Malicious PDF — malware analysis report

Static analysis result for SHA-256 39aaee03257da2b0…

MALICIOUS

PDF

35.1 KB Created: 2021-07-07 04:34:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: dda59f42f509fcf990b25b86aae09457 SHA-1: f76c1622cf5f1f82fc27f2eaef48872498e1ed2f SHA-256: 39aaee03257da2b07b1f3c51da0055d41a701b759c15b3816ae7691d9b79c6da
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which point to other PDF files hosted on the same domain, suggesting a link farm or a method to distribute further malicious content. The document body and extracted URLs indicate a lure related to game hacks (Roblox, Coin Master), likely to trick users into downloading or visiting malicious sites. 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.tw/app/431946152/how-to-hack-someone-on-roblox-game-hack
    • https://traveljogja.net/ckfinder/userfiles/files/assassin-roblox-hack-2021_GM431946152.pdf
    • https://traveljogja.net/ckfinder/userfiles/files/coin-master-hack-tool-v1-9-pc_GM406889139.pdf
    • https://traveljogja.net/ckfinder/userfiles/files/how-to-get-free-robux-3-easy-steps_GM431946152.pdf
    • https://traveljogja.net/ckfinder/userfiles/files/free-printable-minecraft-coloring-pages_GM479516143.pdf
    • https://traveljogja.net/ckfinder/userfiles/files/how-to-get-minecraft-for-free-ios_GM479516143.pdf
    • https://traveljogja.net/ckfinder/userfiles/files/redeem-roblox-card-free_GM431946152.pdf
    • https://traveljogja.net/ckfinder/userfiles/files/coin-master-apk-mod-free-download_GM406889139.pdf
    • https://traveljogja.net/ckfinder/userfiles/files/buy-robux-free_GM431946152.pdf
    • https://traveljogja.net/ckfinder/userfiles/files/is-roblox-free-on-computer_GM431946152.pdf
    • https://traveljogja.net/ckfinder/userfiles/files/how-to-hack-roblox-assassin-2021_GM431946152.pdf
    • https://traveljogja.net/ckfinder/userfiles/files/roblox-jailbreak-hack-july-2021_GM431946152.pdf
    • https://traveljogja.net/ckfinder/userfiles/files/hacks-to-get-free-robux_GM431946152.pdf
    • https://traveljogja.net/ckfinder/userfiles/files/roblox-play-as-guest-free_GM431946152.pdf
    • https://traveljogja.net/ckfinder/userfiles/files/free-credit-on-roblox-twisted-murderer_GM431946152.pdf
    • https://traveljogja.net/ckfinder/userfiles/files/free-roblox-promo-codes-no-human-verifycation_GM431946152.pdf
    • https://traveljogja.net/ckfinder/userfiles/files/moonactive-coin-master-free-spins-link_GM406889139.pdf
    • https://traveljogja.net/ckfinder/userfiles/files/paginas-de-hack-para-roblox_GM431946152.pdf
    • https://traveljogja.net/ckfinder/userfiles/files/coin-master-free-spins-and-coins-2021_GM406889139.pdf
    • https://traveljogja.net/ckfinder/userfiles/files/minecraft-pe-hacks_GM479516143.pdf
    • https://traveljogja.net/ckfinder/userfiles/files/how-do-you-free-robux-on-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003049.bin
de726f29260ace81fd662d05c7fafbd07f6040f89323a9df3310c8a25547dc67
pdf-font-stream PDF embedded font (sfnt) at offset 0x3049 22948 bytes
font_01_sfnt_off000063f9.bin
963276ac3658a4f1303280410bd3aafd1a833c38ea79ed0af769875644ea58f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x63F9 19080 bytes