Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ac4aa1efc4793de…

MALICIOUS

PDF

41.5 KB Created: 2021-04-23 21:36:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1d5669cf2f6d560fca63f19afd7d5093 SHA-1: 0449752f766c7a58b90e1701b102ea49cd04b9cd SHA-256: 4ac4aa1efc4793de6d2e3ceb859f4f982cd118b3a32aeffe190d17b61f22ee0e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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://netsecure.top/app/431946152/delete-anything-roblox-hack-script-game-hack PDF link annotation
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/free-theme-song-for-roblox-boombox.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/how-to-make-free-roblox-clothes.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/free-t-shirt-roblox-2021.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/how-to-get-free-accessories-on-roblox-2021.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/cheat-engine-for-roblox-jailbreak.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/roblox-hack-bars-2021.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/free-dominus-site-robloxcom.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/guest-chat-cheat-engine-roblox.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/how-to-hack-bc-on-roblox-2021.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/roblox-hack-dll-download.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_off00004158.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4158 25684 bytes
SHA-256: 8e143d2f77414b5313c12c3d5c3b59855cde91d70c63adf33ea42ce69ce6bf7c
font_01_sfnt_off00007cf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF4 19384 bytes
SHA-256: f994dcce23872edc020f63a2f38c2997c491e2fd0618fbb30103f4942ecd9060

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