Malicious PDF — malware analysis report

Static analysis result for SHA-256 9179ef693e764d49…

MALICIOUS

PDF

35.0 KB Created: 2021-07-03 10:43:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 426ab7043a1bb8f80ebc0e06bf43931f SHA-1: 9b32929eb688caff7e4939ce03cb72f823aca474 SHA-256: 9179ef693e764d497baed98c2a90d35dcf690869034399658c6b91663cd5639d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to 'free Robux' and game hacks to entice users to click on embedded links. The primary link, http://netcdn.co/app/431946152/free-robux-no-verification-2021-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or scam attempt, likely leading to further malicious content or malware download. The document's creation by wkhtmltopdf suggests it may have been generated programmatically for this purpose.

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/free-robux-no-verification-2021-game-hack In PDF document text
    • https://morishita-tc.com.tw/image/data/files/hacker-vs-noob-vs-pro-roblox_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/are-free-robux-sites-safe_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/new-game-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/daily-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-change-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-free-spins-link-blogspot-april-2021_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-use-wurst_GM479516143.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-minecraft-windows-10-with-java_GM479516143.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-free-spins-hacktman_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-ro-gwet-free-robux-on-tablet-2021_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/static-moonactive-net-free-spins_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/help-robloxcom-free-robux-bc-generators_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/hack-roblox-robux-download_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-hack-without-verification-code-2021_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/whats-robux_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-roblox-animations_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-hack-version-download-2021_GM406889139.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_off00003097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3097 22336 bytes
SHA-256: dc9a0d9e3f00bbe4e04970ece2739fb86e75a69244b478b49fca66e07a2bf2b1
font_01_sfnt_off0000626e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x626E 19476 bytes
SHA-256: 0ea569e2458714af2fc88272f668bb9559ca065cecd410792851a624a05e4648

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