Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec8a41570967fdc7…

MALICIOUS

PDF

35.6 KB Authoring application: LibreOffice
MD5: cfb4dfd00d9183944c34b2cc1df9061d SHA-1: 3f1a8cf9212a7c4aec577ff548e8a4c2b9a71f71 SHA-256: ec8a41570967fdc757f0f0242c4d219368ec2a53b22cc6378524e3164ce96a5e
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF documents, a technique often used for SEO manipulation or to distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://boylepublichealth.com/uploads/1/3/0/7/130739549/b17ce8fed3ac8.pdf
    • http://ahstigerband.org/uploads/1/3/0/5/130590779/jevaturupe.pdf
    • http://dogfriendlyrentalsonsanibel.com/uploads/1/3/0/6/130621383/nujipofon-kivuwolu-bazis.pdf
    • http://nickjanelandscape.com/uploads/1/3/0/6/130622104/7f6554f0b0f904.pdf
    • http://studio10saloncolorspa.com/uploads/1/3/0/6/130604231/3719686.pdf
    • http://cubcountry.org/uploads/1/3/0/2/130289305/zafabavoxekedadigeje.pdf
    • http://cfirthwssu.com/uploads/1/3/0/6/130639682/4975ee1459c67.pdf
    • http://moonlightairfoundation.org/uploads/1/3/0/5/130550887/efc1221c4e1a60d.pdf
    • http://nisixasevo.constellars.com/uploads/2020/01/28/zovujafitet-nudunisulitur.pdf
    • http://bsa-sccc-pack301.com/uploads/1/3/0/6/130620898/130620898.html#jon+jones+alexander+gustafsson+full

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001296.bin
5e59cd5730d3597d614eae4bd0a5f76fc0680c87d9eddb70ec967bb4c8cdb338		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1296 8456 bytes

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