Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdb570fd082eaa89…

MALICIOUS

PDF

42.0 KB Created: 2021-05-14 22:53:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cba9332679b5c2cc49c72b5dd6d6e571 SHA-1: 12a0c69e8ae43cb4a686a57e394b559a30bb85b1 SHA-256: fdb570fd082eaa8983b22d6e40ff6605fd876ddaf159a0afa4f1b0876ea9909c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as generators or hacks for popular games. The document body and embedded URLs strongly suggest a phishing or scam attempt to lure users to these malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious redirection behavior.

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/406889139/coin-master-free-generator-game-hack In PDF document text
    • https://satuoblong.com/ckfinder/userfiles/files/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://satuoblong.com/ckfinder/userfiles/files/free-spin-app-coin-master_GM406889139.pdfIn PDF document text
    • https://satuoblong.com/ckfinder/userfiles/files/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • https://satuoblong.com/ckfinder/userfiles/files/50-000-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://satuoblong.com/ckfinder/userfiles/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://satuoblong.com/ckfinder/userfiles/files/coin-master-hack-without-root_GM406889139.pdfIn PDF document text
    • https://satuoblong.com/ckfinder/userfiles/files/www-free-robux_GM431946152.pdfIn PDF document text
    • https://satuoblong.com/ckfinder/userfiles/files/easy-way-to-get-robux_GM431946152.pdfIn PDF document text
    • https://satuoblong.com/ckfinder/userfiles/files/impact-minecraft-hack_GM479516143.pdfIn PDF document text
    • https://satuoblong.com/ckfinder/userfiles/files/minecraft-free-download-ipad_GM479516143.pdfIn PDF document text
    • https://satuoblong.com/ckfinder/userfiles/files/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • https://satuoblong.com/ckfinder/userfiles/files/latest-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://satuoblong.com/ckfinder/userfiles/files/www-rubux_GM431946152.pdfIn PDF document text
    • https://satuoblong.com/ckfinder/userfiles/files/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • https://satuoblong.com/ckfinder/userfiles/files/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • https://satuoblong.com/ckfinder/userfiles/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://satuoblong.com/ckfinder/userfiles/files/free-robux-live_GM431946152.pdfIn PDF document text
    • https://satuoblong.com/ckfinder/userfiles/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://satuoblong.com/ckfinder/userfiles/files/coin-master-game-free-play-online_GM406889139.pdfIn PDF document text
    • https://satuoblong.com/ckfinder/userfiles/files/june-29-coin-master-hack-no-human-verification_GM406889139.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_off00004acb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ACB 24656 bytes
SHA-256: 5c641e61dc1f7f25763b0cfe4283722b6eaa89c8c135802b1bd0763bc2ae43bc
font_01_sfnt_off000083a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83A5 17712 bytes
SHA-256: f6b7bbb27796bfdd91832c5c9631b2ef3c604ec4967bc220e21b541acce31e79

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