Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eb377738f4ddb02…

MALICIOUS

PDF

35.1 KB Created: 2021-07-20 02:16:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 07b26771a8eddc7119fe63d637dbc1b9 SHA-1: 6b5d94c736403091d4c196637a4384c385e28d31 SHA-256: 4eb377738f4ddb0233365bf823a47c7daab4ea5be77103fa9893c4dd5b3b767c
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links and a visual download button, directing users to potentially malicious URLs. The ML classifier also flagged this PDF as malicious. The primary malicious URL identified is http://netcdn.tw/app/479516143/minecraft-apk-download-v1-14.4-2-free-game-hack, which is associated with redirector infrastructure. The document body and embedded links suggest a lure for downloading an application, likely malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9962

Heuristics 3

  • 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/479516143/minecraft-apk-download-v1-14.4-2-free-game-hack In PDF document text
    • http://auto-mankel.de/images/free-tiktok-fans-and-likes_GM835599320.pdfIn PDF document text
    • http://auto-mankel.de/images/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://auto-mankel.de/images/free-disney-plus-accounts-tiktok_GM835599320.pdfIn PDF document text
    • http://auto-mankel.de/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://auto-mankel.de/images/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://auto-mankel.de/images/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • http://auto-mankel.de/images/how-to-get-tiktok-famous-free_GM835599320.pdfIn PDF document text
    • http://auto-mankel.de/images/free-robux-games_GM431946152.pdfIn PDF document text
    • http://auto-mankel.de/images/free-robux-working_GM431946152.pdfIn PDF document text
    • http://auto-mankel.de/images/free-24-7-minecraft-server_GM479516143.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_off00003171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3171 22800 bytes
SHA-256: d54ff356857707e32a935156d201c3210959b0b59e9806bce80542b601fc34b0
font_01_sfnt_off00006497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6497 19128 bytes
SHA-256: 93ea6bd85251d95bb8fdb3e1515e0b836a385cc2448c0aeb3adc981293f46b66

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