Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d5e2d0899e46525…

MALICIOUS

PDF

42.2 KB Created: 2021-05-17 08:38:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 48e631e79ac1ee59789db761d2b65805 SHA-1: d92dd86284daafc05cc66f5bc35a0a8994f3ddc9 SHA-256: 6d5e2d0899e46525bb5b2f8c5df8c27eb62c79f842610c5bf41442763e26eb31
170 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to a 'free generator / game hack' lure, masquerading as a fake CAPTCHA or human verification prompt. This is designed to trick users into clicking the malicious link, which leads to further malicious infrastructure. The document's content and heuristics strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0125

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-get-free-roebucks-in-roblox-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_off000035c1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35C1 29168 bytes
SHA-256: fd7a34775b8df7a0ab045d0fb815b8c47a2bfffaf8b09824c4cefc10bb889ae8
font_01_sfnt_off00007883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7883 2984 bytes
SHA-256: 889cfc2fd0afa9ea114d6666204c6ce0548d0aae2cba345827d317498c4c06bc
font_02_sfnt_off000082af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82AF 18524 bytes
SHA-256: 6a418ba74ae5328d563bd5a35238a9b9c08fdc9000a9cbda284a157467e29bc0

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