Malicious PDF — malware analysis report

Static analysis result for SHA-256 483b0ef038765df9…

MALICIOUS

PDF

48.0 KB Authoring application: pstoedit
MD5: 1c54d8d4536e23b594feceb073696555 SHA-1: 009b44015fb435a29aa94125a392313c40c54377 SHA-256: 483b0ef038765df965f08cbff56cc475ec876bf5fe0d762673d5d40e558c6f9b
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links to external PDF documents hosted on various domains. This behavior is indicative of a link farm or SEO-based phishing campaign, designed to drive traffic to potentially malicious content. The ClamAV detection and ML classifier strongly support its malicious nature.

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://naftakw.com/uploads/1/3/0/4/130489361/947357.pdf
    • http://deltachipurdue.com/uploads/1/3/0/2/130289278/3628010.pdf
    • http://ohioawnings.com/uploads/1/3/0/4/130489706/36c36655e98e3.pdf
    • http://jerutazaz.g-gladiolus.ru/uploads/2020/01/29/pozesawovuwofen-logodenar-putopelapugadir.pdf
    • http://yessicacurielmontoya.com/uploads/1/3/0/4/130484005/2888178.pdf
    • http://newdaymetaphysical.com/uploads/1/3/0/5/130588492/gowirafilusopuf.pdf
    • http://drstellamedicalintuitive.com/uploads/1/3/0/3/130379482/1b436fcf880.pdf
    • http://tournoidevignoles.com/uploads/1/3/0/6/130604935/f7cf0e.pdf
    • http://101bamboofins.com/uploads/1/3/0/5/130545333/6590328a70413f8.pdf
    • http://a113n.net/uploads/1/3/0/6/130621552/a09b7e75b35dfdc.pdf
    • http://arcadiagardensllclandscapinganddesign.com/uploads/1/3/0/2/130271167/130271167.html#alat+pencetak+bakso+manual

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000121c.bin
70085e92e5f08380d3686844b5a598969b632827461103f977b52582f5128e28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x121C 8300 bytes
font_01_sfnt_off00007311.bin
598b436daaf3d122157f8aae4d95cb5f98998d7541b527c84c982bd0659a624f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7311 16888 bytes

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