Malicious PDF — malware analysis report

Static analysis result for SHA-256 d98bcd0660a7a008…

MALICIOUS

PDF

44.9 KB Created: 2021-06-11 12:12:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 628ace452a170e88fe2b404ccbdf9cea SHA-1: 76960a7bca1d4c95fd98bb966ef2275669631d23 SHA-256: d98bcd0660a7a008a5133429c20c61fd3f223f87ff1d9cb528434b3c162b6f4c
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many pointing to IP addresses, which is indicative of a link farm designed to host malicious content. The document body and extracted URLs suggest a lure related to 'Roblox' game items, likely a scam to trick users into downloading further malware. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.tw/app/431946152/free-girl-skins-for-roblox-game-hack
    • http://111.68.26.74/widyapustaka/repository/robux-hack-no-human-verification-2021_GM431946152.pdf
    • http://111.68.26.74/widyapustaka/repository/free-admin-in-any-roblox-game_GM431946152.pdf
    • http://111.68.26.74/widyapustaka/repository/how-to-hack-a-roblox-account-2021_GM431946152.pdf
    • http://111.68.26.74/widyapustaka/repository/free-robux-games-on-roblox_GM431946152.pdf
    • http://111.68.26.74/widyapustaka/repository/free-roblox-promo-codes-for-robux_GM431946152.pdf
    • http://111.68.26.74/widyapustaka/repository/how-to-cheat-to-get-robux-on-roblox_GM431946152.pdf
    • http://111.68.26.74/widyapustaka/repository/cute-free-hair-on-roblox_GM431946152.pdf
    • http://111.68.26.74/widyapustaka/repository/rbxoffer-com-free-robux_GM431946152.pdf
    • http://111.68.26.74/widyapustaka/repository/how-to-get-more-robux_GM431946152.pdf
    • http://111.68.26.74/widyapustaka/repository/roblox-hack-scripts-pastebin_GM431946152.pdf
    • http://111.68.26.74/widyapustaka/repository/minecraft-pe-free-download_GM479516143.pdf
    • http://111.68.26.74/widyapustaka/repository/best-free-minecraft-skins_GM479516143.pdf
    • http://111.68.26.74/widyapustaka/repository/free-robux-no-survey-2021-android_GM431946152.pdf
    • http://111.68.26.74/widyapustaka/repository/free-robux-generator-codes_GM431946152.pdf
    • http://111.68.26.74/widyapustaka/repository/how-do-you-get-free-robux-without-paying_GM431946152.pdf
    • http://111.68.26.74/widyapustaka/repository/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdf
    • http://111.68.26.74/widyapustaka/repository/free-account-roblox-with-robux_GM431946152.pdf
    • http://111.68.26.74/widyapustaka/repository/i-need-more-free-spins-on-coin-master_GM406889139.pdf
    • http://111.68.26.74/widyapustaka/repository/blogger-coin-master-free-spins_GM406889139.pdf
    • http://111.68.26.74/widyapustaka/repository/coin-master-free-cards-link-2021-today_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005155.bin
d6482ff195066ba7608bd82940c9c3dbbaf246d1155ed081c6d67c33944c5890
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5155 27228 bytes
font_01_sfnt_off00008d16.bin
060bc0022e92a892f422a8b4a740d81204cce39614b5198d35816047b2903ac9
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D16 18236 bytes