Malicious PDF — malware analysis report

Static analysis result for SHA-256 d55bfbe1d0a04161…

MALICIOUS

PDF

64.0 KB Created: 2021-04-25 21:51:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8780f75cceebcc035af987e6d0d43b01 SHA-1: 84571d73827068d1c2e8bbfd7e2dba905c78984a SHA-256: d55bfbe1d0a041611a82f056d19f5a8d91405aefd4b9e54eaa4b6b35c9f458b5
94 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV and flagged by an ML classifier, indicating malicious intent. The presence of embedded URLs, although one was confirmed benign, suggests an attempt to redirect the user to malicious sites. The document body is heavily obfuscated, but the overall structure and heuristic firings point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9819

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.pharoxglobal.com/sites/default/files/webform/80628544521.pdf
    • https://ambrose.edu/sites/default/files/webform/58588935603.pdf
    • https://www.ofalloncasting.com/sites/default/files/webform/tirudekamevajoluzagobumi.pdf
    • https://www.mothercare.ro/sites/default/files/webform/resumes/susumijifiwef.pdf
    • http://cicatsalud.com/html/sites/default/files/webform/21030689395.pdf
    • https://www.cdcplumbing.com/sites/default/files/webform/contact-us/65589142167.pdf
    • https://www.ofalloncasting.com/sites/default/files/webform/taxebuvokorutupimapo.pdf
    • https://www.enwidth.com/sites/default/files/webform/resumes/95374483905.pdf
    • http://www.birdlifebotswana.org.bw/sites/default/files/webform/sightings-sketches/12812059159.pdf
    • https://ambrose.edu/sites/default/files/webform/natogaj.pdf
    • https://grossenbacher.co.nz/en/system/files/avoidance-training-certificates/13178745316.pdf
    • http://klm3fg.grhosting.cz/sites/default/files/webform/files/zavemazawutojene.pdf
    • https://web.liderpapel.com/sites/default/files/webform/53484808665.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=cyberpunk+2020+sourcebooks+pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0b3.bin
208506520af0c30af0a5e7ef997c28daabc3dfeb25e7b0b51d86fb0eb7af1df7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B3 5392 bytes
font_01_sfnt_off0000e321.bin
7aabf82781af9d5749af21d00b5d73c007b4df4bf0d3448138bc91aae97f33c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE321 10340 bytes

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