Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d93549cf0d3cc69…

MALICIOUS

PDF

77.5 KB Created: 2021-07-20 05:04:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e0750a7138cb97a8d4b0f311916cee62 SHA-1: c060e801faa9604add473986ac459e588b071fe3 SHA-256: 9d93549cf0d3cc69eabc1f3e45be63069fce4574a822107077255a556f25930d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains embedded URLs that lead to external websites, one of which is presented as a lure. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest an attempt to redirect the user to a malicious site, likely for phishing purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7604

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/r_nBws6J8g8/square?utm_term=what+does+bts+the+band+stand+for
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec7a06760c9e2bcf421687/1626110470520/how_to_remove_hand_tool_in.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60edb5998b02447bbdddd379/1626191257394/zorinobuwaxudapazipu.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f62104b39ca66bf8ccfb57/1626743044261/property_and_casualty_study_guide_free.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_off0000ce2b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE2B 16792 bytes
font_01_sfnt_off0000e642.bin
ee142a11f9f22e526fb928ffa116a20a3b2abe8cc130567bb8a39da7140dfced		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE642 10448 bytes
font_02_sfnt_off0000fde5.bin
2c263dd13cf0470ec9f6adcd2142ee5cf7e108b87dd57594ebad2b7b53b43cb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE5 17104 bytes

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