Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d3e8657fdaff7db…

MALICIOUS

PDF

40.7 KB Created: 2021-04-26 23:11:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0df26359ea1e1780e4f544ad9d695218 SHA-1: 1aef3bf7175e1151b2de84200624b9554f82e829 SHA-256: 3d3e8657fdaff7dbb606c1115ce089d05702c0726316536d7288f3fc9e78315c
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://netcdn.xyz/app/431946152/roblox-robux-hack-online-generator-tool-game-hack PDF link annotation
    • https://lib-stie.yai.ac.id/repository/free-robux-hack-forum-by-envix.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-apocalypse-rising-cheats.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/r17-roblox-hack.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/game-stealing-service-free-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-speed-hack-2021-may.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/cute-free-roblox-clothes.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-health-cheat.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/cheat-to-add-money-to-roblox-lumber.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/google-give-me-free-robux.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-prison-life-hacking-why-is-this-even-a-thing.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_off0000407c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x407C 26924 bytes
SHA-256: 50e541ecf2788f848e4d0191ec9c78c993bccb8c1fbb8c04be6dceca63772104
font_01_sfnt_off00007c85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C85 18544 bytes
SHA-256: d1447ea33ca0d85366c9f11986c8aaf00cf1c3602982232f847ea76bdd48a22f

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