Malicious PDF — malware analysis report

Static analysis result for SHA-256 3433abc11812a16c…

MALICIOUS

PDF

75.1 KB Created: 2021-07-14 10:02:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2cb96a6e72675666bcfe18d4e211b240 SHA-1: 8f138c37b60a0ed840893501f7f9f7623d329fdd SHA-256: 3433abc11812a16c100427140f01d8f046779be1027b4a08ed426afe4332424c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded external URI pointing to a suspicious domain, identified by ClamAV as a phishing trojan. The ML classifier also flagged the PDF as malicious. While no scripts were explicitly extracted, the presence of the malicious URL suggests an attempt to redirect the user to a harmful site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6911

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://krisoc.ru/square?utm_term=how+to+level+up+mastery+rank+in+warframe
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8305880504e0a776d35a8/1625829464812/sosekenasesapemomida.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec88097726b430b468b514/1626114057636/electrical_engineering_literature_review_example.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7a77de8ef4d41b4f7d691/1625794429509/how_much_is_64_ounces_of_water_in_litres.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec78eec8b0d544b6d690d6/1626110190689/natigenireduzetapu.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_off0000c3cc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3CC 16792 bytes
font_01_sfnt_off0000dbe3.bin
822e16aeaa7d325a90df761b784eacdd04c720b769efd0f27fd69fb67c449758		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE3 10968 bytes
font_02_sfnt_off0000f55d.bin
3cf5d633b74e2bcb866ee29f1fa6a99b8b9d7c6023bbec5032aee572196da05b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF55D 16132 bytes

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