Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd52428663052883…

MALICIOUS

PDF

36.0 KB Authoring application: OpenOffice.org
MD5: 9924e73f7bae526f210fe4f248db9cba SHA-1: 8308ada769277f502388d99f1f3fed5ea5ed9bae SHA-256: dd52428663052883282b7f91764db839d2a82a99ccf4aebd6b04a63e83c4c794
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of external links to other PDF files, disguised as an occupation list for a visa application. This technique is commonly used to distribute malware or phishing content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to traffic redirection or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://worldarchives.club/uploads/1/3/0/6/130620607/zikevipu.pdf
    • http://lamplepost.com/uploads/1/3/0/3/130380037/juwoni.pdf
    • http://globalgraphicdesigns.com/uploads/1/3/0/4/130483623/3893835.pdf
    • http://newageoflight.com/uploads/1/3/0/6/130639452/539126.pdf
    • http://indieban.com/uploads/2020/01/28/6fe2b7b19.pdf
    • http://iweargreatness.com/uploads/1/3/0/6/130639801/130639801.html#491+visa+occupation+list+victoria

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001037.bin
d1aded19f0a095a0f0987edba40f7296920f29b43e9a2f72988c1fb49529f9b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1037 7832 bytes

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