Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9c912f6b27b76e5…

MALICIOUS

PDF

34.1 KB Created: 2021-07-19 04:42:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 860f37461a23ca7cf72f9206fbc6ad6b SHA-1: a7a0fee901dc479beb288dc507e9b066ae6e1160 SHA-256: d9c912f6b27b76e5cf4339a4bae7605dec7b1ff4120a877e9ccdd04fed395236
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector at http://netcdn.tw/app/431946152/real-free-robux-codes-game-hack, which is presented as a 'free generator' or 'game hack'. The document body also contains a call to action to 'CLICK HERE TO ACCESS ROBUX GENERATOR'. This indicates a phishing or scam attempt designed to trick users into downloading potentially malicious content. No scripts were extracted, but the presence of multiple embedded URLs and the lure suggest a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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/real-free-robux-codes-game-hack In PDF document text
    • http://henrikedmark.com/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://henrikedmark.com/images/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://henrikedmark.com/images/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://henrikedmark.com/images/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://henrikedmark.com/images/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://henrikedmark.com/images/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://henrikedmark.com/images/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • http://henrikedmark.com/images/free-views-on-tiktok_GM835599320.pdfIn PDF document text
    • http://henrikedmark.com/images/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://henrikedmark.com/images/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn 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_off00002da2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DA2 23240 bytes
SHA-256: 128f3734f65fd288856c90aad73418b897c5fde9d6b71d262cde78f0706e63b1
font_01_sfnt_off00006221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6221 18676 bytes
SHA-256: d997f8dbe5fc9170266e0fe06da81ef1f9b40d7de8e1f17e13013b91ed06a44c