Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9fa98274564c3b0…

MALICIOUS

PDF

42.8 KB Authoring application: Soda PDF
MD5: 50b70bf4ba47bc1f3b7c608a9a3bd099 SHA-1: 91607945a3344a7b37914858b431abbb81c55f89 SHA-256: f9fa98274564c3b0cc92c649ef8c5b7cfff51eb25fbcbf206f9c62168319815c
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external websites, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, suggests a lure related to a 'letter of recommendation for nursing graduate school'. The ClamAV detection further confirms its malicious nature, specifically flagging it as phishing-related. The embedded URLs are likely used to redirect the user to malicious content or phishing pages.

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://ozervisioncare.net/uploads/1/3/0/6/130639803/wivez_lazufeketasepe_jiwijoneto.pdf
    • http://dewebo.comtrans.info/uploads/2020/01/27/rupuxojovexo.pdf
    • http://pusebi.maslooil.ru/uploads/2020/01/28/bumudasubolobaru.pdf
    • http://divinewillschool.com/uploads/1/3/0/2/130287960/bexakitop.pdf
    • http://danthropology.com/uploads/1/3/0/5/130539366/vebeziz_vupotoneriwosun_wumumigut.pdf
    • http://stokesed508webpage.com/uploads/1/3/0/4/130490451/130490451.html#letter+of+recommendation+for+nursing+graduate+school+example

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000112c.bin
c820f439b421e538a5b93a3b97ed4f5daf9fdc6cecb1d92a46519a74b0135e5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112C 8476 bytes

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