Malicious PDF — malware analysis report

Static analysis result for SHA-256 99abf21d5f9fad0b…

MALICIOUS

PDF

37.2 KB Authoring application: OpenOffice Draw
MD5: 3f51d9149d5211f05f6cd7eab79d51a8 SHA-1: 26ed53813524479c8505a37cbfcc93a5147ad1e4 SHA-256: 99abf21d5f9fad0b58e34fdcfd8b1e1a799f5ffde1dccfe622b2cad1d3313344
120 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a PDF link farm, designed to redirect users to other PDF documents. The document body, though partially obfuscated, mentions 'Autocad mep 2020 new features' as a lure. The ClamAV detection 'Pdf.Dropper.Agent-7689083-0' further confirms its malicious nature as a dropper. The primary attack pattern involves social engineering to trick users into downloading further malicious content.

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-7689083-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7689083-0
  • 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://kingamores.com/uploads/1/3/0/6/130605388/6b7a3bf79d7e3.pdf
    • http://nealcm.com/uploads/1/3/0/6/130640042/xufuku.pdf
    • http://wazalas.rostelekomrt.ru/uploads/2020/01/28/bc0021759218.pdf
    • http://dirtkingsrc.com/uploads/1/3/0/6/130620662/lerubopapowi_wutob.pdf
    • http://artsequences.com/uploads/1/3/0/2/130288394/2c3bf9a52ddee7c.pdf
    • http://audiostart46.icu/uploads/2020/01/28/2674173.pdf
    • http://attorneyspacesharing.com/uploads/1/3/0/5/130551597/130551597.html#autocad+mep+2020+new+features

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010f5.bin
0a2bfffb0eaa3b642b83b105b7306332098ee89b0531a154186aae893b9b787f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F5 8732 bytes

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