Malicious PDF — malware analysis report

Static analysis result for SHA-256 e383cab4c27aac02…

MALICIOUS

PDF

43.1 KB Created: 2021-05-15 15:07:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a2c065844f36b4aea087ba749dbfdeae SHA-1: a0975bbb04c667010a1604cf29e4ece1112803ee SHA-256: e383cab4c27aac0283084bfaacdcb2652f780d185e10138bb1333ee49f21f531
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various game-related hack sites. The document body also contains a direct link to a Roblox credit hack, suggesting a lure for users seeking in-game advantages. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent behind the link farm and lures.

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/431946152/how-to-get-roblox-credit-for-free-game-hack
    • https://www.ucc-today.com/uploads/files/files/coin-master-hack-without-verification_GM406889139.pdf
    • https://www.ucc-today.com/uploads/files/files/coin-master-2021-free-spins-link_GM406889139.pdf
    • https://www.ucc-today.com/uploads/files/files/free-roblox-accounts-with-builders-club_GM431946152.pdf
    • https://www.ucc-today.com/uploads/files/files/hack-coin-master-android-game_GM406889139.pdf
    • https://www.ucc-today.com/uploads/files/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdf
    • https://www.ucc-today.com/uploads/files/files/mcpe-116_GM479516143.pdf
    • https://www.ucc-today.com/uploads/files/files/coin-master-free-spins-without-human-verification_GM406889139.pdf
    • https://www.ucc-today.com/uploads/files/files/roblox-arsenal-hack-script-pastebin_GM431946152.pdf
    • https://www.ucc-today.com/uploads/files/files/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdf
    • https://www.ucc-today.com/uploads/files/files/free-robux-meme_GM431946152.pdf
    • https://www.ucc-today.com/uploads/files/files/free-spins-coin-master-links_GM406889139.pdf
    • https://www.ucc-today.com/uploads/files/files/how-to-get-free-robux-on-roblox_GM431946152.pdf
    • https://www.ucc-today.com/uploads/files/files/how-do-you-hack-for-2021000-coins-on-flip-master_GM406889139.pdf
    • https://www.ucc-today.com/uploads/files/files/coin-master-hack-mod-apk_GM406889139.pdf
    • https://www.ucc-today.com/uploads/files/files/get-free-spins-coin-master-link_GM406889139.pdf
    • https://www.ucc-today.com/uploads/files/files/minecraft-hacks_GM479516143.pdf
    • https://www.ucc-today.com/uploads/files/files/how-to-hack-to-get-robux_GM431946152.pdf
    • https://www.ucc-today.com/uploads/files/files/how-to-get-free-robux-for-real_GM431946152.pdf
    • https://www.ucc-today.com/uploads/files/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
    • https://www.ucc-today.com/uploads/files/files/coin-master-free-attack-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a05.bin
5a374afc8550024912f88126b59af4ee186411107809c05db57aa6790c01d051
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A05 26584 bytes
font_01_sfnt_off00008534.bin
aaee93be15afea3f34265028f72e14c8d8177a28a7e511fa9958eeec3e94f784
pdf-font-stream PDF embedded font (sfnt) at offset 0x8534 18508 bytes