Malicious PDF — malware analysis report

Static analysis result for SHA-256 df8b073d610dfbb6…

MALICIOUS

PDF

59.7 KB Created: 2021-04-22 07:44:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a25f64fb9cd68e0d764b06fb7821857 SHA-1: 4cfcb25d21f7fde4261a7afc35bb1374cafe2123 SHA-256: df8b073d610dfbb6fd4e287038f4e60a3298e5739ea764354cc3ab6db110d1fe
94 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. The document body contains a lure related to 'network security jobs remote', and multiple embedded URLs are present, some of which are unknown or potentially malicious. While no scripts were explicitly extracted, the PDF format can embed JavaScript for malicious actions, and the presence of external URIs suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7822

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://oaklandchildcare.org/sites/default/files/webform/55178968397.pdf
    • https://www.jwico.com/sites/default/files/webform/47965191786.pdf
    • https://www.osgeurope.com/sites/osg-corporate.dev/files/webform/kanuvanirarotugawabu.pdf
    • https://www.jwico.com/sites/default/files/webform/xojisipet.pdf
    • https://www.osgeurope.com/sites/osg-corporate.dev/files/webform/bedadijone.pdf
    • https://www.pharoxglobal.com/sites/default/files/webform/70645978292.pdf
    • https://www.mothercare.ro/sites/default/files/webform/resumes/77861868930.pdf
    • http://seiary.com/sites/default/files/webform/rec/pexutagizoniged.pdf
    • http://klm3fg.grhosting.cz/sites/default/files/webform/files/todoxobolukajit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=network+security+jobs+remote
    • https://ubmemeaensoprod.s3.amazonaws.com/ifsec_international/call_for_papers/2021/03/jonigumeneritid.pdf
    • https://minorsoncampus.princeton.edu/system/files/webform/fujixedapilevunagujos.pdf
    • https://minorsoncampus.princeton.edu/system/files/webform/27732669772.pdf
    • https://ubmemeaensoprod.s3.amazonaws.com/ifsec_international/call_for_papers/2021/03/60395266702.pdf
    • https://campusrec.princeton.edu/system/files/webform/wawojamifot.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4ed.bin
a0ef5517ef7475802b0c13f1016397a9410fa65b49e73d1d3344784e81edf927		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4ED 5144 bytes

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