Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae2736c3b48be02c…

MALICIOUS

PDF

45.5 KB Created: 2021-05-16 06:08:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ecee3cd44715be5fdc9b8897a4cda490 SHA-1: d4c23a294b441634ba1f1a651a46462e97a9df30 SHA-256: ae2736c3b48be02cf840e61ca2cfb373da7da626fa1844ff2229b02771a5140f
102 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 related to game hacks and cheats. The document body itself contains a primary URL pointing to a 'how-to-get-a-free-minecraft-server' page, suggesting a lure for users seeking unauthorized game advantages. The presence of a link farm and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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.xyz/app/479516143/how-to-get-a-free-minecraft-server-game-hack
    • https://www.hotschool.com.au/images/coin-master-hack-spins-apk_GM406889139.pdf
    • https://www.hotschool.com.au/images/codes-how-to-get-free-robux_GM431946152.pdf
    • https://www.hotschool.com.au/images/free-robux-no-human-verification_GM431946152.pdf
    • https://www.hotschool.com.au/images/free-card-link-coin-master_GM406889139.pdf
    • https://www.hotschool.com.au/images/free-robux-no-scam_GM431946152.pdf
    • https://www.hotschool.com.au/images/robuxy-com-generator_GM431946152.pdf
    • https://www.hotschool.com.au/images/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdf
    • https://www.hotschool.com.au/images/free-free-robux_GM431946152.pdf
    • https://www.hotschool.com.au/images/coin-master-free-spin-app-reviews_GM406889139.pdf
    • https://www.hotschool.com.au/images/rbxoffer-com-free-robux_GM431946152.pdf
    • https://www.hotschool.com.au/images/coin-master-time-speed-hack_GM406889139.pdf
    • https://www.hotschool.com.au/images/free-robux-glitch-2021_GM431946152.pdf
    • https://www.hotschool.com.au/images/coin-master-ios-hack-download_GM406889139.pdf
    • https://www.hotschool.com.au/images/robux-money_GM431946152.pdf
    • https://www.hotschool.com.au/images/roblox-promo-codes-free-robux_GM431946152.pdf
    • https://www.hotschool.com.au/images/minecraft-servers-that-allow-hacks_GM479516143.pdf
    • https://www.hotschool.com.au/images/to-get-free-robux_GM431946152.pdf
    • https://www.hotschool.com.au/images/master-coin-free-spin-daily_GM406889139.pdf
    • https://www.hotschool.com.au/images/how-to-give-robux-on-mobile_GM431946152.pdf
    • https://www.hotschool.com.au/images/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b84.bin
a9f514723d9e963239331f32826e86e760849a4daec0cd389a033df2ae2f8c66
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B84 25544 bytes
font_01_sfnt_off00008568.bin
3811f2fb1880daf4953efcc9c7427d9b438bced237490b00be4a6ec3ecea79e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x8568 3092 bytes
font_02_sfnt_off00009013.bin
888c9dccd83fb0c13f9447925305c3d56d9429efcbe621f5ab8e9b5d24de1b14
pdf-font-stream PDF embedded font (sfnt) at offset 0x9013 17988 bytes