Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9fcbfd61f2fbd2c…

MALICIOUS

PDF

79.2 KB Created: 2021-07-17 05:44:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1e3cca627702b2e082b582fee0d508cf SHA-1: 6837e66cba9579c8ba438e4e5a83dc4fd66a1721 SHA-256: e9fcbfd61f2fbd2c955c3518e4063226217e624b664123924c0568880e39922c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 some are marked as benign, suggests potential phishing or redirection to malicious sites. The wkhtmltopdf authoring application is unusual for typical document content, further supporting a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8134

Heuristics 4

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://feedproxy.google.com/~r/razvivatel/yapz/~3/7R6buoffwiA/square?utm_term=she+say+do+you+love+me+i+say+only+partly
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f242d0de9f7d6ab7b0f67d/1626489552235/dr_young_vet.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60efd6b8b3de5a36b1251131/1626330808183/53087196343.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60efc94a3db90d3c356db01e/1626327370568/56709851056.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f05d2b0d9e4679a05aa650/1626365227199/coherence_in_a_sentence.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec946a0e7a3c5fba3efb0c/1626117226894/dunirezabam.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0a0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A0 16792 bytes
font_01_sfnt_off0000e8b7.bin
325516498259f383b47aac200913de962bde6de07198e4a898f0c8f6138ec6a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B7 11012 bytes
font_02_sfnt_off00010225.bin
1595aace8d23c2099a70db33f99028f3d7fa63c3fad4491a6665bbc0479ef2c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10225 17276 bytes

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