Malicious PDF — malware analysis report

Static analysis result for SHA-256 36779d8a4aa2ca6a…

MALICIOUS

PDF

91.4 KB Authoring application: Haru Free PDF Library 2.4.0dev
MD5: 7b16071936c58420c62b8fc338c9cf30 SHA-1: 7b7707e6858099681636199c63b762d0f2aeece8 SHA-256: 36779d8a4aa2ca6af25ba9a98aabbb3ca7999071d1e5b0024b41df4f438d311f
60 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF file is identified as an image-only lure, typical for phishing attacks. It contains a clickable URL that is obfuscated using PDF string escapes. The URL 'http://xephankhoilon.vn/wp-content/themes/tiny/fonts/0yfcj/' is likely intended to lead the user to a malicious site for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier clean score 0.0689

Heuristics 2

  • Image-heavy PDF hides clickable URL with PDF string escapes high PDF_ESCAPED_URI_IMAGE_LURE
    PDF is image-heavy with little real text and its clickable HTTP(S) URI is encoded with PDF octal escapes. This combination is common in credential-phishing PDFs that render a screenshot-like prompt and obscure the destination from simple URL extractors.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 2 image(s), only 0 text block(s), carries a click-outward action, and is only 91 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000daea.bin
5c643a10ed07ee166cae686ce01c4408e2e3717a17023dfb80638b3379ab4dd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAEA 91955 bytes

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