Malicious PDF — malware analysis report

Static analysis result for SHA-256 a16718143c277676…

MALICIOUS

PDF

76.2 KB Created: 2021-07-13 22:13:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9913fc9253e71f27c64ab1a5604bf425 SHA-1: ab2e88c96388b4f25e184e8e2d8b9609462e80d3 SHA-256: a16718143c2776768fdce3034970cf88b11b2bcb90c6ba91b4554de50b3f11ed
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, despite some being marked as benign, suggests an attempt to lure users to external sites. The PDF structure and metadata, including the authoring application 'wkhtmltopdf', do not provide specific indicators of a known malware family, hence 'unknown family' is used.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8715

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/AnJPYMJXbyQ/square?utm_term=proprietor+meaning+in+kannada
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60edd2d9a9aa746350caa0b6/1626198745401/43381594750.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec8c0ee4ca3800a11847ae/1626115087243/electronic_configuration_of_inert_gases.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e92cf8c0906550d90b910e/1625894136433/hierarchy_of_authority_definition.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed6c88f2de0a6ebf3319a3/1626172552102/5622415597.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8c5041b22c82f862d1781/1625867524442/unarmed_fighting_style_5e.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_off0000cb79.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB79 16792 bytes
font_01_sfnt_off0000e390.bin
76a35f00e2a0b2a861b343f95be63edeb4e23f0fae2a45635d6ebcb95443921d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE390 10612 bytes
font_02_sfnt_off0000fb85.bin
4ccf0ff62f2b10eabb8cbdb43e6ef832215e87d79bce14c22b194a455e6f3920		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB85 15508 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.