Malicious PDF — malware analysis report

Static analysis result for SHA-256 a85fe94f10681e6b…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 17:41:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9eec6b270d4c2d3fa37c76a965768717 SHA-1: fd0cde46a1d1fca7c754dc8caef9b7b11bdf2a6c SHA-256: a85fe94f10681e6bb759080bc5ef77924ac5e6e4b8b8223c3f33f07559c9df75
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs, predominantly related to game cheats and hacks for platforms like Roblox. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of it being used for malicious purposes, such as distributing malware or leading users to phishing sites. The presence of a "download button" heuristic further supports the lure-based attack pattern.

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/free-roblox-mermaid-games-game-hack In PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-generator-robuxian_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-treasure-hunt-simulator-202120219-cheat_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-player-exe-free_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-get-any-item-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/hack-for-roblox-wont-get-banned_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-get-free-robux-in-roblox-inspect-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/nonsensediamond-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/scripts-for-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/1x1x1x1-roblox-id_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-ben-10-cheats_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/grief-hack-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-hack-apk-download-android_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-get-spins-for-free-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-bgs-cheats_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-speed-hack-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-hack-roblox-apk_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-level-7-roblox-executor_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-not-including-survey_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_off00002dd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DD3 22916 bytes
SHA-256: 1a1366027d6634d5600cc82f02746aa1aa008c134122f54fd53735c5e0ec4458
font_01_sfnt_off00006046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6046 19400 bytes
SHA-256: 9bd418245ac92d65c5b9a8a70fea0fd460fe0ebaf59b819e1b2da0ff293f79ec

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