Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9ecd9b5313e9fcc…

MALICIOUS

PDF

76.5 KB Created: 2021-07-16 13:41:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7f54f3d2190f4c25c2d704d15c72c9bc SHA-1: b21d37bf5c22df7e9c7bbc81b91f994ec032f0d8 SHA-256: d9ecd9b5313e9fcc9fb251ee1dc1c268a41272eb33a2eb3642c78458b36039fa
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. An external URI pointing to 'irlanc.ru' was extracted, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the overall classification strongly suggest this document is part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9125

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://irlanc.ru/square?utm_term=tense+exercise+for+class+5
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f15c8bc08012782f83311f/1626430603816/pokovibunipepopuga.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7d11ed0799e4214c01bf0/1625805086581/20250711415.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec7b6b950202184f0fa91e/1626110828008/the_law_on_negotiable_instruments.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e844ababf7595fb54d9305/1625834668230/seluxiwamew.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7e5b8e8ef4d41b4fb2baa/1625810360581/jotatozusizepa.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_off0000ca51.bin
545e65a4e18b07ebb770673760de77376ead698c6af0755268afcfbdc61bd4cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA51 10428 bytes
font_01_sfnt_off0000e221.bin
0683a6ee9bca456991d8889e3c63f0ad12b83ed5cbb422db06fe57a65f80d53c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE221 16892 bytes
font_02_sfnt_off00010e18.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E18 16792 bytes

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