Malicious PDF — malware analysis report

Static analysis result for SHA-256 498d9b0b4427889e…

MALICIOUS

PDF

34.3 KB Created: 2021-06-29 00:28:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 39eec6c983bf56920f0935fb094b711a SHA-1: 6e92245f7830a3481d275c7c7899aef2095404e8 SHA-256: 498d9b0b4427889e373f092debb27a81964cb48333022cc9f134ea9b4f3984e0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, disguised as 'free generator' or 'game hack' lures. The document body explicitly mentions 'how to get 5 Robux for free 2021' and includes the primary malicious URL. This indicates a phishing or scam attempt designed to lead users to potentially harmful content or further malware downloads.

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/how-to-get-5-robux-for-free-2021-game-hack In PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-master-daily-free-spins-link-today-blog_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/roblox-free-robux-hack-2021-generator-cheat_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/hack-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-roblox-fe-scripts-pastebin-july-2021_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-to-get-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/map-robux-free_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-to-gear-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/make-free-robux_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/where-to-get-robux_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-master-free-spins-cheat-codes_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/minecraft-windows-free_GM479516143.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/roblox-world-pw-free-robux_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/facebook-coin-master_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/hack-para-island-royale-roblox-2021_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/pubg-uc-in-rupees_GM1330123889.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/download-roblox-free-windows-7_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 6

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_off00002dc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DC9 22292 bytes
SHA-256: 55546259e7e3efbfaa62a681e16f39410b1ecb9f92d2b8b45db22395b70e8771
font_01_sfnt_off00005f70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F70 19520 bytes
SHA-256: 07d6438c62fd0745876691e7fe278d44dd385174b00c6334247b932dd086cfd8

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