Malicious PDF — malware analysis report

Static analysis result for SHA-256 34f4705737f04ec3…

MALICIOUS

PDF

79.7 KB Created: 2021-07-14 01:01:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1c0b7fca00f214fbfdba567870b9478a SHA-1: abc7408743aa3816829d0791e8e1f67554c6d588 SHA-256: 34f4705737f04ec3c934c35f2e03140c4cbd500b7915cbcb6416628b8f347104
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains embedded URLs that likely lead to the download of a secondary malicious payload. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8571

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/rCno-htTzZk/square?utm_term=photosynthesis+in+plants+pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee0075bf52576c624ac42d/1626210421431/rikadabudusudi.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e883ade5740644843ce777/1625850797371/46661305861.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e86ed1939f1c477727648c/1625845458003/wumukewudokitorobujuvibe.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60edd9f6930ff80baa0ba8ce/1626200567541/72005423085.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e9596b37cb904475619f39/1625905515180/xajaduvavumotamuz.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8750f2ab7ea7130869aa1/1625847055106/witizubulumo.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_off0000d6ba.bin
ccc65cb878d2eb4c49f9929cd331ab8c8f9e8320d4583de2ceaa1e2ad6d8d0e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6BA 16816 bytes
font_01_sfnt_off00010294.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10294 16792 bytes
font_02_sfnt_off00011aab.bin
c6c9280d1520a5d208d6237fd846d51103ff5ef3230f1b48c4f47e5ea640ac6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AAB 10612 bytes

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