Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e4a5b7984fc9c37…

MALICIOUS

PDF

43.5 KB Authoring application: pstoedit First seen: 2020-09-24
MD5: 4f89ac8edd9f1009dfcd7e11e203e4a1 SHA-1: 6ab4b888767332b05632616e4b8f67e512d0eebf SHA-256: 7e4a5b7984fc9c372aa78a8e8794e5fb8d53d75355480fa45f55305fe9b4b76d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links to other PDF files, a technique often used for SEO manipulation or to distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body text is heavily corrupted and does not provide further context.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • 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://lastpostwins.com/uploads/1/3/0/5/130539457/f5a90cd142367.pdf In PDF document text
    • http://theacademicadvisinggroup.com/uploads/1/3/0/6/130639413/1946222.pdfIn PDF document text
    • http://sumitsakhuja.com/uploads/1/3/0/7/130776111/3bdd86a7ada584.pdfIn PDF document text
    • http://beshearsconsulting.com/uploads/1/3/0/2/130289495/zigebazow.pdfIn PDF document text
    • http://chivor-emeralds.org/uploads/1/3/0/6/130640144/bubejuxidofa.pdfIn PDF document text
    • http://westportbiblechurch.org/uploads/1/3/0/9/130969957/xademabaketumobapon.pdfIn PDF document text
    • http://www.bodyartanddesign.com/uploads/1/3/0/2/130291593/fepagolipe.pdfIn PDF document text
    • http://juramont.com/uploads/1/3/0/7/130776678/2549075.pdfIn PDF document text
    • http://mustangremediation.com/uploads/1/3/0/8/130813357/nulowabezuxajenesis.pdfIn PDF document text
    • http://christinaannwilliams.co.uk/uploads/1/3/0/5/130589219/4360390.pdfIn PDF document text
    • http://hostmaster.tobymuse.com/uploads/1/3/0/3/130324030/wakejoj-ramiv-risugogarivena-zawesobivig.pdfIn PDF document text
    • http://zhcw.brdge.org/uploads/1/3/0/7/130776257/130776257.html#subject+verb+agreement+quiz+hardIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000378a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x378A 16204 bytes
SHA-256: f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d
font_01_sfnt_off00004fcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FCB 9280 bytes
SHA-256: 281132627f2599bd5537b59932fd5a0976b33450d63b500db64168192cbd8b72

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