Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c5df4db943b55e6…

MALICIOUS

PDF

35.4 KB Created: 2021-05-14 20:23:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8aee8cc41cc33ef356edf74cd80e9080 SHA-1: 26dc06275aea938afb62490166148f35dcf1f3eb SHA-256: 5c5df4db943b55e69a52259c0707b19d065bb471f024774b375dc3d962638aa5
170 Risk Score

Malware Insights

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

The PDF document contains multiple heuristics indicating malicious intent, including links to known malicious redirectors and a fake CAPTCHA lure. The embedded URL 'https://netcdn.xyz/app/431946152/roblox-apocalypse-rising-hack-game-hack' is identified as a malicious redirector. The document's content and structure suggest it is designed to trick users into executing further malicious actions, likely by leading them to a site that exploits vulnerabilities or prompts further downloads.

Machine Learning

  • Nyx PDF Classifier clean score 0.0080

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/roblox-apocalypse-rising-hack-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
font_00_sfnt_off00002631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2631 23684 bytes
SHA-256: 189eeb2296679266d137c5a05b49aeb619be5b27e2af0b6403a0076059e35f7c
font_01_sfnt_off00005c2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C2F 3500 bytes
SHA-256: e49a868379cd3c37e631c5a53c010e21f38d803532a2b8417aee82315d4e8634
font_02_sfnt_off000067d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67D1 18516 bytes
SHA-256: 3a31124ec77371557d01d106acddaf3588e859a7c6ae43d93e4945f10b7c6712

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