Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccc15a4bdc9a5750…

MALICIOUS

PDF

57.4 KB Created: 2021-04-12 21:07:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75baafd39c709ef781bddf0e3f693975 SHA-1: 80c8e4cdd1ee8555e925b7763ddfb61007f2e1aa SHA-256: ccc15a4bdc9a5750d5362e76e09f92531ac42a447cfd2bbc5fff884831c62dca
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that was flagged by ClamAV as Pdf.Phishing.Trojan. The ML classifier also indicated a high probability of maliciousness. The document body, though heavily obfuscated, suggests a lure related to educational materials, specifically 'Cambridge preparation for the toefl test book'. The presence of numerous embedded URLs, many pointing to PDF files on various domains, indicates a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8225

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://www.birdlifebotswana.org.bw/sites/default/files/webform/sightings-sketches/bikepekeroluxujopabiko.pdf
    • https://www.dgs-interparts.be/sites/default/files/viwiredozilopuvotudulufez.pdf
    • https://www.osgeurope.com/sites/osg-corporate.dev/files/webform/28911573484.pdf
    • http://cicatsalud.com/html/sites/default/files/webform/25507329945.pdf
    • http://seiary.com/sites/default/files/webform/rec/pexutagizoniged.pdf
    • https://www.blplegal.com/sites/default/files/webform/3097059720.pdf
    • https://www.a1touchsolution.nl/sites/default/files/wozupidojenebimovom.pdf
    • https://www.enwidth.com/sites/default/files/webform/resumes/ralivowu.pdf
    • https://ambrose.edu/sites/default/files/webform/9979090083.pdf
    • http://www.sumnercountyhospital.org/sites/default/files/webform/27017481005.pdf
    • https://www.afscme65.org/system/files/webform/11173368180.pdf
    • http://www.guninetwork.org/system/files/webform/heirri_proposals/44437875789.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=cambridge+preparation+for+the+toefl+test+book
    • https://lib.asu.edu/system/files/webform/sikukuditizituxabisezopel.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca99.bin
c205b89bcb71e612530c6c056e1682cce66ceab930f646dd6f5b91c17efc20e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA99 5472 bytes

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