Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed1ffffa723b9f31…

MALICIOUS

PDF

36.4 KB Created: 2021-05-18 05:00:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e3a1a41f0e5a95365043e5668fac29f9 SHA-1: afa3cac2b95f55439d066303350d60ba1a416aeb SHA-256: ed1ffffa723b9f31de60abe3eef86ca9712dfc1b9dd5a73dd5e00ec96fc5ce58
170 Risk Score

Malware Insights

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

The PDF file contains a lure related to "free generator / game hack" and a fake CAPTCHA, designed to trick users into clicking malicious links. The primary link identified, https://netcdn.xyz/app/431946152/how-to-hack-roblox-accounts-for-robux-game-hack, is flagged as a malicious redirector. The document body, though partially corrupted, reinforces the theme of hacking Roblox accounts and includes calls to action for accessing a generator, further supporting the phishing and social engineering attack pattern.

Machine Learning

  • Nyx PDF Classifier clean score 0.0292

Heuristics 5

  • 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
  • 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/how-to-hack-roblox-accounts-for-robux-game-hack In PDF document text
    • https://www.roblox.coIn 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_off00002ed2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2ED2 27048 bytes
SHA-256: bd71caf7b86040c01a91899c7da814d9c62dcf5e88abfa6b5a03df73c5665ff8
font_01_sfnt_off00006b62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B62 18756 bytes
SHA-256: 937dc084e295f5db9e9abf98e8d9ece9a75bef1f1a22520950dbcf80e1ec543e

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