Malicious PDF — malware analysis report

Static analysis result for SHA-256 42b9e4c3fe2b586c…

MALICIOUS

PDF

39.6 KB Created: 2021-05-12 06:36:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4373e7550106de8ab27d1d1c68d592bc SHA-1: fc2eba1f9a06adbb183963dd762c6f57adc94fe9 SHA-256: 42b9e4c3fe2b586c708df0d6835c88020bbccfc7b33eb5332e7a36cf3f6bed61
130 Risk Score

Malware Insights

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

The PDF document contains a critical heuristic firing for a malicious redirector link, specifically advertising a 'free generator / game hack'. The document body contains text and a button-like phrase encouraging a download, further supporting a lure-based attack. The embedded URL leads to known malicious infrastructure, likely serving as a gateway to a secondary payload or phishing page.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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 https://netcdn.xyz/app/431946152/rbx-gg-free-robux-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_off00003579.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3579 24192 bytes
SHA-256: 18fad540f558ff766d7d06d0ec39f21e5874ed460e38c07acd1f0b0737bc1601
font_01_sfnt_off00006c72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C72 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off0000791a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x791A 18304 bytes
SHA-256: d1ad45f5b083d36c6ec4c124be04f92537ae8dd31535970cb7662339535ad89d

Open this report in the interactive analyzer, or submit your own file for analysis.