Malicious PDF — malware analysis report

Static analysis result for SHA-256 363fc9aa50557a8b…

MALICIOUS

PDF

34.2 KB Created: 2021-06-20 06:19:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b450eb04ce8aabec3ed10c6fac805e1f SHA-1: 6851a40d9618056f469811aa1221b8c8913770bd SHA-256: 363fc9aa50557a8b56b8aa5b543644aa879d6968b4ba6209a4606ff6c91c7ad4
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded URLs, many of which are structured as a link farm for SEO purposes, pointing to pages offering game hacks and cheats. The document body explicitly mentions 'Get Free Bc Tbc Obc Roblox' and includes a URL that appears to be a download link. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect users to malicious sites, likely for malware distribution or phishing. The ML classifier also strongly indicated maliciousness.

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/get-free-bc-tbc-obc-roblox-game-hack PDF link annotation
    • http://lib.stimykpn.ac.id/repository/how-to-hack-arsenal-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/dragon-ball-z-rage-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-spin-and-coins-fbid-links_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-spins-on-coin-master-android_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-hack-mcpe-master-coins_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-one-piece-final-chapter-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-obc-lifetime-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/what-do-you-do-when-your-roblox-account-is-hacked_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/hacks-para-boku-no-roblox-remastered_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-hack-dot-xyz_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-money-glitch-on-roblox-on-car-simulator_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-demon_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-robux-no-tradeing-no-geting-band_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-app_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/robux-javascript-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E81 22696 bytes
SHA-256: 16670007aba0431ea1f0892e036c06481c5b284cb04578096f7b5b4922fb0b6e
font_01_sfnt_off0000618f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x618F 18752 bytes
SHA-256: 2126e5d294356451037e6ccca2c83b27194f491c31df877bd5eecaa9c88d4ac8

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