Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c72f907c6fa387b…

MALICIOUS

PDF

40.7 KB Authoring application: Scribus
MD5: a1c43f344eaef210672605bd0e712930 SHA-1: 69e2e77dada486b6c686126f830f4e818b6748bd SHA-256: 4c72f907c6fa387bff6bc1365e1f044eb608d0fcd6fbad26e05908504c595295
150 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.TtraffRobotInstall-7605656-0 and a machine learning classifier. The primary indicator of maliciousness is the presence of a large link farm within the document, pointing to numerous external PDF files hosted on various domains. This technique is commonly used for phishing or to redirect users to sites that host further malicious content.

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://pastandpresentmedia.com/uploads/1/3/0/4/130476523/fakelugowinalagenog.pdf
    • http://mypricelesspetals.com/uploads/1/3/0/5/130590200/mexulirapawu.pdf
    • http://ninapouesi.com/uploads/1/3/0/6/130603773/d635fc0a9f0870.pdf
    • http://shop.rbalternatives.com/uploads/1/3/0/6/130639085/3461037.pdf
    • http://wojimbo.com/uploads/1/3/0/5/130589140/ddc1d86.pdf
    • http://theneoneffect.com.au/uploads/1/3/0/6/130620407/popinogal.pdf
    • http://mydivinewomb.com/uploads/1/3/0/4/130436458/zisum.pdf
    • http://amgreal.com/uploads/1/3/0/6/130604934/1872014.pdf
    • http://nozadoni.starcrane.ru/uploads/2020/01/29/domaximetobu.pdf
    • http://ribuxijofa.gruzavi.ru/uploads/2020/01/29/9711006.pdf
    • http://arcadiagardensllclandscapinganddesign.com/uploads/1/3/0/2/130288637/130288637.html#ark+survival+evolved+vr+vive

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000123d.bin
d0b03135663b3867bb68cfb609be01b5eff78a809a70ef7ac849599e58848610		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123D 8736 bytes

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