Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f74cf5d92d84668…

MALICIOUS

PDF

33.9 KB Created: 2021-06-19 18:51:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 73a463e549f99bd8d3e2aa844417693d SHA-1: d4e4401198f44e014870b0beb3429886ad777b56 SHA-256: 2f74cf5d92d84668069171c7297e44ab158ae008c62c380685d134cd0092a789
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links and document body text that promote game hacks and free in-game items for popular games like Roblox and Coin Master. These links predominantly point to a malicious redirector infrastructure, specifically http://netcdn.co/app/431946152/roblox-hack-to-get-on-accont-game-hack, which is designed to lead users to potentially harmful content. The heuristic firings confirm the malicious nature of these links and the overall lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.co/app/431946152/roblox-hack-to-get-on-accont-game-hack In PDF document text
    • https://www.serraw.com/uploaded_files/userfiles/files/coin-master-free-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • https://www.serraw.com/uploaded_files/userfiles/files/free-robux-by-watching-videos_GM431946152.pdfIn PDF document text
    • https://www.serraw.com/uploaded_files/userfiles/files/free-robux-legit_GM431946152.pdfIn PDF document text
    • https://www.serraw.com/uploaded_files/userfiles/files/free-spins-on-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • https://www.serraw.com/uploaded_files/userfiles/files/is-minecraft-free_GM479516143.pdfIn PDF document text
    • https://www.serraw.com/uploaded_files/userfiles/files/coin-master-gift-hack_GM406889139.pdfIn PDF document text
    • https://www.serraw.com/uploaded_files/userfiles/files/roblox-hacking-chrome-extension_GM431946152.pdfIn PDF document text
    • https://www.serraw.com/uploaded_files/userfiles/files/free-coin-master-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.serraw.com/uploaded_files/userfiles/files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.serraw.com/uploaded_files/userfiles/files/spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.serraw.com/uploaded_files/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.serraw.com/uploaded_files/userfiles/files/free-obey-items-roblox_GM431946152.pdfIn PDF document text
    • https://www.serraw.com/uploaded_files/userfiles/files/coin-master-latest-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • https://www.serraw.com/uploaded_files/userfiles/files/minecraft-xbox-360-free_GM479516143.pdfIn PDF document text
    • https://www.serraw.com/uploaded_files/userfiles/files/free-spin-links-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.serraw.com/uploaded_files/userfiles/files/free-daily-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://www.serraw.com/uploaded_files/userfiles/files/hack-speed-roblox_GM431946152.pdfIn PDF document text
    • https://www.serraw.com/uploaded_files/userfiles/files/hacks-to-get-robux-in-tower-of-hell-may-2021_GM431946152.pdfIn PDF document text
    • https://www.serraw.com/uploaded_files/userfiles/files/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://www.serraw.com/uploaded_files/userfiles/files/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FAB 21952 bytes
SHA-256: 8e61f4bb82fecfc4a061f19164b875463c72b3df8f655a4b965ae2c73dd1236c
font_01_sfnt_off0000601d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x601D 18760 bytes
SHA-256: 05b9cc67f6d3de4b094a29fb84e728b1d6efaa18000859a31a992e8c54e10f1a

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