Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae331162e72b129c…

MALICIOUS

PDF

35.9 KB Authoring application: pdf-parser
MD5: 9bbe7c39577d3b7c843953942c3623c7 SHA-1: 5dcfbd6249c8ba9b93e36b812ca07177c72fb90e SHA-256: ae331162e72b129c1cd010caf83264d1edb80721a1ca46971cfa844b177aa047
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by multiple heuristics, including a critical rule for a link farm and a machine learning classifier. The embedded content reveals a large number of URLs pointing to external PDF files, indicating a likely attempt to redirect users to malicious content. The ClamAV detection as 'Pdf.Dropper.Agent-7770417-0' further supports its malicious nature.

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.Dropper.Agent-7770417-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7770417-0
  • 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://courtenaydore.com/uploads/1/3/0/6/130604860/f752d.pdf
    • http://omarlattouf.com/uploads/1/3/0/5/130543369/mizawoxeziwidoragi.pdf
    • http://ked.iholpworld.com/uploads/2020/01/28/rujazubawepi-pijitubi-dekobab-wesevobe.pdf
    • http://bestyethomeimprovement.com/uploads/1/3/0/4/130483469/8811271.pdf
    • http://motors-auto.com/uploads/1/3/0/4/130483290/taboviwabife_wakanuj.pdf
    • http://brasecollection.com.au/uploads/1/3/0/6/130603704/nopubuguka.pdf
    • http://beanstockbrand.com/uploads/1/3/0/3/130324451/jogul-fekanixuv.pdf
    • http://raf.pay-pass.club/uploads/2020/01/27/2563398.pdf
    • http://nora.yukariyorum.org/uploads/2020/01/27/5f4f426fb18f.pdf
    • http://marycoeprintmaker.com/uploads/1/3/0/4/130476506/6428976.pdf
    • http://nwrenewable.com/uploads/1/3/0/4/130488085/130488085.html#pdf+file+format+documentation

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000013c1.bin
02d3f48f92d4cc039c4bd3546d22cef2b509fa074e03bf49458a2382a893ae79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C1 7784 bytes

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