Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5791b83411be6bb…

MALICIOUS

PDF

39.1 KB Created: 2021-05-21 06:57:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c6177c0bb7dba8d119b867a5a8c93487 SHA-1: 92971184b98ba3dc8632927facbb3e14cce613f8 SHA-256: e5791b83411be6bb004936b7bac0167280bad259759589b63b2cffc2fcb4d6ec
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 0.9476

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-working-game-hack PDF link annotation
    • http://www.homesweethome.pl/images/coin-master-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/coin-master-hack-tool-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/tiktok-free-view-your-liked-videos_GM835599320.pdfIn PDF document text
    • http://www.homesweethome.pl/images/free-robux-apk_GM431946152.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_002_off00003514.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3514 29000 bytes
SHA-256: 92303ee4f779db5c84ca492c9e8583934c081e75195c7b5764f4388b67bebddc
font_01_sfnt_off00007634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7634 18788 bytes
SHA-256: 146362cb081aa7c6718ebc51132ca2538876dc1922f8d33668898621d3d02efe

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