Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc647c0aa7740682…

MALICIOUS

PDF

35.0 KB Created: 2021-06-27 18:11:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f7c15904c915a3836ae0374bf6aed2a6 SHA-1: bef3e6ed9dfc0a9301d7fcd4ff28041678115ca7 SHA-256: dc647c0aa7740682c20f8128c7261d97e10812a10c33ac6d6e1223bfc5e6ef29
102 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, many of which are structured as a link farm pointing to other PDF files. The document body and extracted URLs suggest a lure for downloading game cheats and hacks, which is a common tactic for distributing malware. The ML classifier also strongly indicated maliciousness.

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/roblox-in-cheat-ingine-work-in-pizza-place-game-hack
    • http://akvamaster.com.ua/images/robux-sign_GM431946152.pdf
    • http://akvamaster.com.ua/images/free-robux-hack-generator-club-2021_GM431946152.pdf
    • http://akvamaster.com.ua/images/how-do-you-install-minecraft-for-free_GM479516143.pdf
    • http://akvamaster.com.ua/images/free-spins-and-coins-coin-master_GM406889139.pdf
    • http://akvamaster.com.ua/images/robux-free-com_GM431946152.pdf
    • http://akvamaster.com.ua/images/roblox-script-running-with-cheat-engine_GM431946152.pdf
    • http://akvamaster.com.ua/images/how-to-hack-robux-without-human-verification_GM431946152.pdf
    • http://akvamaster.com.ua/images/roblox-hack-with-cheat-manager_GM431946152.pdf
    • http://akvamaster.com.ua/images/shirts-on-roblox-for-free_GM431946152.pdf
    • http://akvamaster.com.ua/images/minecraft-free-app_GM479516143.pdf
    • http://akvamaster.com.ua/images/is-roblox-free-on-ps4_GM431946152.pdf
    • http://akvamaster.com.ua/images/minecraft-java-edition-code-free_GM479516143.pdf
    • http://akvamaster.com.ua/images/free-links-for-coin-master_GM406889139.pdf
    • http://akvamaster.com.ua/images/how-do-you-hack-a-roblox-server-on-mac_GM431946152.pdf
    • http://akvamaster.com.ua/images/giving-away-free-robux-cards_GM431946152.pdf
    • http://akvamaster.com.ua/images/coin-master-hack-without-verification-2021_GM406889139.pdf
    • http://akvamaster.com.ua/images/free-tiktok-likes-2021_GM835599320.pdf
    • http://akvamaster.com.ua/images/robux-giving-free-robux_GM431946152.pdf
    • http://akvamaster.com.ua/images/free-robux-generator-without-verification_GM431946152.pdf
    • http://akvamaster.com.ua/images/get-me-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000629a.bin
3b3f735ca3574149f252d09b09987ecbe81b6e31fdb0085ac457edc938909a92
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x629A 19480 bytes
font_00_sfnt_off000031db.bin
d0a3d49fdb3461734c269c50692afbd89280fdf6c2bd8fccd77ad996ea61abb4
pdf-font-stream PDF embedded font (sfnt) at offset 0x31DB 21968 bytes