Malicious PDF — malware analysis report

Static analysis result for SHA-256 18b89dfa2a67ded3…

MALICIOUS

PDF

78.3 KB Created: 2021-07-21 09:09:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 46df563569af1d2f388e9ae4a3904806 SHA-1: 58eefd61d3b4bd7227e6eae0d2e5776219538621 SHA-256: 18b89dfa2a67ded36945010f47d361662515513217e1fd9691170cb5ad4016c1
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 URI pointing to the suspicious domain 'irlanc.ru', which is likely a phishing lure. No scripts were extracted, but the presence of external URIs and the overall classification strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6556

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://irlanc.ru/square?utm_term=church+feast+meaning
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edadc2ac23c31e62fec7a1/1626189250601/44073595982.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee622907d0587a37657c98/1626235433875/lefesutidob.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f6d6b71632be6a95caad04/1626789559626/12th_house_and_past_life.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_off0000d266.bin
b3f8cbd81b5cf66f15405eeacf96fc56c131ff86e58aab543767b9b1b635cef2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD266 10748 bytes
font_01_sfnt_off0000eafb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFB 16792 bytes
font_02_sfnt_off0001030d.bin
5c92d16b931f5115fdd45ce27e54cdf259ceb6d12f56bece569f88c772e99326		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1030D 16516 bytes

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