Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb8441db2ad510f1…

MALICIOUS

PDF

34.8 KB Created: 2021-06-18 21:56:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d18092605e9aa38fb55df1fe583546fa SHA-1: a6bafa68abf65378b0f774d22e25fbf50c2f6d75 SHA-256: eb8441db2ad510f1d7482b21577822c801be8c9f4b6cd390a98829ecf0a99e13
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one pointing to known malicious redirector infrastructure at http://netcdn.co/app/431946152/free-roblox-doumnis-game-hack. The document body and heuristics indicate a lure for free game items or currency, designed to trick users into clicking the malicious link. No scripts were extracted, but the presence of malicious redirectors and the lure suggest a phishing or scam attempt.

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/free-roblox-doumnis-game-hack In PDF document text
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/roblox-com-robux_GM431946152.pdfIn PDF document text
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/coin-master-gift-link_GM406889139.pdfIn PDF document text
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/roblox-cheat-engine-table-and-bypass_GM431946152.pdfIn PDF document text
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/update-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/robuxglobalcom_GM431946152.pdfIn PDF document text
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/how-to-get-free-skins-in-roblox_GM431946152.pdfIn PDF document text
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/code-free-robux_GM431946152.pdfIn PDF document text
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/free-spin-and-win-coin-master_GM406889139.pdfIn PDF document text
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/easy-way-to-get-robux_GM431946152.pdfIn PDF document text
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/coin-master-daily-free-coins-link_GM406889139.pdfIn PDF document text
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/robloxfun-com-robux_GM431946152.pdfIn PDF document text
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/minecraft-pe-free-download-ios_GM479516143.pdfIn PDF document text
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://stain-madina.ac.id/assets/ckfinder/userfiles/files/roblox-hack-unlimited-robux_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_off0000306d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x306D 22288 bytes
SHA-256: 5f49b4a4d87d4323f839e09a0fea88b31cda2aa62762688e27db7cbf6e6cfef8
font_01_sfnt_off0000622d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x622D 19340 bytes
SHA-256: 5452bc479a4b28eb0ae8b5f6c3d331d335be7246fbfb2f15bbd08ad02c057206

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