Malicious PDF — malware analysis report

Static analysis result for SHA-256 d74db8c69c86ed90…

MALICIOUS

PDF

37.4 KB Created: 2021-07-04 01:52:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 9f75754787fc787ae45ec8f430b5cb75 SHA-1: 5b52b8225277b82f2ea296483dfc6c1f5054b0a5 SHA-256: d74db8c69c86ed90022ac9a6b823400f547b67485c289e555df2f60ddb3941b6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'free generators' for popular games. The primary redirector URL is http://netcdn.tw/app/406889139/coin-master-daily-free-spins-link-today-blogspot-game-hack. This indicates a social engineering lure designed to trick users into visiting potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a malicious intent to redirect users to malicious or phishing content.

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/406889139/coin-master-daily-free-spins-link-today-blogspot-game-hack In PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-robux-place_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/mcpe-master-unlimited-coins-hack-apk_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/coin-master-free-spin-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/roblox-hack-android_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/coin-master-hack-here_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-100-robux-code_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-roblox-collectables_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/robux-hack-tools_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/coin-master-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/roblox-script-hack-get-everything_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/how-to-hack-roblox-accounts-to-get-robux-for-free_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_off000038ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x38ED 23144 bytes
SHA-256: b22912c810a63ad982bb653ae8eb8df9cd518174cefadd4ecad96c2f985e7506
font_01_sfnt_off00006ce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE5 19156 bytes
SHA-256: 09b1cdc1283068c485bfced7c85533ce23b9c20e7767d1eac4088bba3ec2de37

Open this report in the interactive analyzer, or submit your own file for analysis.