Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb182892bd98b23d…

MALICIOUS

PDF

35.7 KB Created: 2021-06-27 22:15:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 335c5d4b5ad81394126beae46b009381 SHA-1: b45dc326513ffa1592a5c100a29248a719268c77 SHA-256: fb182892bd98b23dff5bee2e1df76131aae5fa5b0c676c6ac08969ac1258c604
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a malicious redirector at http://netcdn.co/app/431946152/how-to-hack-someones-account-on-roblox-2021-game-hack, which is designed to lure users into clicking on promises of game hacks. The document's content and embedded URLs strongly suggest a phishing or scam attempt to redirect users to potentially malicious sites. No scripts were extracted, but the presence of malicious links and the ML classifier output indicate a high likelihood of malicious intent.

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-someones-account-on-roblox-2021-game-hack In PDF document text
    • http://pustaka.ust.ac.id/repository/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-cheats-for-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/bypass-chat-hack-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-account-hacker-tool_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/comment-avoir-des-truce-free-sur-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/minecraft-story-mode-free-download_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-robux-generator-http-freerobuxgenerator-xyz_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-unlimited-spins-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-hack-apk-link_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-short-hair-for-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/get-free-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-hack-tool-no-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-hack-on-laptop-july-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/jailbreak-roblox-money-hacks_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-100-spin_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_off00003309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3309 22212 bytes
SHA-256: 4cb0dff2f5fcb94c974c102ba171cc0cc59bdf3a1a95ea3b73102443791d88c3
font_01_sfnt_off0000642e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x642E 19724 bytes
SHA-256: 30d5ab7b69c217e69e2424e624c86b5c1ead161ce91e9b2fb03dbbfb23154c24

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