Malicious PDF — malware analysis report

Static analysis result for SHA-256 90855ba12963341a…

MALICIOUS

PDF

34.2 KB Created: 2021-07-09 19:41:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f5b6ae0fed71a36e0c2fc1a34187ebdc SHA-1: 929e34f8220df454092b8909f08687f0f8922978 SHA-256: 90855ba12963341a5080ddb3628c43bcbc394b1cb77832ad1c0452ddf7097548
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that promotes free game hacks and currency for popular games like Roblox and Coin Master. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract users with deceptive content. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring users to click these links, which likely lead to malicious websites or further malware downloads.

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/835599320/is-tiktok-free-game-hack
    • http://www.businessloanspecialist.com/uploaded_files/userfiles/files/robloxs-hack-site_GM431946152.pdf
    • http://www.businessloanspecialist.com/uploaded_files/userfiles/files/steam-free-robux-live-now_GM431946152.pdf
    • http://www.businessloanspecialist.com/uploaded_files/userfiles/files/get-robux-free-and-legit_GM431946152.pdf
    • http://www.businessloanspecialist.com/uploaded_files/userfiles/files/how-to-get-minecraft-for-free_GM479516143.pdf
    • http://www.businessloanspecialist.com/uploaded_files/userfiles/files/minecraft-free-play-no-download_GM479516143.pdf
    • http://www.businessloanspecialist.com/uploaded_files/userfiles/files/free-coins-on-coin-master-2021_GM406889139.pdf
    • http://www.businessloanspecialist.com/uploaded_files/userfiles/files/safe-free-roblox-exploits_GM431946152.pdf
    • http://www.businessloanspecialist.com/uploaded_files/userfiles/files/free-robux-obby-with-out-liking-it_GM431946152.pdf
    • http://www.businessloanspecialist.com/uploaded_files/userfiles/files/coin-master-spin-hack_GM406889139.pdf
    • http://www.businessloanspecialist.com/uploaded_files/userfiles/files/freegames911com-coinmastertipsandcheats2021freecoinsandspins_GM406889139.pdf
    • http://www.businessloanspecialist.com/uploaded_files/userfiles/files/este-este-unico-hack-que-te-da-robux_GM431946152.pdf
    • http://www.businessloanspecialist.com/uploaded_files/userfiles/files/robux-hack-free-robux_GM431946152.pdf
    • http://www.businessloanspecialist.com/uploaded_files/userfiles/files/coin-master-hack-2021-ios-download_GM406889139.pdf
    • http://www.businessloanspecialist.com/uploaded_files/userfiles/files/free-promo-codes-for-robux_GM431946152.pdf
    • http://www.businessloanspecialist.com/uploaded_files/userfiles/files/how-to-get-free-tiktok-fans-without-human-verification_GM835599320.pdf
    • http://www.businessloanspecialist.com/uploaded_files/userfiles/files/how-do-you-get-free-robux-easy-way_GM431946152.pdf
    • http://www.businessloanspecialist.com/uploaded_files/userfiles/files/tiktok-free-download-for-windows-10_GM835599320.pdf
    • http://www.businessloanspecialist.com/uploaded_files/userfiles/files/february-2021-robux-cheats_GM431946152.pdf
    • http://www.businessloanspecialist.com/uploaded_files/userfiles/files/roblox-hack-bypass-2021_GM431946152.pdf
    • http://www.businessloanspecialist.com/uploaded_files/userfiles/files/free-robux-yeyeyeyyeye_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000311b.bin
b012a6dce87cdd3897990e09fc024b6226a22b4752d39aacb2e189edaee73ce2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x311B 22772 bytes
font_01_sfnt_off000063fa.bin
1ad9b968f8d868dc9306eb656e42f80411177ac895833eed5c4e9bc3c7375aa9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63FA 17972 bytes

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