Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2c8fc5555abeb39…

MALICIOUS

PDF

74.7 KB Created: 2021-04-17 11:53:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6dd8d3fb7ee44c431376b7eef8c45bea SHA-1: 6550c47cba789807eda5340aaf670e0cc065bd73 SHA-256: b2c8fc5555abeb397a0267a4f7961384ffd3409f11d85faf4233842d24741b09
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, indicating a high likelihood of malicious intent. The PDF contains embedded URLs, one of which is flagged as potentially malicious, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a common attack pattern of luring users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9853

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://portal-mysigma.com/system/files/student-proof/72808970040.pdf
    • http://klm3fg.grhosting.cz/sites/default/files/webform/files/wajuso.pdf
    • http://cicatsalud.com/html/sites/default/files/webform/86929885116.pdf
    • https://www.natsihwa.org.au/sites/default/files/webform/17947704001.pdf
    • https://www.woonsocketri.org/system/temporary/webform/viwubamonutimujogigifowi.pdf
    • http://www.grotekeukens.be/sites/default/files/webform/gmawards2018/30150103061.pdf
    • https://www.pharoxglobal.com/sites/default/files/webform/70645978292.pdf
    • http://cicatsalud.com/html/sites/default/files/webform/53132673180.pdf
    • http://seiary.com/sites/default/files/webform/rec/jizexatunurometubukos.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=tell+me+a+little+bit+about+yourself+interview+question
    • https://campusrec.princeton.edu/system/files/webform/luzatebinibaxopititum.pdf
    • https://community.princeton.edu/system/files/webform/xakefabobadu.pdf
    • https://drones.princeton.edu/system/files/webform/vijebutipide.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9e4.bin
46295bd0276c2aebe26cf569631b8957e388a5f2df1b5da3af517f4612d67076		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E4 5380 bytes
font_01_sfnt_off00010c30.bin
246ce84765437dbb8b0d6602f75c92609f969fbb7996d7da536b8c1238bb6c87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C30 10552 bytes

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