Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c8a6edd2a27e0df…

MALICIOUS

PDF

47.8 KB Authoring application: PDFBox
MD5: 1155141e180422b18aa3ecef532d1827 SHA-1: c079b73d16d7ee284e253a3b6163f3c57a012edd SHA-256: 5c8a6edd2a27e0dfbd678edf61ea74bfb783c318811aa0dce861b1cfe97b563a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO spam or to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to leverage external resources for malicious purposes.

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://generationwhit.com/uploads/1/3/0/7/130739419/vozupadesupu-jufezigerujo-nojegufo.pdf
    • http://xubanire.mstudioland.ru/uploads/2020/01/28/0d54263fafd2d.pdf
    • http://nickandsam.net/uploads/1/3/0/6/130620456/rexajiku.pdf
    • http://nexacreativeconsulting.com/uploads/1/3/0/6/130621890/gigod-gaxekatil-vemimerar.pdf
    • http://locary.net/uploads/1/3/0/5/130588773/4081989.pdf
    • http://corona-towingservice.com/uploads/1/3/0/4/130436307/volawakatenexit.pdf
    • http://burnellinfinitymath.com/uploads/1/3/0/4/130435987/9bad7e08f.pdf
    • http://theotherevilsister.com/uploads/1/3/0/7/130775403/9964512.pdf
    • http://mydigitaldiva.net/uploads/1/3/0/5/130543941/sadarubanoril.pdf
    • http://new-style-trailer.com/uploads/1/3/0/6/130605238/vawes.pdf
    • http://beckmannmediagroup.com/uploads/1/3/0/4/130491253/9de53f8aa05c.pdf
    • http://hypnotherapymusic.net/uploads/1/3/0/8/130874338/bemepaw.pdf
    • http://shopjollygoods.com/uploads/1/3/0/8/130814161/130814161.html#financial+leverage+ratio+of+3
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001359.bin
a26532f4de3a9ec4d3503b5e4cf743fc2562fc5c183fec5bd75f3bc70def4b38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1359 8948 bytes
font_01_sfnt_off00007516.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7516 16036 bytes

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