Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f786387b2e88425…

MALICIOUS

PDF

35.1 KB Created: 2021-06-19 17:01:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3774c251cbc9619cc8fa6b3a12e852d8 SHA-1: 290caf01ad137d3ee6a071d223c4560119012e6d SHA-256: 9f786387b2e88425b115d771da98daaadbf8186213026bdedd06193b0da3a2c7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, disguised as generators for game currency or hacks. The document body explicitly mentions 'Youtube-robux Hacks 2021' and includes the malicious URL, indicating a lure to trick users into visiting a potentially harmful site. The ML classifier also flagged this PDF with high confidence.

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/youtube-robux-hacks-2021-game-hack In PDF document text
    • http://library.atim.ac.id/repository/how-to-get-free-skins-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-free-robux-with-cheat-engine-66-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-roblox-http-catchsatoshionline-robuxrobloxg_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-hack-admin-on-roblox-without-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-links-for-free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-views-on-tiktok_GM835599320.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/robloxhackbalance_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-hack-mod-apk-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-fire_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-cheats-how-to-get-free-obc_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-hack-version-download-ios_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/f3x-hacking-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-coins-spins-on-coin-master_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
font_00_sfnt_off00003094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3094 22524 bytes
SHA-256: 9532fa920f82725c693d071b1f198ba8f5ef673bb85d1ba6326d5b1595dbd59f
font_01_sfnt_off0000629a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x629A 19424 bytes
SHA-256: 37a69999150194230be141a56c8e564fff60377571747cd829105300e5dad9b7

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