Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd4605b817c5e564…

MALICIOUS

PDF

43.8 KB Created: 2021-05-16 11:33:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0535e3873d6a7af7d49c335e845d17d5 SHA-1: 7da4d35c65ed090c39c491538dbd130dbf9c2969 SHA-256: bd4605b817c5e564d84bf4790c4b8777876498a66b71efbc7de803d0525d3a60
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links that redirect to websites offering game hacks and generators, a common lure for malicious content. The ML classifier strongly flagged this PDF as malicious, and heuristics indicate it links to known malicious redirector infrastructure. While no scripts were extracted, the document's structure and embedded URLs suggest it is designed to lead users to potentially harmful sites, likely for further malware delivery or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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-roblox-generator-game-hack In PDF document text
    • http://fobh.net/userfiles/files/play-full-version-of-minecraft-for-free-no-download_GM479516143.pdfIn PDF document text
    • http://fobh.net/userfiles/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-spin-coin_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://fobh.net/userfiles/files/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-robux-picture_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/coin-master-free-spins-2021-link_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/coin-master-cheats-and-hacks_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/how-to-get-roebucks_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://fobh.net/userfiles/files/coin-master-hack-for-android_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-minecraft-bedrock-server_GM479516143.pdfIn PDF document text
    • http://fobh.net/userfiles/files/roblox-person_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/i-need-robux_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-online-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-spins-link-in-coin-master-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
stream_003_off000047c5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47C5 28916 bytes
SHA-256: 831bd10383c0d300452dd49b04bc3ac35f010d84c2f45f70c12a8731a0e5e630
font_01_sfnt_off000088c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88C5 18280 bytes
SHA-256: a933d21998376b1e1789d4c480c6983ef3f135197d1bc74c37b8b8f8713ff5e6

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