Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d83b6973c723ce4…

MALICIOUS

PDF

35.7 KB Created: 2021-07-04 14:27:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 11a7ca6cf4fa4e2454ab947cbdf9a913 SHA-1: e652a0b1bf86f272a6a8f00641b052a4ced2ec41 SHA-256: 3d83b6973c723ce4e8b162fa5c60295aabc87d4f7063573d7b5000af9d288a83
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors and game-related lures, such as 'hacked Roblox accounts' and 'free Robux'. The primary malicious URL identified is http://netcdn.tw/app/431946152/hacked-roblox-accounts-list-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to exploit vulnerabilities or trick users into navigating to malicious sites, likely as part of a phishing or malware distribution campaign.

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.tw/app/431946152/hacked-roblox-accounts-list-game-hack In PDF document text
    • https://www.man2samarinda.com/__statics/gudangsoal/files/roblox-jailbreak-money-hack-2021-download_GM431946152.pdfIn PDF document text
    • https://man2samarinda.com/__statics/gudangsoal/files/free-coins-and-spins-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.man2samarinda.com/__statics/gudangsoal/files/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • https://man2samarinda.com/__statics/gudangsoal/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://man2samarinda.com/__statics/gudangsoal/files/free-robux-games-in-2021_GM431946152.pdfIn PDF document text
    • https://www.man2samarinda.com/__statics/gudangsoal/files/how-get-free-robux-no-scam-no-survey_GM431946152.pdfIn PDF document text
    • https://man2samarinda.com/__statics/gudangsoal/files/play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://www.man2samarinda.com/__statics/gudangsoal/files/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • https://www.man2samarinda.com/__statics/gudangsoal/files/how-to-get-minecraft-on-chromebook-for-free_GM479516143.pdfIn PDF document text
    • https://man2samarinda.com/__statics/gudangsoal/files/how-can-you-get-robux_GM431946152.pdfIn PDF document text
    • https://www.man2samarinda.com/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • https://man2samarinda.com/__statics/gudangsoal/files/hack-crack-for-coin-master-currency_GM406889139.pdfIn PDF document text
    • https://man2samarinda.com/__statics/gudangsoal/files/stickmasterluke-free-robux-game-link_GM431946152.pdfIn PDF document text
    • https://www.man2samarinda.com/__statics/gudangsoal/files/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • https://man2samarinda.com/__statics/gudangsoal/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • https://man2samarinda.com/__statics/gudangsoal/files/public-enemy-sun-prairie-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.man2samarinda.com/__statics/gudangsoal/files/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • https://www.man2samarinda.com/__statics/gudangsoal/files/roblox-g_GM431946152.pdfIn PDF document text
    • https://man2samarinda.com/__statics/gudangsoal/files/free-tiktok-likes-and-followers_GM835599320.pdfIn PDF document text
    • https://www.man2samarinda.com/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-your-phone_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
font_00_sfnt_off00003538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3538 22020 bytes
SHA-256: 6db51bbe098df7d15b05569274c3df9cfba7bb3417ed04a1522789d3f2017f38
font_01_sfnt_off000065e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65E9 19196 bytes
SHA-256: 381610bbab0b7b31e380a7a4918c50b3e30c1fbe9436aeae15edec1864da4a24

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