Malicious PDF — malware analysis report

Static analysis result for SHA-256 6605e99b5ea3d976…

MALICIOUS

PDF

42.8 KB Created: 2021-05-13 01:07:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 177fe7bd0f90586c10ff79a29579eba6 SHA-1: 50a72282310b27a871e9003ac09badf9d341acfe SHA-256: 6605e99b5ea3d9762a0a6ac6c3280cd624a4740fbbe764e63ab1401e6f8ae320
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a "robux gift card free game hack" which redirects to a malicious URL. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it is designed to redirect users to potentially malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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 https://netcdn.xyz/app/431946152/robux-gift-card-free-game-hack PDF link annotation
    • http://library.fk.upnvj.ac.id/repository/free-rare-cards-for-coin-master-christmas_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-bux-free_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-hack-spins-android_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-free-pets_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/doctor-louie-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-hack-ios-cydia_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/is-coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-re_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-game-free-download_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/get-free-robux-info_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_off00004978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4978 25152 bytes
SHA-256: 123d8afb20cb5339a376a991282cc99e08c0c17abb4f5a0b8fff6c91e820a5de
font_01_sfnt_off000083c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83C6 18640 bytes
SHA-256: dc19c2dc7c571358abc7904f3409549de68542ff7a2dde77b507fd070c6276df

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