Malicious PDF — malware analysis report

Static analysis result for SHA-256 c81a244b35f60d23…

MALICIOUS

PDF

34.7 KB Created: 2021-05-30 01:31:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 62dfdb1c59dc102499d524f3d9fd8101 SHA-1: bad1d5139acb569c4e92bd0f8d655df1398a4117 SHA-256: c81a244b35f60d2358a9cfe986b30a2cab91e53970b4c1f629540d1adfcd5d80
70 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link that redirects to malicious infrastructure, masquerading as a download for a Minecraft hacked client. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the malicious nature of the embedded URL. The document body also contains text and links related to this lure, suggesting a social engineering attempt to trick the user into visiting a dangerous site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0718

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-hacked-client-1.12-2-game-hack In 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
stream_002_off00002e21.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E21 24716 bytes
SHA-256: 0a0acc6808f1279f495b3497b0395955de4b36d14d966dc07472d6c599bd7644
font_01_sfnt_off000066bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66BB 18280 bytes
SHA-256: 63e0cf813ec8bc820137db86bcb3617ef7dd45146c6ac783cccfa5d71b9aece7

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