Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d88b079a25d396e…

MALICIOUS

PDF

38.2 KB Created: 2021-05-11 06:07:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 54a20fea03c06bb68da499c91d3873cd SHA-1: 2b1f14863b64ce7c8457f23b8a164dc20ceb5544 SHA-256: 8d88b079a25d396e3e419273059a0e8962b7651cbc94cf39a80cd6bbbb14b05e
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious. It uses a clipboard-command (paste-and-run) lure. 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 clean score 0.0334

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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/hack-roblox-players-game-hack PDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000035c9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35C9 27052 bytes
SHA-256: c3459d4e05c53fd5aacc29c929ca602df7234b49b05977d53e7446419aa0f4f6
font_01_sfnt_off00007352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7352 18516 bytes
SHA-256: 90bd1aee5c470a37d92cc59b0941c0b496151a5f4b07a4ca4aaf8cbf88ee13c9

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