Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f1cf5f8ab1b8d07…

MALICIOUS

PDF

38.1 KB Authoring application: LibreOffice Draw
MD5: 4cc28b358429c5df3a90d1a2b9c2d626 SHA-1: e2a8a061779771b95ae83df61e42ca842ef582e1 SHA-256: 0f1cf5f8ab1b8d07a385c2d6bd617f88c84c1561c9eb5159a97a088fd93942ae
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or a distribution mechanism for further malicious content. The ML_NYX_PDF_MALICIOUS and ClamAV detections confirm the malicious nature of the file.

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://nationalpostcards.ie/uploads/1/3/0/7/130738955/fikukilavale.pdf
    • http://reneeleaberger.com/uploads/1/3/0/6/130604136/7cf59ca5fef.pdf
    • http://onestepforwardinspirations.com/uploads/1/3/0/3/130323113/siked.pdf
    • http://northfieldpro.com/uploads/1/3/0/3/130379083/nuboxedezugoga.pdf
    • http://radonchamber.com/uploads/1/3/0/6/130603980/sawizilozinerejimip.pdf
    • http://reyvu.com/uploads/1/3/0/4/130490915/mibasiw.pdf
    • http://kobasfourpawsinstitute.com/uploads/1/3/0/6/130604516/2cfb63.pdf
    • https://nupogadelo.weebly.com/uploads/1/3/0/4/130476317/2995902.pdf
    • http://racefkc.com/uploads/1/3/0/2/130291352/5e9a96ee29fa.pdf
    • http://advance-it.net/uploads/1/3/0/5/130548070/130548070.html#reading+comprehension+for+grade+4+worksheet

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011fd.bin
a47a31d008d4062cc43571e5eff5948ffdc72fd9ad93a5244c449c05eecbb6ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD 8344 bytes

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