Malicious PDF — malware analysis report

Static analysis result for SHA-256 26ed100020dec33f…

MALICIOUS

PDF

37.9 KB Created: 2021-05-16 20:30:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 59d7f8338dcadb379e3fad50fa059719 SHA-1: 12d43839eef34ec8978a431f15a4bd37770c7fa5 SHA-256: 26ed100020dec33f17b5e0c40fd5539a74f237663db09313418d522d1e3e3c19
92 Risk Score

Malware Insights

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

The PDF contains a high-confidence heuristic for brand-impersonation credential phishing, specifically impersonating Microsoft. It directs users to a suspicious URL, 'https://netcdn.xyz/app/431946152/how-to-hack-to-get-robux-game-hack', which is also flagged as a game hack redirector lure. The document body text reinforces this by mentioning "How To Hack To Get Robux" and a "CLICK HERE TO ACCESS ROBLOX GENERATOR".

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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/how-to-hack-to-get-robux-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/how-to-hack-to-get-robux-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
font_00_sfnt_off00003385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3385 27444 bytes
SHA-256: cda0a75d96383ed541d868f47db81d4d65a400d37bd17d13d2359b04709bb8e4
font_01_sfnt_off00007211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7211 18516 bytes
SHA-256: e2a97b64806b22db336191728b408e5b7179700d4ee5fd3b4b30addea2706a3c