Malicious PDF — malware analysis report

Static analysis result for SHA-256 4daf3ae282e1bc19…

MALICIOUS

PDF

39.9 KB Created: 2021-05-22 00:38:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 33f43569411025fdcf88bfed9ba6c7e5 SHA-1: e9f2b997de773360a4027c830e03e23276af481a SHA-256: 4daf3ae282e1bc19758e3087bbc0e016a4b14bbf4b4d520c9f197583aead8cbe
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a malicious redirector link that leads to a download URL for what appears to be a Minecraft APK. The presence of a visual download button and the ML classifier flagging the document further support its malicious nature. The document body contains obfuscated text and multiple URLs, suggesting an attempt to disguise the malicious payload and redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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 https://netcdn.xyz/app/479516143/minecraft-apk-download-v1-14.4-2-free-game-hack In PDF document text
    • http://riccardodurso.it/images/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://riccardodurso.it/images/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://riccardodurso.it/images/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://riccardodurso.it/images/coin-master-free-spins-instagram_GM406889139.pdfIn PDF document text
    • http://riccardodurso.it/images/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000035c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35C2 24832 bytes
SHA-256: 9af03e288b964f02ab49de7a07dd59a58191b77cba2675612f53dae258035a8d
font_01_sfnt_off00006e37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E37 2820 bytes
SHA-256: 972979c3a46100cf5f8fd289bc6fbd2496ff75fec0e3f6753648c72ec6eba714
font_02_sfnt_off000077d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77D6 19128 bytes
SHA-256: 93ea6bd85251d95bb8fdb3e1515e0b836a385cc2448c0aeb3adc981293f46b66

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