Malicious PDF — malware analysis report

Static analysis result for SHA-256 485a982f5e8480d5…

MALICIOUS

PDF

48.1 KB Created: 2021-06-10 14:46:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 29a0ed0fa954f131d2625f35acd4322b SHA-1: 5dc8c866e23a99055580f47aabb9e70a57bbc1ec SHA-256: 485a982f5e8480d51611ac005c53600c6141956c227f672331874a7dceaa4d2d
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of embedded links pointing to an IP address, suggesting a link farm designed to distribute malicious content. The document body, though heavily obfuscated, contains references to game downloads and hacks, aligning with a lure to trick users into clicking these links. The presence of external URIs and a link farm heuristic strongly indicates an attempt to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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/roblox-install-free-game-game-hack
    • http://111.68.26.74/widyapustaka/repository/try-minecraft-free_GM479516143.pdf
    • http://111.68.26.74/widyapustaka/repository/tiktok-free-watermark_GM835599320.pdf
    • http://111.68.26.74/widyapustaka/repository/coin-master-hack-8-ball-pool_GM406889139.pdf
    • http://111.68.26.74/widyapustaka/repository/will-minecraft-dungeons-be-free_GM479516143.pdf
    • http://111.68.26.74/widyapustaka/repository/how-to-get-minecraft-for-free-ios_GM479516143.pdf
    • http://111.68.26.74/widyapustaka/repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdf
    • http://111.68.26.74/widyapustaka/repository/coin-master-hack-spins-download_GM406889139.pdf
    • http://111.68.26.74/widyapustaka/repository/coin-master-daily-free-spins-2021_GM406889139.pdf
    • http://111.68.26.74/widyapustaka/repository/google-moon-active_GM406889139.pdf
    • http://111.68.26.74/widyapustaka/repository/10-games-that-give-you-free-robux_GM431946152.pdf
    • http://111.68.26.74/widyapustaka/repository/universal-minecraft-converter-free_GM479516143.pdf
    • http://111.68.26.74/widyapustaka/repository/how-to-get-roblox-premium-for-free-2021_GM431946152.pdf
    • http://111.68.26.74/widyapustaka/repository/coin-master-hack-online-android_GM406889139.pdf
    • http://111.68.26.74/widyapustaka/repository/coin-master-hack-app-download-free_GM406889139.pdf
    • http://111.68.26.74/widyapustaka/repository/free-minecraft-coins_GM479516143.pdf
    • http://111.68.26.74/widyapustaka/repository/free-minecraft-maps-pe_GM479516143.pdf
    • http://111.68.26.74/widyapustaka/repository/roblox-guess-the-character-cheats_GM431946152.pdf
    • http://111.68.26.74/widyapustaka/repository/coin-master-free-spin-today-2021_GM406889139.pdf
    • http://111.68.26.74/widyapustaka/repository/i-hacked-the-roblox-app_GM431946152.pdf
    • http://111.68.26.74/widyapustaka/repository/coin-master-hacks-for-pet-food_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000559d.bin
2f846012eb4efee09312bea963a119c1065c7bca7a13d3c957cb19c82fdfa5d2
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x559D 28588 bytes
font_01_sfnt_off000098cf.bin
04cca8223b891902dc58514959e3d0b87ddb72ff49d8b6248e7ee44ad7a97bdf
pdf-font-stream PDF embedded font (sfnt) at offset 0x98CF 18540 bytes