Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c5f77a44f2a671a…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 19:03:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: ca28412c716db70006e2ba31a2f555ee SHA-1: 07ca428e07ef0ea8e5e667c01a3bdbbeb6bd6ec3 SHA-256: 8c5f77a44f2a671aa0e0e8e5a23f3638dd51cb3a3308cba820cb5025e375fa6c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free Robux and game hacks to entice users to click on embedded links. The primary link, http://netcdn.tw/app/431946152/get-me-robux-for-free-game-hack, is identified as a malicious redirector. The document's structure and embedded links suggest an attempt to drive users to potentially malicious websites, likely for credential harvesting or malware distribution.

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.tw/app/431946152/get-me-robux-for-free-game-hack In PDF document text
    • http://perpus.stikesphi.ac.id/repository/is-hacking-a-roblox-game-illegal_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/ways-to-earn-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/roblox-limiteds-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/roblox-cheats-for-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/tiktok-free-followers-2021_GM835599320.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/good-roblox-hacks-that-can-effect-other-players_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/play-free-roblox-war-games_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/roblox-swat-shirt-free_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/how-to-play-roblox-on-itunes-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/how-to-play-roblox-rfor-free-no-acount_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-robux-hack-forum-by-envix_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/ex7-roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/win-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/compte-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/how-to-get-free-robux-easy-way-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/minecraft-free-install_GM479516143.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/how-to-hack-into-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/restaurant-tycoon-2-for-free-today-roblox_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_off0000304c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x304C 22412 bytes
SHA-256: 3c175101b173752d816f17d3bd30a38abac92336d0b617b7d3728f4b7aa121f6
font_01_sfnt_off0000622e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x622E 19016 bytes
SHA-256: feaab394b075859e694c399921b9b5bf0523619dd427b317c2360992586738dc

Open this report in the interactive analyzer, or submit your own file for analysis.