Malicious PDF — malware analysis report

Static analysis result for SHA-256 339fac94fb6e7cdd…

MALICIOUS

PDF

33.2 KB Created: 2021-06-29 19:59:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7d6b936ccf88d566834dcb3b2838cd20 SHA-1: d916e9799a8317138810f5b198f8b7d0edb5e2be SHA-256: 339fac94fb6e7cdd3c3c6b93d69d60e25f2c28829d37c746880236011f164009
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to free Robux and game hacks to entice users into clicking malicious links. The primary link, http://netcdn.co/app/431946152/free-robux-codes-october-2021-game-hack, is identified as a malicious redirector. The document's content and embedded links strongly suggest a phishing or scam attempt designed to lead users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/free-robux-codes-october-2021-game-hack In PDF document text
    • http://elibrary.fl.unud.ac.id/repository/hack-roblox-dragon-ball-rage-anti-kick_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/robux-earner_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/roblox-devil_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-free-draw_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/hack-infinito-chakra-naruto-final-bond-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-roblox-codes_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/spawn-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/bhop-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/coin-master-cheats-for-free-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/how-do-you-get-free-builders-club-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-spins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/eliot-ring-mig-roblox-jailbreak-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_off00002af2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AF2 22124 bytes
SHA-256: af3e622b6c627d82fcd8323692dba1aadded9aee922db493f7ac27a9b7a19293
font_01_sfnt_off00005bef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BEF 19396 bytes
SHA-256: 462d6b77d93ada6381e81a04f5d86843e573a4db962b9d85b1f175f5c3d6a0cf