Malicious PDF — malware analysis report

Static analysis result for SHA-256 6272d20e963cf206…

MALICIOUS

PDF

36.3 KB Created: 2021-05-12 16:01:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9c6b359b990945046d730c3d3934a808 SHA-1: 2c46f58a9664cffcdf08f69d34108fb157175ca3 SHA-256: 6272d20e963cf2063db94aebdb23dc0b881dae54c9285fecc2fda18f15dc36b5
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1071.001 Web Protocols

The PDF contains heuristics indicating it is a lure for a "free generator / game hack" and impersonates the UPS brand, directing users to a suspicious URL. The document body contains text related to "Robux Free Gift Card Org Hack" and a call to action to access a "Roblox Generator". The primary malicious URL is https://netcdn.xyz/app/431946152/robux-free-gift-card-org-hack-game-hack, which is likely used for credential phishing or to deliver a second-stage payload.

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/robux-free-gift-card-org-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/robux-free-gift-card-org-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_off000031dd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31DD 24692 bytes
SHA-256: cc3684afdd7d04fd73c831a125091fd84d435900146cbdf82165337ea9a33956
font_01_sfnt_off00006a03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A03 19096 bytes
SHA-256: bb2bfd1b5c80cb1744cd57562806e4410c1e72fb9e1ed3dff7cfd9b3dcead9ac

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