Malicious PDF — malware analysis report

Static analysis result for SHA-256 91f8caf799948ac7…

MALICIOUS

PDF

33.6 KB Authoring application: pstoedit
MD5: 325b77eba733d4902b163c818db358e7 SHA-1: 23ce735e78151d1055e5468572b9b8548c4fb014 SHA-256: 91f8caf799948ac77b3bcf4b264e05e0a5633b4584edf2ec1274bc6e9369bcda
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links to external PDF files hosted on various domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly suggest malicious intent. The embedded URLs are likely used to redirect users to malicious content or further stages of an attack. No scripts were extracted from this sample.

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://nevadarapidcash.com/uploads/1/3/0/3/130313235/7494904.pdf
    • http://camelcottage.com/uploads/1/3/0/5/130540214/1c7f67.pdf
    • http://stmmlwr.org/uploads/1/3/0/2/130289669/dbf36276ffdda26.pdf
    • http://mydmdesign.com/uploads/1/3/0/6/130604098/1cfe269.pdf
    • http://inthekingdom.org/uploads/1/3/0/4/130488228/61809.pdf
    • http://adamellis.us/uploads/1/3/0/2/130291779/josumejukoxezudi.pdf
    • http://duganspecialties.com/uploads/1/3/0/7/130739488/xawemefobedezulaniw.pdf
    • http://arihua.com/uploads/1/3/0/6/130620928/jasebopeka-titesinogofolu-gaduvu-budebafiz.pdf
    • http://premierserv.net/uploads/1/3/0/7/130740087/5684538.pdf
    • http://mrspsela.com/uploads/1/3/0/4/130483811/nizobefupefutisa.pdf
    • http://chatovertea.com/uploads/1/3/0/2/130289369/5276195.pdf
    • http://picturemachines.com/uploads/1/3/0/6/130620689/daxiretovedipo.pdf
    • http://hashgordon.com/uploads/1/3/0/6/130605017/sesawititufozum.pdf
    • http://www.ninsevangelistapt.com/uploads/1/3/0/5/130588676/417275.pdf
    • http://ikayak-siestakey.com/uploads/1/3/0/2/130270914/d219d0885fc7f.pdf
    • http://dusd-cte.net/uploads/1/3/0/2/130272851/130272851.html#descargar+programa+foxit+pdf+editor+gratis+en+espa%C3%B1ol

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002842.bin
1417ea9e4355848bd5ad2e0ba06c59202a3da8d9104ac34815f1ae96ef0f5fa9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2842 8488 bytes

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