Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3ed2ac67d306cf0…

MALICIOUS

PDF

78.2 KB Created: 2021-07-13 19:34:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a89c8f07fb1aa5ad2bde919b9983ce58 SHA-1: d5593b13e3cf8ed3df3df7a841b4ea8b5e409b87 SHA-256: d3ed2ac67d306cf05bed200bc487ccf8ab8da51b08a6ead9efb0c4383efc70dd
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely for phishing purposes. No scripts were extracted, but the presence of the malicious URL and the detection signatures strongly indicate a phishing attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9478

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://drafthe.ru/square?utm_term=family+therapy+for+eating+disorders
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e76953e5d5821bb0e78757/1625778515409/how_invented_the_first_car.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e924b7b68d8f0f4bf8644d/1625892024017/76183964331.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed90dcc439f828716708bd/1626181852227/juzajusaso.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec9afb69d4b63361491667/1626118907475/92934874944.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e923945ebba154a8fc55cd/1625891732605/objections_to_descartes_meditations.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ecdd518c96c6301f8d0eda/1626135889843/odd_number_pricing_strategy.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60eca7e4243eac6055d249bd/1626122212349/heart_touching_poem.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed450ec50d503b9d565eb3/1626162446639/absolute_convergence_test_examples.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_off0000d0b4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B4 16792 bytes
font_01_sfnt_off0000e8cb.bin
749aa6ebd54104484d8c5dd19c5e0d74fda16a320b2c22466ad5f859f29c84f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CB 11036 bytes
font_02_sfnt_off00010206.bin
8d41147bb7c057bbb10cddee5b2fdf91ba96050ec8ca78c243933f7520bea43e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10206 16448 bytes

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