Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8033dd74d6042b3…

MALICIOUS

PDF

53.5 KB Created: 2021-06-02 01:13:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6e24a658815770aaff24f5fc4a56dd62 SHA-1: 7c3dada9dfca5fa7d48e167ffcda66d85b7b1d24 SHA-256: e8033dd74d6042b32b9d248d6d10b381b1edfb63c0deb9900bab1d615d3e3ca4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a high-severity heuristic indicating it links to a 'free generator / game hack' redirector, which is a common lure for malicious content. The embedded URL, https://netcdn.xyz/app/431946152/best-free-fortnite-roblox-game-game-hack, likely leads to a malicious payload or phishing site. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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/best-free-fortnite-roblox-game-game-hack PDF link annotation
    • https://forensicsinstitute.org/wp-content/uploads/fsqm-files/roblox-prison-break-cheats_GM431946152.pdfIn PDF document text
    • https://forensicsinstitute.org/wp-content/uploads/fsqm-files/castle-black-free-to-take-roblox_GM431946152.pdfIn PDF document text
    • https://forensicsinstitute.org/wp-content/uploads/fsqm-files/roblox-hack-slx_GM431946152.pdfIn PDF document text
    • https://forensicsinstitute.org/wp-content/uploads/fsqm-files/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://forensicsinstitute.org/wp-content/uploads/fsqm-files/how-to-get-free-robux-on-roblox-2021-no-hacks_GM431946152.pdfIn PDF document text
    • https://forensicsinstitute.org/wp-content/uploads/fsqm-files/hacking-into-denis-daily-account-roblox_GM431946152.pdfIn PDF document text
    • https://forensicsinstitute.org/wp-content/uploads/fsqm-files/free-robux-generator-2021-real_GM431946152.pdfIn PDF document text
    • https://forensicsinstitute.org/wp-content/uploads/fsqm-files/free-camera-not-activating-roblox_GM431946152.pdfIn PDF document text
    • https://forensicsinstitute.org/wp-content/uploads/fsqm-files/how-to-hack-dorm-life-on-roblox_GM431946152.pdfIn PDF document text
    • https://forensicsinstitute.org/wp-content/uploads/fsqm-files/free-wings-roblox-2021_GM431946152.pdfIn PDF document text
    • https://forensicsinstitute.org/wp-content/uploads/fsqm-files/how-to-hack-your-old-roblox-account_GM431946152.pdfIn PDF document text
    • https://forensicsinstitute.org/wp-content/uploads/fsqm-files/redeem-hack-roblox-2021-robux_GM431946152.pdfIn PDF document text
    • https://forensicsinstitute.org/wp-content/uploads/fsqm-files/hack-roblox-games-pastebin_GM431946152.pdfIn PDF document text
    • https://forensicsinstitute.org/wp-content/uploads/fsqm-files/flamingo-free-draw-roblox_GM431946152.pdfIn PDF document text
    • https://forensicsinstitute.org/wp-content/uploads/fsqm-files/roblox-create-free-vip-servers_GM431946152.pdfIn PDF document text
    • https://forensicsinstitute.org/wp-content/uploads/fsqm-files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://forensicsinstitute.org/wp-content/uploads/fsqm-files/roblox-top-free-robux_GM431946152.pdfIn PDF document text
    • https://forensicsinstitute.org/wp-content/uploads/fsqm-files/free-robux-generator-no-quiz_GM431946152.pdfIn PDF document text
    • https://forensicsinstitute.org/wp-content/uploads/fsqm-files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://forensicsinstitute.org/wp-content/uploads/fsqm-files/mad-city-roblox-cheat-synapse_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_004_off000055c7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x55C7 40784 bytes
SHA-256: c702a3452e0f89cd3efd957465e182c4db5e9924bed5557a175c2f96b2f6d51a
font_01_sfnt_off0000ae64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE64 18660 bytes
SHA-256: fce129311305d6e409cc286a66bb7933dc47827ca364e0b8ccd1ab7e0b12c0c5

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