Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c5ba74cab01f55a…

MALICIOUS

PDF

36.9 KB Created: 2021-05-16 12:04:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e826e6d5ac95176d125194093f8e25dd SHA-1: 4cd40ccc19d9f2271ce59b42167924eaa1e6bdad SHA-256: 9c5ba74cab01f55a0b6498ae431ee155bffe460dc6ec92267e7658611c2149f8
130 Risk Score

Malware Insights

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

The PDF document contains a lure for 'free Robux' and a prominent 'CLICK HERE TO ACCESS ROBLOX GENERATOR' call to action. This link redirects to known malicious infrastructure, indicating a phishing or scam attempt. The document's creation by wkhtmltopdf suggests it may have been generated programmatically to host this lure.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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/games-on-roblox-that-give-you-free-robux-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
stream_003_off00003327.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3327 24772 bytes
SHA-256: 5ee725f2371781ad591753405af84ac0355d2d47b7bb93850ee8cf95fcb51663
font_01_sfnt_off00006c45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C45 19240 bytes
SHA-256: 3009583106c638257969d16940e6b1d2d6c9c8cef99a9d3856a451b20885bf07

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