Malicious PDF — malware analysis report

Static analysis result for SHA-256 277e5bbebba63bc9…

MALICIOUS

PDF

40.6 KB Created: 2021-05-15 15:29:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 175e08e41e8eedeae50837e899e54dce SHA-1: 3d2f7af8c21b21dfa218551abe6c0f9e152231e3 SHA-256: 277e5bbebba63bc9ad3991ed92d5d335fb6abd940f9d6d3e8fa9998e70c9a28e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs that form a link farm, predominantly related to game hacks and free currency. The ML classifier and PDF heuristics strongly indicate malicious intent, likely to direct users to scam or malware distribution sites. The document body and embedded links suggest a lure for game-related exploits.

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/406889139/free-coins-coin-master-link-today-game-hack
    • http://maslabaou.com/images/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdf
    • http://maslabaou.com/images/roblox-troll-outfits-free_GM431946152.pdf
    • http://maslabaou.com/images/roblox-hack-client_GM431946152.pdf
    • http://maslabaou.com/images/coin-master-pc-hack-tool_GM406889139.pdf
    • http://maslabaou.com/images/how-to-hack-people-in-roblox_GM431946152.pdf
    • http://maslabaou.com/images/how-to-get-roblox-credit-for-free_GM431946152.pdf
    • http://maslabaou.com/images/how-to-hack-someone-on-roblox_GM431946152.pdf
    • http://maslabaou.com/images/coin-master-facebook-free-spins_GM406889139.pdf
    • http://maslabaou.com/images/coin-master-email-rewards_GM406889139.pdf
    • http://maslabaou.com/images/how-to-buy-robux-for-free_GM431946152.pdf
    • http://maslabaou.com/images/i-got-hacked-on-roblox_GM431946152.pdf
    • http://maslabaou.com/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • http://maslabaou.com/images/claim-free-robux_GM431946152.pdf
    • http://maslabaou.com/images/free-appsfor-coin-master-daily-rewards_GM406889139.pdf
    • http://maslabaou.com/images/microsoft-roblox_GM431946152.pdf
    • http://maslabaou.com/images/coin-master-free-spin-and-coin-links_GM406889139.pdf
    • http://maslabaou.com/images/coin-master-free-cards-2021_GM406889139.pdf
    • http://maslabaou.com/images/roblox-admin-hack_GM431946152.pdf
    • http://maslabaou.com/images/free-spins-coin-master-links-blogspot_GM406889139.pdf
    • http://maslabaou.com/images/minecraft-hacks_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000465b.bin
28577ef3456fcbe43644764fbb34b6ef9498626c60170404a271224b3859b24b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x465B 23732 bytes
font_01_sfnt_off00007c1c.bin
919e3931629c19f2cd0ae6f6c09285b8d44d14b54c37a6bb98ea3e4a7cef2171		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C1C 18232 bytes

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