Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac96abe197151c64…

MALICIOUS

PDF

43.8 KB Created: 2021-04-30 06:18:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4ce9b51d07901da436190597fb95779b SHA-1: 176ae05f875cf06f02f6dbcf3e2bf2f80387baba SHA-256: ac96abe197151c64d4d55264f8abe348a75917ea370f828a5bc05b729cb5c5c4
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 0.9868

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/roblox-hack-hack-de-robux-2021-game-hack PDF link annotation
    • https://www.bolsoshf.com/ckfinder/userfiles/files/increible-hack-de-robux.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/its-works-roblox-hack.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/how-to-cheat-piano-on-roblox.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/roblox-noclip-no-cheat-engine.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/free-account-and-password-for-roblox-with-robux.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/cheat-codes-for-zombie-apocalypse-roblox.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/how-to-get-free-faces-on-roblox-no-download.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/roblox-scp-foundation-model-free.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/roblox-free-robux-game-guardian.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/free-cookie-codes-for-roblox.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4120 26504 bytes
SHA-256: 5bd100dfa1a97754c911fc7d657ef46c69f38c01350c62c55176153835c5c49d
font_01_sfnt_off00007d74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D74 2848 bytes
SHA-256: 4737c2778a085e0cb49e73f3b054b1a71e3f40720d213b4bfda97f95a31bfbf1
font_02_sfnt_off00008736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8736 18892 bytes
SHA-256: 365c42eba31a4a140e5670ee05525b70a4c73c5aba3a4de700f83d5f164f71d3

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