Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b772e61f1c0c532…

MALICIOUS

PDF

41.3 KB Created: 2021-05-19 09:40:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 84cacd0d88753cb57e80c5e1d29da902 SHA-1: 012aebcc419dae82ee9a65b8ee55689c0c47fb72 SHA-256: 1b772e61f1c0c5324f5c37f986c3d1b74ffe885e1ba84b78880c235e448a4030
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which are SEO-optimized and point to sites offering free in-game currency or items. The primary URL, https://netcdn.xyz/app/1094591345/pokemon-go-free-yellow-egg-game-hack, suggests a lure for game-related cheats or hacks. The presence of a PDF link farm and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/1094591345/pokemon-go-free-yellow-egg-game-hack
    • http://mou16-murmansk.ru/images/coin-master-free-spins-coins_GM406889139.pdf
    • http://mou16-murmansk.ru/images/free-robux-games_GM431946152.pdf
    • http://mou16-murmansk.ru/images/coin-master-hack-2021-no-survey_GM406889139.pdf
    • http://mou16-murmansk.ru/images/free-robux-codes-generator_GM431946152.pdf
    • http://mou16-murmansk.ru/images/how-to-earn-robux-fast_GM431946152.pdf
    • http://mou16-murmansk.ru/images/how-to-get-free-robux-app_GM431946152.pdf
    • http://mou16-murmansk.ru/images/facebook-coin-master-free-spins-link_GM406889139.pdf
    • http://mou16-murmansk.ru/images/coin-master-free-spin-and-coins-links_GM406889139.pdf
    • http://mou16-murmansk.ru/images/minecraft-free-minecoins_GM479516143.pdf
    • http://mou16-murmansk.ru/images/free-coin-master-spins-and-coins-for-daily_GM406889139.pdf
    • http://mou16-murmansk.ru/images/minecraft-pocket-edition-hack_GM479516143.pdf
    • http://mou16-murmansk.ru/images/how-to-hack-someones-roblox-account-2021_GM431946152.pdf
    • http://mou16-murmansk.ru/images/coin-master-free-spins-facebook_GM406889139.pdf
    • http://mou16-murmansk.ru/images/free-minecraft-thumbnails_GM479516143.pdf
    • http://mou16-murmansk.ru/images/what-is-a-minecraft-client_GM479516143.pdf
    • http://mou16-murmansk.ru/images/coin-master-generator-hack_GM406889139.pdf
    • http://mou16-murmansk.ru/images/free-robux-kid-friendly-no-human-verification_GM431946152.pdf
    • http://mou16-murmansk.ru/images/coin-master-hack-spins-apk-download_GM406889139.pdf
    • http://mou16-murmansk.ru/images/easy-robux-today-com_GM431946152.pdf
    • http://mou16-murmansk.ru/images/coin-master-free-spins-hack-iphone_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004825.bin
79617fff84cfe53ad9a82daaf32441c93af89be4270846237f41b9c3ad33aaa1
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4825 23852 bytes
font_01_sfnt_off00007e47.bin
a31e10cbf7a411a8916c583d3cbd8e79cf6e9adc6654f0ca4d34a818fdeae5ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E47 18532 bytes