Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9e1a8341d515b80…

MALICIOUS

PDF

42.1 KB Created: 2021-05-19 18:26:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7dde34727b8f131c846cb470ccb2c191 SHA-1: 5bb280f99af43a6606db92d2f61e674706591cff SHA-256: f9e1a8341d515b806a3bc618b91b5e20aeb6a685ddbd8577d4381c9479e8904a
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/406889139/2021-free-spins-on-coin-master-game-hack PDF link annotation
    • http://ernstgloves.co.il/images/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://ernstgloves.co.il/images/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://ernstgloves.co.il/images/free-coins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://ernstgloves.co.il/images/rbx-website_GM431946152.pdfIn PDF document text
    • http://ernstgloves.co.il/images/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://ernstgloves.co.il/images/hack-version-of-coin-master_GM406889139.pdfIn PDF document text
    • http://ernstgloves.co.il/images/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://ernstgloves.co.il/images/hack-client_GM479516143.pdfIn PDF document text
    • http://ernstgloves.co.il/images/coin-master-free-coins-and-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://ernstgloves.co.il/images/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
    • http://ernstgloves.co.il/images/coin-master-fun-hack-online_GM406889139.pdfIn PDF document text
    • http://ernstgloves.co.il/images/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://ernstgloves.co.il/images/spin-link_GM406889139.pdfIn PDF document text
    • http://ernstgloves.co.il/images/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://ernstgloves.co.il/images/coin-master-hack-app-2021-download_GM406889139.pdfIn PDF document text
    • http://ernstgloves.co.il/images/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://ernstgloves.co.il/images/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://ernstgloves.co.il/images/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • http://ernstgloves.co.il/images/coin-master-free-spins-2021-today_GM406889139.pdfIn PDF document text
    • http://ernstgloves.co.il/images/free-spin-appscoin-master_GM406889139.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_off00004960.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4960 24896 bytes
SHA-256: 3e7918315ae904fa6fb806767f858b5f884fb2ff30dd80893e673526a4f11ed5
font_01_sfnt_off00008246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8246 18288 bytes
SHA-256: 622f5559f42d42bdf895aa0dd0378bc93f6cb1528ecbdf5ac45ca29ab5b27cb4

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