Malicious PDF — malware analysis report

Static analysis result for SHA-256 747c3588691a914a…

MALICIOUS

PDF

60.8 KB Authoring application: Solid Converter PDF
MD5: ce90195e28fcc3e261934f8bdb08f173 SHA-1: 28d66281c7f887512073838baffd976c991706df SHA-256: 747c3588691a914a332f24ad420038deb197268947385a8939e04cec3ddbc862
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded URLs pointing to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

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://7sevensteps.com/uploads/1/3/0/5/130589345/votukupofumujal_moxipatejep_donowexamofot.pdf
    • http://accomplishdreams.net/uploads/1/3/0/2/130272587/fakikinexisaka.pdf
    • http://mosex.net/uploads/1/3/0/4/130488270/06558cf2a655ff.pdf
    • https://fomakumu.weebly.com/uploads/1/3/0/2/130289265/3306283.pdf
    • http://mltech.com.au/uploads/1/3/0/2/130271011/c36b1.pdf
    • http://buyeveryinglobal.com/uploads/1/3/0/4/130435619/6b8dca.pdf
    • http://ashleynboyd.com/uploads/1/3/0/5/130588621/pujuxesixivel_pimutemawiva_biwaviso.pdf
    • http://mediaprojethaiti.org/uploads/2020/01/29/2422485.pdf
    • http://lochindpro.com/uploads/1/3/0/4/130435690/kaxosot_luwesaxogud.pdf
    • http://bimplicity.net/uploads/1/3/0/6/130621864/pegamejer.pdf
    • http://edgelandscapeandmaintenance.com/uploads/1/3/0/4/130488914/130488914.html#what+is+homogeneous+and+heterogeneous+catalysts
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000013a6.bin
ed3c706c55047e93b16c5bf1df8329128fc1ad1c56c1dc0661a2bf54b00938dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A6 9672 bytes
font_01_sfnt_off0000b3a7.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3A7 2652 bytes

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