Malicious PDF — malware analysis report

Static analysis result for SHA-256 405edbbd6e1350f6…

MALICIOUS

PDF

32.3 KB Authoring application: LibreOffice Draw
MD5: 9c6f72576dc950d1c23e5e86c68f08e1 SHA-1: 940d9be290b18898cab6b172524318f76c842129 SHA-256: 405edbbd6e1350f614bf8cb57fb2c3e8b0f5d24be70b45eece61993db953bfb4
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 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, aligning with the PDF_SEO_LINK_FARM heuristic.

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://bfmix.com/uploads/1/3/0/4/130435590/womudamikikin.pdf
    • http://philanthropy.se/uploads/1/3/0/6/130604350/voxelit.pdf
    • http://pharmacistbritt.com/uploads/1/3/0/6/130639348/9951093.pdf
    • http://maisonskincare.com/uploads/1/3/0/6/130640003/ba602c57.pdf
    • http://michaelmaguire.com.au/uploads/1/3/0/2/130270779/109ba05d73c3.pdf
    • http://nofbx.net/uploads/1/3/0/6/130639233/lerotedivulez.pdf
    • http://psychologyflow.com/uploads/1/3/0/6/130639636/xojodubinafimosavax.pdf
    • http://rocknreelcc.com/uploads/1/3/0/5/130550873/f4d2086aa08.pdf
    • http://cathyblumcounseling.com/uploads/1/3/0/2/130270917/nafitibamojojojegopa.pdf
    • http://piconsultations.com/uploads/1/3/0/5/130590339/wenevunaw_nesadu_dovezuf.pdf
    • http://a1679303xstreamtravel.xsideas.com/uploads/1/3/0/8/130874002/130874002.html#biology+postdoc+cover+letter

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000029ae.bin
40a00fcc33687990f5d956e98fd755fb2e2533c3e4c584ec07414def0973434f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x29AE 7352 bytes

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