Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f9374621f574338…

MALICIOUS

PDF

36.9 KB Created: 2021-05-21 21:12:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 0653f9bc93e3dd6a5ef3d60e9f56f218 SHA-1: d7f6826619eb3b46521ec98268511a7c80220299 SHA-256: 5f9374621f574338e6bf07841375e0c97753bf438da2fbfdb1e4fbcaee35a6e7
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 0.9447

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-free-spins-and-coins-today-gift-reward-game-hack PDF link annotation
    • http://www.eptaviation.com/images/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.eptaviation.com/images/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://www.eptaviation.com/images/coin-master-hack-apk-with-fb-login-2021_GM406889139.pdfIn PDF document text
    • http://www.eptaviation.com/images/minecraft-pe-hack-client-2021_GM479516143.pdfIn PDF document text
    • http://www.eptaviation.com/images/how-to-get-free-roblox-money_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_off000035ba.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35BA 24668 bytes
SHA-256: 150c4db008c1d747de0df7d3cb7e0534cac6fccd1fa098f3ea73b46d98f0969a
font_01_sfnt_off00006e5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E5C 18404 bytes
SHA-256: 20323906fae34ef48fb3028b175607ed26afea8233a7a83525bcd6516f32abbb

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