Malicious PDF — malware analysis report

Static analysis result for SHA-256 3319d92986b2d810…

MALICIOUS

PDF

35.0 KB Created: 2021-06-17 17:01:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: d14eca19ed610159e264cbbd12b05f83 SHA-1: 6d26853cf6168a209d00169557f3945bac1be6d7 SHA-256: 3319d92986b2d81058410f37c5b183e854aea44b23c858ea5c79dddc5b580e31
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'free game hacks' to entice users. It contains multiple links, including a critical one pointing to a known malicious redirector infrastructure at http://netcdn.co/app/431946152/50-free-robux-game-hack. The document's structure and embedded links suggest it is designed to lead the user to download or interact with malicious content, likely through a chain of redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/431946152/50-free-robux-game-hack In PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-roblox-pin-codes_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/cheaterteam-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-noclip-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/village-4-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/cheat-roblox-lumber-tyccon-fly_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/cute-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/is-the-roblox-cheat-detection-good_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-free-spins-daily-link-updated_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-free-skin_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-redeem-a-free-code-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/hack-scripting-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off000032dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32DD 22280 bytes
SHA-256: d615e03f7f9be4bce9133dcb84f93050e08b59ce234cb7fa1d8f4e8411106142
font_01_sfnt_off00006443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6443 18836 bytes
SHA-256: ec9b76ec47f22b419d4df5c67492578b9c4e2dd12cad7117e5aad5d8169963af