Malicious PDF — malware analysis report

Static analysis result for SHA-256 0faf0cf6af5d492f…

MALICIOUS

PDF

114.6 KB Created: 2021-04-16 18:15:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78a4f2aa7048bd38f7de688ba14d5710 SHA-1: 5ca7e3ca5313e01255cf6b395de52699dbe81cde SHA-256: 0faf0cf6af5d492fe2e4f4e152f66c67f52b630315fb14f9a6428d61e834e580
94 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, although many are benign or unknown, suggests an attempt to redirect the user to potentially harmful sites. The PDF structure and heuristics point towards a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9617

Heuristics 3

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://www.natsihwa.org.au/sites/default/files/webform/72917344941.pdf
    • https://www.uts.cw/sites/default/files/webform/50818196885.pdf
    • http://seiary.com/sites/default/files/webform/rec/47545977947.pdf
    • http://klm3fg.grhosting.cz/sites/default/files/webform/files/mimixinaxeralowevowijut.pdf
    • https://www.osgeurope.com/sites/osg-corporate.dev/files/webform/47147916176.pdf
    • https://www.dgs-interparts.be/sites/default/files/xufatonapa.pdf
    • http://www.birdlifebotswana.org.bw/sites/default/files/webform/sightings-sketches/beporu.pdf
    • http://russian-ice-spb.ru/sites/default/files/webform/files/40307308503.pdf
    • https://www.mothercare.ro/sites/default/files/webform/resumes/49428740932.pdf
    • https://www.ofalloncasting.com/sites/default/files/webform/tasuwagorefovufozibojer.pdf
    • https://www.jwico.com/sites/default/files/webform/kupoxogij.pdf
    • https://www.mothercare.ro/sites/default/files/webform/resumes/42535902170.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=ieee+802.11+standards
    • https://printandmail.princeton.edu/system/files/webform/31356988355.pdf
    • https://printandmail.princeton.edu/system/files/webform/mizol.pdf
    • https://campusrec.princeton.edu/system/files/webform/7624886728.pdf
    • https://ec.europa.eu/eip/agriculture/sites/default/files/webform/juvuwudonuvusenovirem.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019101.bin
933f5484dc594133c66938026ad997306a27fea267fe09321a3599a384875c24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19101 5276 bytes
font_01_sfnt_off0001a301.bin
99f4ccb9d91278ce35263c18881e12bb4accf5642e0d76f8f6dcf33a0d7ba01e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A301 12440 bytes

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