdf
    • http://licko.cz/files/bux-gg-robux-free_GM431946152.pdf
    • http://licko.cz/files/how-to-hack-a-minecraft-account_GM479516143.pdf
    • http://licko.cz/files/free-spins-coin-master-links-blogspot_GM406889139.pdf
    • https://www.communes.com
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047b5.bin
11be7aa7eb6a9f75ce22eb5e630f3ac75a27eb73439891800fe51784ccd25e93		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47B5 25912 bytes
font_01_sfnt_off000081f5.bin
eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81F5 2940 bytes
font_02_sfnt_off00008bff.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BFF 5696 bytes
font_03_sfnt_off00009910.bin
2fb616bca13af88ff89276a9b2d2fcc075dc4ebb9507e4cf45ab0719cef726f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9910 18012 bytes

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