Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cb3ef095b7a0218…

MALICIOUS

PDF

41.0 KB Created: 2021-05-16 20:38:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7114ae9b7c6985cbc5c6a5e98a581af8 SHA-1: d5ec2fe6abeea39322fa94bbff1ef86bc59515ee SHA-256: 3cb3ef095b7a021810536c58e57923781224b862684911f8411720b26ca3d86e
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 0.9971

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/406889139/coin-master-hack-facebook-game-hack PDF link annotation
    • http://rushxpress.de/images/free-spins-and-coins-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://rushxpress.de/images/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://rushxpress.de/images/coin-master-com_GM406889139.pdfIn PDF document text
    • http://rushxpress.de/images/coin-master-free-spins-fb-champion_GM406889139.pdfIn PDF document text
    • http://rushxpress.de/images/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://rushxpress.de/images/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://rushxpress.de/images/coin-master-hack-2021-app-download_GM406889139.pdfIn PDF document text
    • http://rushxpress.de/images/coin-master-2021-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://rushxpress.de/images/free-domain-for-minecraft-server_GM479516143.pdfIn PDF document text
    • http://rushxpress.de/images/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://rushxpress.de/images/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • http://rushxpress.de/images/coinmaster-free-cards_GM406889139.pdfIn PDF document text
    • http://rushxpress.de/images/get-coin-master-spins-free_GM406889139.pdfIn PDF document text
    • http://rushxpress.de/images/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://rushxpress.de/images/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://rushxpress.de/images/www-coinmaster-com_GM406889139.pdfIn PDF document text
    • http://rushxpress.de/images/coin-master-free_GM406889139.pdfIn PDF document text
    • http://rushxpress.de/images/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • http://rushxpress.de/images/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://rushxpress.de/images/minecraft-free-education_GM479516143.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_off00004531.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4531 25980 bytes
SHA-256: 6754bcabc2ef311e383ae547cb1f367b33fd3ae59018008fcfec604d10f95747
font_01_sfnt_off00007eb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EB2 18040 bytes
SHA-256: a8842bd0617fa86dd082827eea584dec3a7ee10a35fb1e5666a6d76cd5718c44