Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f9f505fecd6cff4…

MALICIOUS

PDF

32.8 KB Created: 2021-07-19 05:20:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a3d5275024e36f30a56ba0ca6fd5609c SHA-1: d61cd8e809e20d44597199b963d24a2466980a2b SHA-256: 8f9f505fecd6cff4bb589a7faebf42d3835ad8e3aa425639b5b2e5e11792502e
160 Risk Score

Malware Insights

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

This PDF document contains multiple links to redirector domains, including one that explicitly advertises a 'free generator / game hack'. The document body also contains a call to action to access a Robux generator. These elements strongly suggest a social engineering lure designed to trick users into visiting malicious sites, likely for phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/how-do-u-get-free-robux-game-hack In PDF document text
    • http://agritrade-ukraine.com/images/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/free-robux-come_GM431946152.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/free-robux-websites-2021_GM431946152.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_off00002b0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B0D 22520 bytes
SHA-256: 25a6ba5ba74f8fffb04af5cccbcc32d4cb0d1d9f1c8f83d9498627021d854771
font_01_sfnt_off00005d30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D30 18636 bytes
SHA-256: ab6f51fdb1eed883fd21dff3bd0336e3a1b816e6c21a8924207bfe84ed9a007e

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