Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8fae5ad8bba56d7…

MALICIOUS

PDF

32.6 KB Created: 2021-07-20 01:50:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5ef24915d6ebbb911fb0651dda1cf961 SHA-1: 14843f0ee492e677cc92327980870b766313e493 SHA-256: a8fae5ad8bba56d7f1a5ba36cab08ba8a3d136aca86d83596408ee55a7c79b95
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 0.9900

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 http://netcdn.tw/app/431946152/free-robux-games-game-hack PDF link annotation
    • http://iprep-u.com/images/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • http://iprep-u.com/images/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://iprep-u.com/images/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://iprep-u.com/images/free-tiktok-accounts-and-passwords_GM835599320.pdfIn PDF document text
    • http://iprep-u.com/images/coin-master-free_GM406889139.pdfIn PDF document text
    • http://iprep-u.com/images/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://iprep-u.com/images/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://iprep-u.com/images/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
    • http://iprep-u.com/images/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://iprep-u.com/images/free-tiktok-fans-and-likes_GM835599320.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
font_00_sfnt_off000029f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29F5 22460 bytes
SHA-256: 4cf4bd0598d681775995e09d6e021e6162347a10293d38aadeac84b1da5fcd9b
font_01_sfnt_off00005c29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C29 18688 bytes
SHA-256: cce6e7e5a096521b5b5ec4ff0b193c559fac45617ac9f488da8110da90a49876

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