Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ea8ea02b97f261d…

MALICIOUS

PDF

46.4 KB Authoring application: LibreOffice
MD5: 5171b10aa41132cef5ac3cfa3e073c52 SHA-1: 1b5781a0c6015395352ca34639827226fd2cf627 SHA-256: 5ea8ea02b97f261d378abfcd9ea1b004c46fe8538c0cce6b143533537ad1a1dd
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. This suggests a tactic to manipulate search engine results or to distribute additional malicious content. The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted, and the document body was unreadable, but the link farm is a clear indicator of malicious intent.

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://popsinc.net/uploads/1/3/0/5/130590200/14fbbee6407a4.pdf
    • http://www.413115825.rkfischer.com/uploads/1/3/0/4/130489914/ruxito-magoredokiri.pdf
    • http://mirandasanderson.com.au/uploads/1/3/0/6/130639526/vawapubutunones_samonitepuw.pdf
    • http://mta-sts.somaticunwinding.com/uploads/1/3/0/8/130814586/f61a7e0a234.pdf
    • http://blackbeardmarketing.com/uploads/1/3/0/7/130738831/9f6d4.pdf
    • http://mndball.com/uploads/1/3/0/3/130313333/fukipukudutibi.pdf
    • http://sustainablespringfield.net/uploads/1/3/0/7/130776648/lopurapizu.pdf
    • http://meddin.space/uploads/1/3/0/6/130605164/tidiz-xefakagevonep.pdf
    • http://mosquitoprevention.org/uploads/1/3/0/8/130814288/zusimumaraba.pdf
    • http://joppainsurance.com/uploads/1/3/0/6/130621441/lalilabeg-fubob.pdf
    • http://longwoodhomesforsale.net/uploads/1/3/0/6/130621383/3b20f.pdf
    • http://www.neabtransports.com/uploads/1/3/0/6/130620278/351ee62c.pdf
    • http://almoradesigns.com/uploads/1/3/0/7/130775497/a22875.pdf
    • http://rebeccalaplacaattia.com/uploads/1/3/0/6/130639916/130639916.html#ampere%27s+circuital+law+derivation+class+12
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003693.bin
287b852d1c1b0334c7d2ab49fe8ac8ac5488f6edefc3e00d5eee83c7048b9cc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3693 16088 bytes
font_01_sfnt_off00004b11.bin
381ed0b1e435db07581e4f4f8d9c47a497f06df99efd41744e82f18cab21c51d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B11 3164 bytes
font_02_sfnt_off0000591d.bin
f283d1b05b7250ab4b2494a740141b321f5ea95989b91eb1264b07b946171a00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x591D 9036 bytes

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