Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fe9de1b1170d2f5…

MALICIOUS

PDF

96.5 KB Created: 2021-04-06 20:17:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f4602c546823c461269b1bb6f3bb4ef SHA-1: ac3e4e52bea06d9ae973167d53951234397955fd SHA-256: 0fe9de1b1170d2f5133ae0874e91b844de5bf36e0ec9835e8e62807901b0ba99
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains numerous embedded URLs, many of which point to PDF files hosted on compromised websites, suggesting a phishing or credential harvesting attempt. The presence of PDF_URI and EMBEDDED_URL heuristics further supports this, indicating the document's intent to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8771

Heuristics 3

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://klm3fg.grhosting.cz/sites/default/files/webform/files/22206840813.pdf
    • https://vectorcorp.net/sites/default/files/webform/resume/86038084563.pdf
    • https://ambrose.edu/sites/default/files/webform/28961662769.pdf
    • https://www.woonsocketri.org/system/temporary/webform/54194604641.pdf
    • https://www.enwidth.com/sites/default/files/webform/resumes/bemefunojupupik.pdf
    • https://www.osgeurope.com/sites/osg-corporate.dev/files/webform/nutuzisujobipusife.pdf
    • http://klm3fg.grhosting.cz/sites/default/files/webform/files/zavemazawutojene.pdf
    • https://www.osgeurope.com/sites/osg-corporate.dev/files/webform/28911573484.pdf
    • https://www.newburghgroup.com/sites/default/files/webform/resumes/mogewewe.pdf
    • https://www.ofalloncasting.com/sites/default/files/webform/34904816646.pdf
    • https://www.osgeurope.com/sites/osg-corporate.dev/files/webform/memirudomonejusowanasu.pdf
    • https://natsihwa.org.au/sites/default/files/webform/kixeje.pdf
    • http://cicatsalud.com/html/sites/default/files/webform/32041770382.pdf
    • https://www.jsif.org/sites/default/files/webform/vinuriruxelapaviwona.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=biological+evolution+of+humans+pdf
    • https://minorsoncampus.princeton.edu/system/files/webform/xadumiwedom.pdf
    • https://lib.asu.edu/system/files/webform/dilitopuwivane.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014142.bin
f76040b6d99adc51ca9c237b0819b2f8d5304302f71ca234d553ea046027ef72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14142 5580 bytes
font_01_sfnt_off0001542d.bin
1bab0a636c8332f60d1daf94f1252b08826dcc17f7bd0571adc7eb3c027efa8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1542D 12184 bytes

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