Malicious PDF — malware analysis report

Static analysis result for SHA-256 3963bcb850482d18…

MALICIOUS

PDF

35.2 KB Created: 2021-05-13 02:41:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b53862dfb50d8cebc590655a49041675 SHA-1: 558ff34bd4480bcb6d601ac07243d2ae3ef5d49d SHA-256: 3963bcb850482d188d895baf721dae80b92837defe69ffcd3e65b60d77679f57
170 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a lure for a 'Robux Generator' and a malicious redirector link pointing to 'netcdn.xyz'. It also instructs the user to copy and paste content into a command-line context, suggesting an attempt to execute further commands or scripts. The presence of a malicious redirector and the explicit instruction for command-line interaction indicate a high likelihood of a phishing or social engineering attack aimed at tricking the user into executing malicious code or visiting further compromised sites.

Machine Learning

  • Nyx PDF Classifier clean score 0.0306

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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/robux-generator-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_off000031a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31A5 23860 bytes
SHA-256: 6d3ef6729ddef67aa5df82a7ca20079409b97f2433ed913211aa84f74942ecf7
font_01_sfnt_off00006825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6825 18184 bytes
SHA-256: 6ad13131c8a801fdee9b2b1f688ac66371065e9680419547ef4f25df18f73033

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