Malicious PDF — malware analysis report

Static analysis result for SHA-256 66de7d27eb651efe…

MALICIOUS

PDF

40.6 KB Created: 2021-04-28 09:31:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d23a16df2c9485562ae4873e9ed5ab4f SHA-1: 07f3d1930f48b63d6176577a0a8c9ccb233573d8 SHA-256: 66de7d27eb651efe7e2e260accbe05ea887dc7f2d0e2bfc1d9f35b6af47da6fd
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link disguised as a game hack generator, which is a common lure for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content hosted on external domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/easy-roblox-today-hack-game-hack PDF link annotation
    • http://wattkit.com/images/how-to-get-free-robux-april-2021.pdfIn PDF document text
    • http://wattkit.com/images/free-hair-roblox-edit-avatar.pdfIn PDF document text
    • http://wattkit.com/images/free-white-shirt-roblox.pdfIn PDF document text
    • http://wattkit.com/images/free-robux-script-roblox.pdfIn PDF document text
    • http://wattkit.com/images/comment-avoir-des-free-robux.pdfIn PDF document text
    • http://wattkit.com/images/dayz-og-roblox-cheat-codes.pdfIn PDF document text
    • http://wattkit.com/images/where-can-i-get-free-robux.pdfIn PDF document text
    • http://wattkit.com/images/admin-roblox-hack-2021.pdfIn PDF document text
    • http://wattkit.com/images/hack-apk-roblox-2021.pdfIn PDF document text
    • http://wattkit.com/images/khaos-free-robux-pastebin.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_off000041de.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x41DE 25868 bytes
SHA-256: 6518a3019fc8b4e71231812e03fe1215d15dcb19d28088689b316fcd65b1e891
font_01_sfnt_off00007bec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BEC 18536 bytes
SHA-256: 17837201d5d06819494064da8c285b8fcbc1861ae83296351a33c7901d9148c9

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