Malicious PDF — malware analysis report

Static analysis result for SHA-256 d44ca9e05eaa1f09…

MALICIOUS

PDF

80.0 KB Created: 2021-07-19 20:05:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 67429e4d1c7fce9b532a7b60d47055e3 SHA-1: d1d1ee29282ef1f16e26dd95defadd3f37bb81bc SHA-256: d44ca9e05eaa1f09cb6f809232ed9e3c62c5bfbd27eeeb9de88e8bd9190c74b3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and also triggered a machine learning model indicating maliciousness. It contains embedded URLs, suggesting it is part of a phishing campaign. Although no scripts were explicitly extracted, the PDF format often utilizes JavaScript for malicious actions, hence the inclusion of T1059.007.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5793

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/razvivatel/yapz/~3/um1bUVUAM38/square?utm_term=cold+sore+in+throat
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f512081db272198fac1e2a/1626673672150/jexevekito.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e78c724454ab0ddd8155ca/1625787507076/scriptures_on_influence.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e948b9c91b61347ea4d52d/1625901241584/why_did_the_cookie_go_to_the_hospital.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eda0efc8cbd011b90c22d8/1626185968036/63672389903.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_off0000da73.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA73 16792 bytes
font_01_sfnt_off0000f28a.bin
c8a702370c9d7c2d49436777afd3eacb5ff6f8a2c76e78e75a064bf4a7ef665a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF28A 10376 bytes
font_02_sfnt_off000109e4.bin
57af42b9ce3070767d37ab622dea1c4d10abdca3d14ee63617b25b7e20739be1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109E4 16404 bytes

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