Malicious PDF — malware analysis report

Static analysis result for SHA-256 97e03cc6d636d068…

MALICIOUS

PDF

35.0 KB Created: 2021-06-27 09:24:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: cfcabf6600db81e5b2afe9d818e2c210 SHA-1: a31e3fffa0bb1b222b136562eef60836fcb860c6 SHA-256: 97e03cc6d636d068990d87b4b5108a7d15f3b78184271737a7a5852d8b0dc7b5
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are structured as SEO link farms. The document body and extracted URLs suggest a lure for users seeking game hacks and cheats, specifically for Roblox and Coin Master. The presence of a ML classifier flagging this PDF as malicious, combined with the link farm heuristic, indicates a high likelihood of this document being used to distribute malware or lead users to phishing sites.

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-lua-script-for-one-peace-opn-seas-roblox-game-hack
    • http://wwic.wales/uploads/files/files/free-models-for-roblox_GM431946152.pdf
    • http://wwic.wales/uploads/files/files/how-to-get-free-robux-2021-new_GM431946152.pdf
    • http://wwic.wales/uploads/files/files/25-free-spins-coin-master_GM406889139.pdf
    • http://wwic.wales/uploads/files/files/how-to-get-free-robux-with-a-fake-card_GM431946152.pdf
    • http://wwic.wales/uploads/files/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdf
    • http://wwic.wales/uploads/files/files/coin-master-hack-pro_GM406889139.pdf
    • http://wwic.wales/uploads/files/files/coin-master-reward-link_GM406889139.pdf
    • http://wwic.wales/uploads/files/files/redeem-roblox-cards-free-codes-2021_GM431946152.pdf
    • http://wwic.wales/uploads/files/files/hackear-coin-master_GM406889139.pdf
    • http://wwic.wales/uploads/files/files/how-to-get-free-followers-and-likes-on-tiktok_GM835599320.pdf
    • http://wwic.wales/uploads/files/files/coin-master-daily-free-spins-link-today-facebook_GM406889139.pdf
    • http://wwic.wales/uploads/files/files/free-robux-that-actually-works-2021_GM431946152.pdf
    • http://wwic.wales/uploads/files/files/roblox-typing-cheat-to-get-money-on-blox-burg_GM431946152.pdf
    • http://wwic.wales/uploads/files/files/hack-roblox-lumber-tycoon-2-fly_GM431946152.pdf
    • http://wwic.wales/uploads/files/files/get-free-cards-in-coin-master_GM406889139.pdf
    • http://wwic.wales/uploads/files/files/how-to-hack-nuclear-tycoon-money-on-roblox_GM431946152.pdf
    • http://wwic.wales/uploads/files/files/coin-master-2021_GM406889139.pdf
    • http://wwic.wales/uploads/files/files/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdf
    • http://wwic.wales/uploads/files/files/is-it-possible-to-get-free-robux_GM431946152.pdf
    • http://wwic.wales/uploads/files/files/roblox-got-talent-piano-hack_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003064.bin
f621fc8e65109b00e42174d28d45a68ef7380e400f20a66829354507b2276aca
pdf-font-stream PDF embedded font (sfnt) at offset 0x3064 22576 bytes
font_01_sfnt_off00006273.bin
c96592a05f9d6ab50468f61de8ba3cc02d884af6e2066e61e951806e47c0407d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6273 19516 bytes