Malicious PDF — malware analysis report

Static analysis result for SHA-256 7930a66a0d212144…

MALICIOUS

PDF

42.2 KB Authoring application: OpenOffice.org
MD5: 030b4e605a2335c26c3be19e7a69522e SHA-1: 7d59142685400172988506a26ce51657ea5654c7 SHA-256: 7930a66a0d212144aec01f62f76189577b5652c867651e1e607304709749789b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links pointing to external PDF files hosted on unrelated domains. This behavior is indicative of a link farm or a phishing campaign designed to redirect users to malicious content. The ClamAV detection and ML classifier further support the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://twinatron.com/uploads/1/3/0/2/130287299/fokaxagireno-ninege-lasemoj-belokeg.pdf
    • http://rocathletes.com/uploads/1/3/0/5/130543364/goropobomuxomex.pdf
    • http://rinamo.aavit.pro/uploads/2020/01/29/jaxalezutubeletaw.pdf
    • http://michaudwellness.com/uploads/1/3/0/5/130589014/130589014.html#achondroplasia+oral+symptoms

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000100a.bin
0c9b8533d05bbc8d641a77d496ea9ae0cf731e130ee92c45df5e52a1d17020e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100A 8568 bytes

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