Malicious PDF — malware analysis report

Static analysis result for SHA-256 821c53cf2da73772…

MALICIOUS

PDF

65.4 KB Created: 2021-04-10 05:25:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4cac38d382a56f6760d168d33bc1efc1 SHA-1: b318f34e755503411f504862fdcb1bb0f0d14fd5 SHA-256: 821c53cf2da737728e3c914e34c8baeff5beecf4b4605962202b03b283aabed7
94 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains multiple embedded URLs, one of which is associated with a feed proxy, suggesting a potential redirection mechanism. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7773

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 https://ambrose.edu/sites/default/files/webform/2306024917.pdf
    • https://www.woonsocketri.org/system/temporary/webform/kebadewanizokodijixupid.pdf
    • https://www.a1touchsolution.nl/sites/default/files/56489371510.pdf
    • http://seiary.com/sites/default/files/webform/rec/jizexatunurometubukos.pdf
    • http://www.muttypawsacademy.com/sites/default/files/webform/vaccines/95859103094.pdf
    • https://extranet.blanchisserie-toulousaine-de-sante.com/sites/extranet.blanchisserie-toulousaine-de-sante.com/files/documents/justificatifs/ratasivovo.pdf
    • http://www.pbttphtk.gov.my/sites/default/files/webform/238550972.pdf
    • https://vectorcorp.net/sites/default/files/webform/resume/wogudodijanaferewinige.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=prise+de+sang+gaj
    • https://community.princeton.edu/system/files/webform/42655509772.pdf
    • https://gradfutures.princeton.edu/system/files/webform/ninavixokamorul.pdf
    • https://lib.asu.edu/system/files/webform/bidemuf.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0b8.bin
6dfdc50e6c96014e5d39ad3c2b618c6aee996daba2b7d6276b4e294af35d96f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B8 5040 bytes

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