Malicious PDF — malware analysis report

Static analysis result for SHA-256 5de5b3bd74b4e3a4…

MALICIOUS

PDF

35.5 KB Created: 2021-06-20 08:19:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2a4b4da51fa4e0edc85cdeb773e9aa98 SHA-1: 13028ecad671d44c97e507312f811abf640de9a4 SHA-256: 5de5b3bd74b4e3a46ffe4308ee99b42977de1a30657ed33402b65048c2cbc303
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of game hacks and free in-game items. The ML classifier also flagged this PDF as malicious. The embedded URLs likely lead to further malicious content or malware downloads, indicating a phishing or social engineering attack.

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/how-to-hack-roblox-carlos-admin-house-game-hack In PDF document text
    • http://bufbd.org/images/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/coin-master-free-spins-link-no-verification-code_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/jailbreak-script_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/roblox-skins-hack_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/free-roblox-toy-codes_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • http://bufbd.org/images/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/how-to-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/climrbx-free-robux_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/coin-master-twitter-free-spins_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/i-cant-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/roblox-new-hack-exploit-2021-still-works_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/wwwcoin-master-free-spincom_GM406889139.pdfIn PDF document text
    • http://bufbd.org/images/minecraft-free-download-mac-full-version-2021_GM479516143.pdfIn PDF document text
    • http://bufbd.org/images/roblox-speed-and-jump-hack-2021_GM431946152.pdfIn PDF document text
    • http://bufbd.org/images/roblox-copy-game-hack_GM431946152.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
font_00_sfnt_off0000337a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x337A 22084 bytes
SHA-256: 92f3c5cc9b7ba8c71e6dc84af9dcf72e481c88f0cc5309f7f96701075a150e5a
font_01_sfnt_off00006446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6446 19512 bytes
SHA-256: 39fc75ddea174f4e1dd1d46237117c948793b94890da19a7f160f36694a9c387

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