Malicious PDF — malware analysis report

Static analysis result for SHA-256 f78192ec74f05e73…

MALICIOUS

PDF

33.7 KB Created: 2021-07-06 05:31:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e6d845cf318ea0f18fee9c5510e71b5a SHA-1: 6d69caf1ac66cc85bddd3cb2a5a97da4561d0635 SHA-256: f78192ec74f05e735e0bd8566bda4abd182a10bc437c8d5f340ee22b0cd05bd6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game currency and hacks to entice users. It contains multiple links, including a critical one to a known malicious redirector at http://netcdn.tw/app/431946152/claimrbx-free-robux-game-hack. The document's structure and embedded URLs suggest it is designed to lead 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/claimrbx-free-robux-game-hack In PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/cheat-lumber-tycoon-2-roblox_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/free-minecraft-education-edition_GM479516143.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/roblox-godmode-hack_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/free-5-richest-accounts-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/roblox-aimbot-hack-download_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/roblox-bux-free_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/roblox-weight-lifting-simulator-3-hack_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/how-to-get-admin-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/hack-roblox-red-boy_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/red-cropped-top-and-ripped-jeans-roblox-outfit-free_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/roblox-rewards_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/how-to-hack-coin-master-game-2021_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/toolbox-apk_GM479516143.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/roblox-free-items_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/can-xbox-players-hack-eachother-roblox_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/how-to-hack-an-acount-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/free-robux-codes-2021-april_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/free-roblox-studio-library_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002d7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D7C 22016 bytes
SHA-256: 9ab2d5f34c98036e595d0f7d79b477526f67e9c2a9f377f8b061c8b9936396e5
font_01_sfnt_off00005e7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7E 19168 bytes
SHA-256: 7bf764ce28968fdb785bb336023e4079e63a9f6de2364164f85b44d41da13fd4

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