Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9baa1eae6236ac6…

MALICIOUS

PDF

33.5 KB Created: 2021-06-25 20:09:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c0eaa9273ff96c0f4329245108ce6ab5 SHA-1: 273384ea4f35305a881dea9e4f6eb9537c4fa802 SHA-256: a9baa1eae6236ac624ce805621cb26407fca2111a2295c3e85ff8036d4030872
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF links, suggesting a link farm. The document body and embedded URLs explicitly mention game hacks and cheats for popular games like Roblox and Minecraft. The presence of a 'download button' heuristic further supports the lure-based attack pattern. The ML classifier strongly flagged this PDF as malicious.

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/hack-roblox-dragon-ball-online-game-hack
    • https://www.deg91.com/upload/files/faztokens-hack-the-pizzaria-roleplay-remastered-roblox_GM431946152.pdf
    • https://www.deg91.com/upload/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdf
    • https://www.deg91.com/upload/files/hacked-roblox-accounts-list_GM431946152.pdf
    • https://www.deg91.com/upload/files/free-robux-games-that-actually-work_GM431946152.pdf
    • https://www.deg91.com/upload/files/minecraft-free-reddit_GM479516143.pdf
    • https://www.deg91.com/upload/files/get-free-robux-no-verification_GM431946152.pdf
    • https://www.deg91.com/upload/files/how-to-get-minecraft-for-free-ios_GM479516143.pdf
    • https://www.deg91.com/upload/files/free-robux-no-verification-at-all_GM431946152.pdf
    • https://www.deg91.com/upload/files/free-robux-hacks-no-verification_GM431946152.pdf
    • https://www.deg91.com/upload/files/free-tiktok-followers-real_GM835599320.pdf
    • https://www.deg91.com/upload/files/all-mobile-roblox-hacks_GM431946152.pdf
    • https://www.deg91.com/upload/files/coin-master-free-raid-link_GM406889139.pdf
    • https://www.deg91.com/upload/files/coin-master-free-spins-link-2021_GM406889139.pdf
    • https://www.deg91.com/upload/files/free-robux-obbys-may-2021_GM431946152.pdf
    • https://www.deg91.com/upload/files/roblox-free-catalog-items-pastebin_GM431946152.pdf
    • https://www.deg91.com/upload/files/free-minecraft-bedrock-server_GM479516143.pdf
    • https://www.deg91.com/upload/files/how-to-hack-coin-master-without-root_GM406889139.pdf
    • https://www.deg91.com/upload/files/coin-master-hack-pc-free_GM406889139.pdf
    • https://www.deg91.com/upload/files/roblox-hack-unlimited-robux-free-download_GM431946152.pdf
    • https://www.deg91.com/upload/files/free-clothes-roblox-codes_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002d7f.bin
d25b90d3fef36428784e9a98d64f197bb037430ba07990507ad9209ed600555f
pdf-font-stream PDF embedded font (sfnt) at offset 0x2D7F 22068 bytes
font_01_sfnt_off00005e33.bin
9a270b6b0f88e026aa2086ae9fc660d507e346cbba320137adc7f92ba3677c6d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E33 18944 bytes