Malicious PDF — malware analysis report

Static analysis result for SHA-256 b66628d30e88c925…

MALICIOUS

PDF

33.0 KB Created: 2021-07-19 03:34:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 983c684142008df1185f3278d1fa7ce0 SHA-1: 1243caac36698ff3192871c593ff908929848a0f SHA-256: b66628d30e88c925ab1942b3d2e938c21a56656777db192121658cfd78975538
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure, masquerading as "free generators" or "game hacks" to lure users. The primary redirector URL is http://netcdn.tw/app/835599320/how-to-get-verified-on-tiktok-for-free-2021-game-hack. The document body also contains numerous links to other potentially malicious PDF files hosted on beaksandpawsfl.com, suggesting a campaign distributing various lures. No scripts were extracted, but the presence of malicious redirectors and lures indicates a phishing or scam attempt.

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/835599320/how-to-get-verified-on-tiktok-for-free-2021-game-hack In PDF document text
    • http://beaksandpawsfl.com/images/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://beaksandpawsfl.com/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://beaksandpawsfl.com/images/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://beaksandpawsfl.com/images/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://beaksandpawsfl.com/images/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://beaksandpawsfl.com/images/tiktok-likes-free_GM835599320.pdfIn PDF document text
    • http://beaksandpawsfl.com/images/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://beaksandpawsfl.com/images/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://beaksandpawsfl.com/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://beaksandpawsfl.com/images/free-robux-real_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_off00002d85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D85 22228 bytes
SHA-256: 5a86bd3fedc5333d368dbc1744aa09e4dcf3c8b343215aaadb8e3bd8c893a402
font_01_sfnt_off00005e91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E91 18328 bytes
SHA-256: 1054070171948e30c43aa2372c28bb4586f99f9ebf927238267b96eb5d2dcf67