Malicious PDF — malware analysis report

Static analysis result for SHA-256 2991a3c646d8cf70…

MALICIOUS

PDF

87.7 KB Created: 2021-07-17 11:58:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 03656dddcba6faa751ef0145f2b532b3 SHA-1: 6018ea3042c19c6a8b479e097ad3ae74f620d900 SHA-256: 2991a3c646d8cf70906f2bfe1eb4940d7d78f795abdc832040304e884fb82ee2
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains an embedded URL that points to a Google feed proxy, which in turn redirects to a potentially malicious Squarespace URL. The ClamAV detection 'Pdf.Phishing.Trojan' strongly suggests a phishing attempt. Although no scripts were extracted, the presence of embedded URLs and the ClamAV signature indicate a malicious intent to redirect the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier clean score 0.1792

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/EjZ5HCEZs_A/square?utm_term=niggle+meaning+in+english
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f1f8f6c5becd4b2f0ba2bf/1626470646379/68544736152.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f23eddd68f3225904e019b/1626488541353/what_does_badge_app_icon_mean.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e82007687a3d659a4ede2a/1625825288036/cue_cards_ielts_with_answers.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4f1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F1 16792 bytes
font_01_sfnt_off0000dcfe.bin
9011712547da61165e1887e1e9a41e49366f5a6efd60186f6e2da7c3d3591e78		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFE 3348 bytes
font_02_sfnt_off0000ead4.bin
067f48074fb189959e7cf2cc7edd7851957e3cff1be364a47fe3075363cbf1fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD4 16484 bytes
font_03_sfnt_off000101e9.bin
9c84eb11bec836c189d2ec2c570056d898109a2b9b92b4f59a2d395517817c0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101E9 10216 bytes
font_04_sfnt_off00011880.bin
2fde033f237a906a75a84472ad3fb0eb33573d6f955bb12b1e1bd737ead7c6df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11880 22316 bytes

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