Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae85b8e5062eade9…

MALICIOUS

PDF

39.6 KB Created: 2021-04-28 22:21:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 03920c2e71dab118554af520ebad3c4b SHA-1: fa81dad387906168259cee130769a8b02f2d4f6e SHA-256: ae85b8e5062eade933014d594c863ac9d33c07ed2f0b1ff13331f5a79b1a388d
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/site-robux-free-game-hack PDF link annotation
    • http://uilis.unsyiah.ac.id/ebook/repository/free-mobile-24-roblox.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/how-to-get-free-bc-in-roblox-pastebin.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/roblox-tower-battles-cheat-engine.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/how-to-get-free-robux-on-hp-laptop.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/roblox-hack-pretty-face-hack.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/roblox-radio-free.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-vip-server-for-speed-race-game-roblox.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/roblox-hack-for-android-no-survey.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/comment-telecharger-un-hack-sur-roblox-fr.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-robux-using-chrome.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_off00003fa7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3FA7 24816 bytes
SHA-256: 1e43ba4b1e8fe5b88acad470db9c26449a1880a23c1782955a1eeefb57c1d4b4
font_01_sfnt_off00007909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7909 18236 bytes
SHA-256: d00cc10d0c5945657c1473c0f741a8af461ed90a3bfe142fa7fa1738f12fafda

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