Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bc5d0598d05455d…

MALICIOUS

PDF

43.1 KB Created: 2021-05-19 02:01:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 76c9bd9f1bf568511e8c623e0f775d4b SHA-1: 651b77068b667b7d6f6114bcef369de63da67e45 SHA-256: 4bc5d0598d05455d9a522ace525127a21e5c8386fefb29837e9d16491e554a45
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for free game hacks, specifically mentioning 'Robux' and linking to a suspicious URL. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially malicious sites that may host further exploits or malware.

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/how-to-get-free-robux-easy-hack-game-hack PDF link annotation
    • https://www.roltechnik.hu/images/minecraft-toys-for-free_GM479516143.pdfIn PDF document text
    • https://www.roltechnik.hu/images/hacks-for-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://www.roltechnik.hu/images/wurst_GM479516143.pdfIn PDF document text
    • https://www.roltechnik.hu/images/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • https://www.roltechnik.hu/images/cheats-coin-master-free_GM406889139.pdfIn PDF document text
    • https://www.roltechnik.hu/images/coin-master-hack-app-for-ios_GM406889139.pdfIn PDF document text
    • https://www.roltechnik.hu/images/200-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.roltechnik.hu/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.roltechnik.hu/images/coin-master-400-spin-link-today_GM406889139.pdfIn PDF document text
    • https://www.roltechnik.hu/images/coin-master-free-spins-link-iphone_GM406889139.pdfIn PDF document text
    • https://www.roltechnik.hu/images/robux-get-com_GM431946152.pdfIn PDF document text
    • https://www.roltechnik.hu/images/coin-master-tricks_GM406889139.pdfIn PDF document text
    • https://www.roltechnik.hu/images/coin-master-free-spin-no-offers_GM406889139.pdfIn PDF document text
    • https://www.roltechnik.hu/images/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://www.roltechnik.hu/images/coin-master-free-spins-hacktman_GM406889139.pdfIn PDF document text
    • https://www.roltechnik.hu/images/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • https://www.roltechnik.hu/images/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • https://www.roltechnik.hu/images/hack-minecraft_GM479516143.pdfIn PDF document text
    • https://www.roltechnik.hu/images/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.roltechnik.hu/images/oprewards-com-earn_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
stream_003_off000047e1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47E1 26004 bytes
SHA-256: f7573e04bc8f9e6c05298eaa8bd9c2b83527616958aa786cc88d01125183406c
font_01_sfnt_off0000841d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x841D 18860 bytes
SHA-256: ae4481784f2b59baf7f887bcc8933de4398304efe668e0a39e1c63b4066a7356

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