Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a8d592aade34793…

MALICIOUS

PDF

104.6 KB Created: 2021-07-16 00:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 084ba48c20325c02c5ffdb13e0b34ede SHA-1: b9a599108254bfde8a7f8a85fcc4e6dba1faadaa SHA-256: 7a8d592aade347938d5a7fce9ced2cd34fb37d8ab34648914635ea095d994bd5
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains embedded URIs, one of which points to a potentially malicious domain, and the document body is heavily obfuscated. The presence of embedded URLs and the ML classification suggest it is likely a phishing or malware delivery attempt, possibly using JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7738

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/UQ8tT55rDuk/square?utm_term=chicago+pd+jay
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e94a8c2dabf2723555a78e/1625901708612/23945920086.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8008e80504e0a776b0662/1625817230871/11.4_areas_of_regular_polygons_answers.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60edb4518b6fd72876177fe0/1626190929768/black_wolf_puppies_for_sale.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e91bcc563c1506a8b5fa7c/1625889740236/luvegitorasatekafudupegux.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec8efe1cff58014d549c5a/1626115838366/56301273940.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_off00013b9d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B9D 16792 bytes
font_01_sfnt_off000153af.bin
5ed7f8a2ad624320a6fa061d03fcb91ddba80bb9e8199d484d4f57ff58317677		 pdf-font-stream PDF embedded font (sfnt) at offset 0x153AF 16828 bytes
font_02_sfnt_off00017f62.bin
046905b2d9d092a75285305395ce1657ddbe2e7be959d880695f863f79773965		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17F62 10420 bytes

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