Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd7b7d1611a95c5a…

MALICIOUS

PDF

36.0 KB Authoring application: Soda PDF
MD5: df06a8494a101c296573a03517cf6481 SHA-1: d42790359aafaf8b1f4833cf80f740735ad886b5 SHA-256: fd7b7d1611a95c5a98bed8280e1604ccadaf0c787b0ceac0acf1831680604a77
150 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0 and the ML classifier output further support its malicious nature. The embedded URLs are likely used to redirect users to phishing sites or download further malware. 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://gosuslugi-moskva.ru/uploads/2020/01/29/sagurovodapilaga.pdf
    • http://tackletote.com/uploads/1/3/0/6/130621190/8920439.pdf
    • http://mydigitaldiva.net/uploads/1/3/0/4/130477003/nagegoxuxipipatuvil.pdf
    • http://fikosaba.lioele.ru/uploads/2020/01/29/b5663f6cf.pdf
    • http://ahacia.com/uploads/1/3/0/2/130270869/rukuvemo_womavibenud_kelegitinawamow.pdf
    • http://accuplus-parkour.com/uploads/1/3/0/3/130379681/xopedeluribevup.pdf
    • http://balance-buddies.com/uploads/1/3/0/7/130740298/130740298.html#train+to+busan+online+latino

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001186.bin
42a91eafc1c4e622b93242151ca398893ee4a8243bb118b172592adf07bcd57a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1186 9408 bytes

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