Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb44c60055e161f5…

MALICIOUS

PDF

33.5 KB Created: 2021-06-19 03:21:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b030c752d5853b67afc39b2c474d625b SHA-1: 02aa4b4f80d67cdaa0a936223972ab839fc1fb19 SHA-256: eb44c60055e161f5898c7ceee397941cb30d4ce911d464128296b8956acfb236
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document is designed as a lure, presenting itself as a "Cookie Hack Roblox" or similar game cheat to entice users. It contains a large number of SEO-optimized links pointing to other PDF files hosted on external domains, likely serving as a link farm or a distribution mechanism for further malicious content. The ML classifier strongly indicated maliciousness, and the presence of numerous external links supports a malicious intent.

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.co/app/431946152/cookie-hack-roblox-game-hack
    • http://huananhai.net/images/roblox-free-robux-enter-password_GM431946152.pdf
    • http://huananhai.net/images/hack-roblox-retail-tycoon_GM431946152.pdf
    • http://huananhai.net/images/roblox-speed-hacks-free_GM431946152.pdf
    • http://huananhai.net/images/coin-master-hack-apk-with-fb-login-2021_GM406889139.pdf
    • http://huananhai.net/images/how-to-get-sypnase-for-free-roblox_GM431946152.pdf
    • http://huananhai.net/images/how-to-hack-roblox-player_GM431946152.pdf
    • http://huananhai.net/images/minecraft-on-computer-free_GM479516143.pdf
    • http://huananhai.net/images/free-robux-no-verification-2021-android_GM431946152.pdf
    • http://huananhai.net/images/how-to-hack-people-in-roblox_GM431946152.pdf
    • http://huananhai.net/images/coin-master-fun-free-spins_GM406889139.pdf
    • http://huananhai.net/images/how-to-hack-roblox-accounts-2021-mobile_GM431946152.pdf
    • http://huananhai.net/images/coin-master-unlimited-spin-link_GM406889139.pdf
    • http://huananhai.net/images/free-minecraft-hosting-24-7_GM479516143.pdf
    • http://huananhai.net/images/hacks-for-coin-master-game_GM406889139.pdf
    • http://huananhai.net/images/free-robux-games-that-actually-work-2021_GM431946152.pdf
    • http://huananhai.net/images/pubg-uc-daraz_GM1330123889.pdf
    • http://huananhai.net/images/minecraft-servers-that-allow-hacks_GM479516143.pdf
    • http://huananhai.net/images/how-to-hack-coin-master-computer_GM406889139.pdf
    • http://huananhai.net/images/coin-master-free-spin-daily-link_GM406889139.pdf
    • http://huananhai.net/images/free-robux-human-verification_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002d6a.bin
11f7c1159c61760e6c9fc5402bc810d4732de54a4c983648ac94508293a127a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x2D6A 22444 bytes
font_01_sfnt_off00005f18.bin
90af8b091c116428b491d7818234aa8a0de503b623ca416f0183332f3310d757
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F18 18592 bytes