Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1c9606149375b18…

MALICIOUS

PDF

42.8 KB Created: 2021-05-16 06:24:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e8634be8126fc05e612fe5a99c24c63e SHA-1: 4c1167a1859a6bcba499e4e28a426d9e29ee2b98 SHA-256: d1c9606149375b18d77470beb58efe2ad64d9411248b4b3e9e033cf0a8d50bcb
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are hosted on 'safetin.ru' and appear to be related to game hacks and cheats. The presence of a large number of these links, coupled with the ML classifier flagging the PDF as malicious, strongly suggests an attempt to direct users to potentially harmful content or downloads. The document body, though heavily obfuscated, contains references to 'robux' and game-related terms, reinforcing the lure.

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/431946152/robux-game-hack
    • http://safetin.ru/images/coin-master-hack-spins-download_GM406889139.pdf
    • http://safetin.ru/images/coin-master-hack-spin-160-pro_GM406889139.pdf
    • http://safetin.ru/images/coin-master-hack-mod-apk-free-download_GM406889139.pdf
    • http://safetin.ru/images/how-to-hack-someone-on-roblox_GM431946152.pdf
    • http://safetin.ru/images/free-robux-generator-for-kids_GM431946152.pdf
    • http://safetin.ru/images/coin-master-get-free-cards_GM406889139.pdf
    • http://safetin.ru/images/coin-master-rewards-app_GM406889139.pdf
    • http://safetin.ru/images/hack-to-send-gold-cards-on-coin-master_GM406889139.pdf
    • http://safetin.ru/images/how-to-get-hacks-on-minecraft_GM479516143.pdf
    • http://safetin.ru/images/how-to-get-free-robux-fast-and-easy_GM431946152.pdf
    • http://safetin.ru/images/doctor-louie-roblox_GM431946152.pdf
    • http://safetin.ru/images/robux-hack-2021_GM431946152.pdf
    • http://safetin.ru/images/minecraft-free-download-windows-10_GM479516143.pdf
    • http://safetin.ru/images/free-minecraft-account-reddit_GM479516143.pdf
    • http://safetin.ru/images/www-roblox-com-free-robux_GM431946152.pdf
    • http://safetin.ru/images/free-100-robux_GM431946152.pdf
    • http://safetin.ru/images/minecraft-reach-hack_GM479516143.pdf
    • http://safetin.ru/images/how-to-get-minecraft-for-free-on-nintendo-switch_GM479516143.pdf
    • http://safetin.ru/images/apps-to-get-free-robux_GM431946152.pdf
    • http://safetin.ru/images/coin-hackhub-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000487b.bin
94b0033e59d42236d0e13dd2b7d9c937d1c4c7737d129e3649da85f454b466f3
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x487B 27360 bytes
font_01_sfnt_off00008624.bin
ccf20ca1ad80d0cd2f0d464461636129858ae353cf2c3769b35ef20048afdef0
pdf-font-stream PDF embedded font (sfnt) at offset 0x8624 17852 bytes