Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eca224421e42521…

MALICIOUS

PDF

74.3 KB Created: 2021-07-13 10:31:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 341f31e72e597a2e04a05ad376ec6f1a SHA-1: aefd6d8af1f49b54baa49433ec5c195c0097bf58 SHA-256: 9eca224421e425216b6a77823271610763a3eb4bd06dcb5d4a2dd8ba1c37bb29
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The presence of embedded URLs, although many are marked as benign, suggests an attempt to redirect users to malicious sites. The wkhtmltopdf authoring application and the nature of the heuristics indicate a potential for exploiting PDF vulnerabilities or delivering malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8907

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/mHcMeCcfVl0/square?utm_term=5+gmt+to+ist
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8c18b4c181567023c2c9b/1625866635543/thestrals_from_harry_potter.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8faa319a9f87deb713d2b/1625881251521/xitaduwisutorome.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e96122c0906550d90d0864/1625907490542/painting_terms_art.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e9330f8ce0e10532d343e3/1625895696089/nogoramutuxa.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60eccad438b7e93e8f977e1e/1626131156473/princess_and_the_frog_dr.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e794ed85664d35b0e362cc/1625789677216/elt_approaches_methods_and_techniques.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_off0000c1a4.bin
98027d8a85dc0ab79a2943a9f4970dc52e4142de13c686e71374e829200459ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1A4 17356 bytes
font_01_sfnt_off0000ef8f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8F 16792 bytes
font_02_sfnt_off000107a5.bin
74e0c20483070bdcf96cc5ca7b131220a5264958f860e75029b26df2b1abfd8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107A5 9944 bytes

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