Malicious PDF — malware analysis report

Static analysis result for SHA-256 d32755cab534914c…

MALICIOUS

PDF

35.3 KB Created: 2021-06-20 16:23:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 965a16796e552514f77bc1ad8fc01af3 SHA-1: 8d9ecbf80df2eab92c0a7e1af7ba418e47644ec0 SHA-256: d32755cab534914c6afed45eb9d531ecc8e5db74338d1ad6f529d70e54cc393c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and text that lure users with the promise of free Robux, a virtual currency for the game Roblox. The ML classifier strongly flagged this PDF as malicious, and an external URI was found pointing to a suspicious download link. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to deliver a second-stage payload, likely a downloader or trojan.

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/uprobuxcom-free-robux-game-hack In PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/coin-master-heaven-links-free-spins_GM406889139.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/how-to-get-free-followers-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/how-to-get-minecraft-bedrock-for-free-with-java_GM479516143.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/free-roblox-group-botter_GM431946152.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/hack-coin-master-game-apk-download_GM406889139.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/tiktok-free-boost_GM835599320.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/www-robux_GM431946152.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/robux-fun-hack_GM431946152.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/get-free-robux-without-human-verification_GM431946152.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_off000032ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32FF 22364 bytes
SHA-256: a777a6626ab40f243de0e349d241cf74676573dcb7f85059863c59df443292e9
font_01_sfnt_off000064bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64BC 19152 bytes
SHA-256: 77e1d77af257f2799f450e4aedc0e1b3eb2c97b8c20e190c5e1e9f2e5b207ac7

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