Malicious PDF — malware analysis report

Static analysis result for SHA-256 feebe3d72da5168a…

MALICIOUS

PDF

42.3 KB Created: 2021-05-16 12:08:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3520795052114f11c76227d2d542fba9 SHA-1: d3f5cc673e0e9c49a32343a87e1dc6c61ceed35c SHA-256: feebe3d72da5168a9e8fe4a6bf4439d029d721cc690a0446f51cc378a92a56ca
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free Robux and game hacks to entice users. It contains multiple links to known malicious redirectors, such as https://netcdn.xyz/app/431946152/free-robux-for-free-game-hack, which likely serve further malicious content or lead to additional malicious PDFs. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/431946152/free-robux-for-free-game-hack In PDF document text
    • http://rlsaluminios.com.pt/images/blogspot-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/hack-coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/get-robux-com_GM431946152.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/coin-master-time-hack-ios_GM406889139.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/free-coin-master-spins-blogger_GM406889139.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/minecraft-com-free_GM479516143.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/coin-master-hack-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/coin-master-hack-2021-app-download_GM406889139.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/hack-xp-net-coin-master_GM406889139.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/roblox-sexually_GM431946152.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/www-coin-master-hack-tk_GM406889139.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/what-is-robux-in-roblox_GM431946152.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/free-online-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/woman-roblox_GM431946152.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/minecraft-free-download-mac-full-version-2021_GM479516143.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_003_off000048b4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48B4 25536 bytes
SHA-256: 910068da3e5ced1cdaf84d3e0903aadd6868aaf96a5ec2f9cfe8c81836dae783
font_01_sfnt_off000083f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83F3 18012 bytes
SHA-256: 3ef9e48aa3d97d4217e004f7625a8cbae9320a74231b80a01553f6433e422360

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