Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8ba8db146579986…

MALICIOUS

PDF

28.2 KB Created: 2021-07-18 22:43:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1016ea785a1911e7e25b351689ca019a SHA-1: bcfd3fc4573a3b82917059330fa1a89dc7d2314e SHA-256: c8ba8db1465799862942e2cce58f22815aa64fd9abfb40d8c7d29a57c0348433
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'Robux Hack Me' generator, directing users to a malicious URL. This URL is flagged as a known malicious redirector, indicating an attempt to lead the user to a potentially harmful site. The presence of a download button lure further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier clean score 0.0329

Heuristics 4

  • 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.
  • 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 http://netcdn.tw/app/431946152/robux-hack-me-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
font_00_sfnt_off00001b38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B38 21872 bytes
SHA-256: 9c9c26e41107b994dd14153578347688b9ef65c56027957fb5a8776122cd4b9f
font_01_sfnt_off00004b5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B5C 18632 bytes
SHA-256: c8da56bbbb3df747cf2213435dde956968f4dc6fc6a1da517dd961d035af3807

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