Malicious PDF — malware analysis report

Static analysis result for SHA-256 32857de0a78c43fa…

MALICIOUS

PDF

80.8 KB Authoring application: Nitro PDF
MD5: b1adfc868cd9493ff4b8dedf341c75cb SHA-1: cc36263b43d005e4820115eac64c8274ceb06afb SHA-256: 32857de0a78c43fa229f9c6a09700d4def081e0b22f12e6fe885b78735c6ed30
150 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The critical heuristic firing for PDF_SEO_LINK_FARM reveals a large number of embedded external links, suggesting a link farm designed to redirect users to potentially harmful content. The document body contains many of these URLs, reinforcing the link farm attack pattern. No scripts were extracted from this sample.

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://vezirgroup.com/uploads/2020/01/27/viwujowulugozev.pdf
    • http://nzacres2019.nz/uploads/1/3/0/4/130435657/semokolutowibo_xawavagilodabo_vorenemevopevav_wijofadurox.pdf
    • http://engineeringthegoodlife.com/uploads/1/3/0/2/130270963/5205572.pdf
    • http://waterweeknorth.ca/uploads/1/3/0/6/130621625/kulemubomabonekavop.pdf
    • http://nedez.promokot.info/uploads/2020/01/28/080eb8.pdf
    • http://minnickmanagementhoa.com/uploads/1/3/0/3/130313366/rizinipe.pdf
    • http://thepilgrimageofhope.org/uploads/1/3/0/4/130483320/6196159.pdf
    • http://allaroundcontracting.net/uploads/1/3/0/4/130489914/af172695bf.pdf
    • http://mytravel.guide/uploads/1/3/0/5/130539336/risowifi-jowobo-sevekuxilito.pdf
    • http://abraxasband.net/uploads/1/3/0/6/130605077/9992015.pdf
    • http://morganhomesliving.com/uploads/1/3/0/6/130605397/rafusepefusix.pdf
    • http://snohomishdrivingrange.com/uploads/1/3/0/4/130483542/sosivumasuxa-bufefuwab-weledu-pefag.pdf
    • http://missionstartpodcast.com/uploads/1/3/0/6/130639062/27747.pdf
    • http://athletesunitedoregon.com/uploads/1/3/0/6/130620508/9963350.pdf
    • http://misssupremepurityqueen.com/uploads/1/3/0/5/130545581/130545581.html#a+monster+calls+pdf+script

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001668.bin
1db11491bbb5afcf6bc3db05adfc15cb62e991f447e940db3ba464200e940ebf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1668 9072 bytes

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