Malicious PDF — malware analysis report

Static analysis result for SHA-256 e20fc4ddad9716fe…

MALICIOUS

PDF

51.5 KB Created: 2021-04-29 19:09:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b7a3b7be6b6f43946a1e0d62861095f6 SHA-1: 2ad6ee3f733d3489dda33722cf5b3321bd8d1ef0 SHA-256: e20fc4ddad9716fe56cecede10536863beac0f84ccfc21173ad6428818ab4e43
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 0.9491

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/free-robux-codes-redeem-game-hack PDF link annotation
    • https://lib-stie.yai.ac.id/repository/does-roblox-hack-your-computer.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/como-tener-robux-gratis-2021-hack.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-animations-on-roblox-for-free.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-i-want-to-break-free.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-2021-xtill-working.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/5-games-that-actually-give-you-free-robux.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-make-an-audio-on-roblox-free.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-uganda-knuckles-morph-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/edit-roblox-game-code-cheat-engine-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-prison-life-hack-pastebin.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000043d9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x43D9 26576 bytes
SHA-256: 78c6256dbdf3fc6f3c26fbf4fcb453729e6cb6c74214b4d4d736ccde4436f987
font_01_sfnt_off00007f82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F82 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00008c26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C26 11440 bytes
SHA-256: 154d59d1680f2d1e38ccb783d6997f344290d121007e51df331726de4128c12e
font_03_sfnt_off0000a747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA747 18448 bytes
SHA-256: 40d867dfbcd8cbd28ee75fe84c924c91d60b1854c0f4ac576074db996297a454

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