Malicious PDF — malware analysis report

Static analysis result for SHA-256 a778b1f88078d7c6…

MALICIOUS

PDF

79.3 KB Created: 2021-07-14 04:19:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ab6931690f208acf9ea011d1ce632c3c SHA-1: f0973cd9c012a73389763d6e45574a7451816a75 SHA-256: a778b1f88078d7c607aa0aedd387e3047f245bcfc52e6d64faf59cc0ad8a9104
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ClamAV heuristic identified this PDF as 'Pdf.Phishing.Trojan-d2568dad23a94d95'. The presence of embedded URLs, although many are marked as benign, suggests a potential for phishing or redirection to malicious sites. No scripts were extracted, limiting the analysis of specific malicious behaviors.

Machine Learning

  • Nyx PDF Classifier clean score 0.1467

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/sq/ugae/~3/1LSSs5qy-i4/square?utm_term=sdg+health+and+wellbeing
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ede5221c6c1a61d525bc3e/1626203426809/57671361131.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec7cec12c1416d2f1a1804/1626111212526/60996827278.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_off0000d3d9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D9 16792 bytes
font_01_sfnt_off0000ebeb.bin
ef10438f1aa8c2854242f0f2ab4c2fa74f824fd3caa5ed71b11dc908ffc91bac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEB 17516 bytes
font_02_sfnt_off00011a09.bin
6fbaec4c1c8f017cac92801a945322af53e588d80cc1897c74b12eb9138bb4a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A09 10440 bytes

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