Malicious PDF — malware analysis report

Static analysis result for SHA-256 429c5bf83af2cd80…

MALICIOUS

PDF

35.5 KB Created: 2021-05-13 02:31:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0311c137ec70e44ef16845d94e0bbe78 SHA-1: 4df39afa766c4e55438956837e40d424aea8477c SHA-256: 429c5bf83af2cd8082ea0a2139e530090fcb0282d5fb32418b4ee91798d4764e
210 Risk Score

Malware Insights

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

The PDF document contains a lure for free Robux or game hacks, impersonating Microsoft and directing users to a malicious URL. This URL is associated with known malicious redirector infrastructure and is designed to trick users into providing credentials or executing further malicious actions, potentially via a fake CAPTCHA prompt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0306

Heuristics 6

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/earn-free-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
  • 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/earn-free-robux-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000333d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x333D 23840 bytes
SHA-256: 3690f2d74ee76e54f9740ea3a3c8acd943972487dff96602697db8b388cbee22
font_01_sfnt_off00006955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6955 18244 bytes
SHA-256: 032754c85be32afc54ce42ff57082bfda3d842c531a4409870c690b3212eb60e

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