Malicious PDF — malware analysis report

Static analysis result for SHA-256 e773e4c1c39b3915…

MALICIOUS

PDF

36.3 KB Created: 2021-05-14 15:30:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c9d335c5cbae4258237610d09cbaa50a SHA-1: 1e574c0e29889503cc00a90a01c17b2dd3d79f6a SHA-256: e773e4c1c39b391575f3302fe7b615b9ddcb8e7037b4e4e84b4f80cdd88f9ed9
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure for a "free Roblox hack" and impersonates Microsoft, directing users to a suspicious URL. This indicates a likely credential phishing or malware distribution attempt. Although no scripts were extracted, the embedded URL is a high-confidence indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier clean score 0.0312

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/431946152/free-roblox-hack-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/431946152/free-roblox-hack-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_off0000325e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x325E 25184 bytes
SHA-256: 9e252522468bfe73656c0930eb775ba4bc7def83947d764e9113bc9319f8a79f
font_01_sfnt_off00006c7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C7E 18344 bytes
SHA-256: 9d921b2eee93f33e2efc5c53c848117e08d630d06cf868d7193b51dd4894dd93

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