Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c1b0f7ca9fa2346…

MALICIOUS

PDF

38.2 KB Created: 2021-05-14 23:05:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c68a6dad7a2876662e4e0c137bdb263d SHA-1: a502c0f4bafaec88fdb7b6750109b4ca587b9c5b SHA-256: 1c1b0f7ca9fa23467e05b27d0f760e4fce07f1af9c82afac1bdbe4aee20061e6
170 Risk Score

Malware Insights

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

The PDF document contains a lure for 'Roblox Free Robux Codes' and directs users to a malicious URL, which is associated with a redirector. The document also employs a social engineering tactic by suggesting the installation of a browser extension or plugin, a common method for distributing malware or stealing credentials. The embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/roblox-free-robux-codes-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_off00003332.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3332 27564 bytes
SHA-256: 06894b386e422c364818cde2ad9f2b9183e929c85396c20bf14d62de2a8c301d
font_01_sfnt_off0000743b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x743B 18260 bytes
SHA-256: 40a15a9049e9412bdd5c9a35f1903570ad5947e976b8939b833c9d7797e77bf9

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