Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ea0319f44bdb8e8…

MALICIOUS

PDF

40.5 KB Created: 2021-05-13 20:30:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 92a93e5fdadde19eb0502d9a2e88dfe8 SHA-1: 6eba3331b5303984a4d31459169ef54b574331d4 SHA-256: 0ea0319f44bdb8e86f1e357c1613ff39f4b26bca3f1cb26182faa75e95c11f15
170 Risk Score

Malware Insights

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

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising a 'free Robux hack' and a fake CAPTCHA prompt. The primary malicious URL identified is https://netcdn.xyz/app/431946152/free-robux-hack-no-human-verification-game-hack. This indicates a social engineering lure designed to trick users into executing further malicious actions, likely leading to a second-stage payload download.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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/free-robux-hack-no-human-verification-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000033d8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33D8 26624 bytes
SHA-256: 76d4d480bcc2e500b9e1e476c9e07138b17750f7b3af1f84f3870cb058726785
font_01_sfnt_off00007138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7138 2836 bytes
SHA-256: fd98c8f6e7c2e74bbd5822409159a93ac5c94da083ae4c2eb269d4284375f9e8
font_02_sfnt_off00007add.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ADD 19028 bytes
SHA-256: 768a4e91d7c3975acc2b79a699acb909e0f8bbf2befa87684aa1b4f9aecc197e

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