Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3e20d72e57b55a6…

MALICIOUS

PDF

38.5 KB Created: 2021-05-11 06:50:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bdceaf7eaf3816ca461d9a0b6398a26d SHA-1: 4dd135346b8a63230abd814d5bc1fc17f930ed85 SHA-256: c3e20d72e57b55a626951aa03457c0c532c064db3bc2530a94af72b02f1f049e
92 Risk Score

Malware Insights

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

This PDF document was flagged as malicious. It uses a fake-CAPTCHA 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 0.0127

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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-apk-hack-download-game-hack PDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000317a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x317A 25216 bytes
SHA-256: 8abe7f39263f3eaad1f9f4ab3bc4f52bd913543645cce088a1bd03ff108bfba0
font_01_sfnt_off00006a99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A99 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off0000744b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x744B 18472 bytes
SHA-256: 0e3831818f38ae56d02806b9c0b62f33b1ecd4ca65c3265caa2049c7f667b959

Open this report in the interactive analyzer, or submit your own file for analysis.