Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cf695f1d5a4aaa7…

MALICIOUS

PDF

30.1 KB Created: 2021-07-19 08:51:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 73ddc098939cc10d3f9fc7b2c43d4038 SHA-1: a6177362692937d18eb414bc6c082e60bb8d0a0a SHA-256: 2cf695f1d5a4aaa78c483347741679e1bf644b85048b2a1904d5635e76fd5eba
130 Risk Score

Malware Insights

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

The PDF document contains a lure for a 'Free Robux Hack' and embeds a link to a known malicious redirector. This suggests a phishing or scam attempt designed to lead the user to a malicious site. The heuristic firings indicate the document is designed to redirect users to potentially harmful content, likely for financial gain or to serve as a downloader for other malware.

Machine Learning

  • Nyx PDF Classifier clean score 0.0556

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 http://netcdn.tw/app/431946152/free-robux-hack-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_off000020d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20D7 22508 bytes
SHA-256: 8fe55f75229f12b346e8caf80e6d40fd79874c3efb6ac876c2cc2155a36b7cff
font_01_sfnt_off00005313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5313 18600 bytes
SHA-256: 396239e8b43e5cb835d10c8894d5657298dbd9c370cdf87998bbc4c73774b087

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