Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d4739daf1444a25…

MALICIOUS

PDF

36.2 KB Authoring application: LibreOffice
MD5: 75f1339487b5761cb6389c8b916ca1bc SHA-1: 6e51361e48cabbdfb48babcf577d3c4d246f1a85 SHA-256: 6d4739daf1444a2541334217f1c36197fbc1197fa3720ea0fbf4e79a6f9d463d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a mass external link farm pointing to numerous PDF files hosted on unrelated domains. This technique is often used to distribute phishing content or redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

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://cloakanddaggerdc.com/uploads/1/3/0/6/130621441/zakebogivofotonap.pdf
    • http://zulebolanu.idealno5.ru/uploads/2020/01/27/909d90bc41f4d4.pdf
    • http://rimuja.jornalistavitogemaque.com/uploads/2020/01/29/togiziroj.pdf
    • http://animaleyeconsultantsd.com/uploads/1/3/0/3/130379272/loteje_zefivavij_xamiv_nunumodelowav.pdf
    • http://3dsprint.net/uploads/1/3/0/2/130272579/kaloxemogixu.pdf
    • http://bygollycandlesnmore.com/uploads/1/3/0/8/130813834/ba020123dc9.pdf
    • http://piecedtogether.org/uploads/1/3/0/5/130590215/5769dc885ccd3f.pdf
    • http://riversidecountyhistory.org/uploads/1/3/0/7/130740062/130740062.html#ielts+graph+writing+band+9

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011aa.bin
e4952eda9f89be59aa46c2125de69cc428d8948ffa39b802b822a8407e8b9a3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA 8260 bytes

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