Malicious PDF — malware analysis report

Static analysis result for SHA-256 3620d090363146ff…

MALICIOUS

PDF

35.4 KB Created: 2021-05-10 11:42:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 49e95e4bfbd69b63e6af0f3f4e070ce5 SHA-1: b2c8fd010fea62114c020fb8c06e93ac889131dd SHA-256: 3620d090363146ff795dd7d1f84ee07e94f8327d66bee7c55a40816101b0fdc3
92 Risk Score

Malware Insights

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

The PDF contains a high-severity heuristic indicating it links to a game hack lure, impersonating Facebook. The embedded URL, https://netcdn.xyz/app/406889139/coin-master-online-hack-link-game-hack, is presented as a call-to-action for accessing a 'Coin Master Online Hack Link'. This strongly suggests a credential phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0306

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/406889139/coin-master-online-hack-link-game-hack.
  • 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-online-hack-link-game-hack PDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000032b3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32B3 24328 bytes
SHA-256: b47bb7a736a46607a0096a171e205a1dcd66515342b4ed3f469eb02de9ed345a
font_01_sfnt_off00006a3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A3F 17788 bytes
SHA-256: dd7a4057587595e78019333ccc667320d6d804c022730983449509c018bf4689