Malicious PDF — malware analysis report

Static analysis result for SHA-256 16f417b2c39f481b…

MALICIOUS

PDF

31.9 KB Created: 2021-07-19 15:24:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 70637fb2dbcdebf74ce8aa071f4c690b SHA-1: 2a3e20a22c0b8242c5b48185a58940e2399c1573 SHA-256: 16f417b2c39f481bf438aa308a7e56d1ba035e423ee666c3ed70344a1bee3f76
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures for game hacks and free currency, indicating a phishing or scam attempt. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the embedded URLs are the primary mechanism for delivering the malicious payload or redirecting the user to a compromised site.

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/406889139/free-spins-coin-master-app-game-hack In PDF document text
    • http://baah.ca/images/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://baah.ca/images/free-tiktok-followers-without-verification_GM835599320.pdfIn PDF document text
    • http://baah.ca/images/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://baah.ca/images/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://baah.ca/images/free-robux-games_GM431946152.pdfIn PDF document text
    • http://baah.ca/images/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://baah.ca/images/free-robux-please_GM431946152.pdfIn PDF document text
    • http://baah.ca/images/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://baah.ca/images/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://baah.ca/images/free-robux-for-kids_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
stream_002_off00002a64.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A64 22240 bytes
SHA-256: a0385664ad5538cc2af88b4facd133f4ef7dddd2bf4f21e2f9a8ab9a4754ac2c
font_01_sfnt_off00005be6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE6 17884 bytes
SHA-256: ed1ea3c4e7635b9f65a5e0b6798c92341d7c1feababf17669f4466b6be8364ea

Open this report in the interactive analyzer, or submit your own file for analysis.