Malicious PDF — malware analysis report

Static analysis result for SHA-256 61c326ffdfc1bcea…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 22:29:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 20710af46b6b5090ac979fa1f86d32c3 SHA-1: 6cb4080f9df2e49059695a6ba1f265ca98b50c12 SHA-256: 61c326ffdfc1bceadef80f0f58949c4aab03402f23152ddae33cc9cea42d398a
102 Risk Score

Malware Insights

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

The PDF contains numerous links to external sites, many of which are hosted on domains associated with malicious content, such as game hacks and exploit downloads. The ML classifier strongly indicated maliciousness, and the presence of a download button lure further supports a malicious intent. The document's purpose appears to be to trick users into downloading further malware or engaging in fraudulent activities.

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.tw/app/431946152/woman-roblox-game-hack
    • https://www.sonestad.se/library/repository/wurst-client-download_GM479516143.pdf
    • https://www.sonestad.se/library/repository/free-minecraft-windows-10-with-java_GM479516143.pdf
    • https://www.sonestad.se/library/repository/get-robux-for-free-2021_GM431946152.pdf
    • https://www.sonestad.se/library/repository/how-you-get-free-robux_GM431946152.pdf
    • https://www.sonestad.se/library/repository/como-hackear-coin-master-espaol_GM406889139.pdf
    • https://www.sonestad.se/library/repository/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdf
    • https://www.sonestad.se/library/repository/how-to-get-free-robux-no-hack-or-download_GM431946152.pdf
    • https://www.sonestad.se/library/repository/coin-master-hacks-to-get-spins_GM406889139.pdf
    • https://www.sonestad.se/library/repository/coin-master-free-spin-and-trading_GM406889139.pdf
    • https://www.sonestad.se/library/repository/free-spin-generator-for-coin-master_GM406889139.pdf
    • https://www.sonestad.se/library/repository/roblox-how-to-reclaim-hacked-accounts_GM431946152.pdf
    • https://www.sonestad.se/library/repository/free-coin-master-spins-no-verification_GM406889139.pdf
    • https://www.sonestad.se/library/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdf
    • https://www.sonestad.se/library/repository/free-roblox-codes_GM431946152.pdf
    • https://www.sonestad.se/library/repository/free-robux-real-2021_GM431946152.pdf
    • https://www.sonestad.se/library/repository/free-minecraft-java-account_GM479516143.pdf
    • https://www.sonestad.se/library/repository/games-like-minecraft-but-free_GM479516143.pdf
    • https://www.sonestad.se/library/repository/picture-roblox_GM431946152.pdf
    • https://www.sonestad.se/library/repository/free-roblox-premium_GM431946152.pdf
    • https://www.sonestad.se/library/repository/master-free-spin-and-coin-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ffa.bin
3787382fd0d8b2e183aef3c0f4ac0eec3e3446ef4dc095d73a8a68be45443dc5
pdf-font-stream PDF embedded font (sfnt) at offset 0x2FFA 22364 bytes
font_01_sfnt_off000061f6.bin
99893507a42f3e58ba14e855442a75d2460821b48007dc0e8edfe894ba93b9d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x61F6 18944 bytes