Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb454a754ec4e2c1…

MALICIOUS

PDF

75.4 KB Created: 2021-07-14 00:06:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d4f4d22e71cc20507d864f10e2b3d3a4 SHA-1: b789995965e3c53d5366d5ed8bcd39db49689f2e SHA-256: eb454a754ec4e2c10de603d6b828d70d6178043c81d2f88b45d5ba775b1f7da4
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by ClamAV as a phishing trojan. It contains an embedded URI pointing to a Google feedproxy URL, which in turn redirects to a Squarespace hosted PDF. While the direct URL appears benign, the overall detection and the presence of an embedded URI suggest a phishing or malware distribution attempt. No scripts were extracted, limiting the analysis of the execution flow.

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://feedproxy.google.com/~r/sq/ugae/~3/AG-UZpNbJGc/square?utm_term=best+free+ad+blocker+for+android
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edd9bca9d1f62037e23692/1626200508481/high_cervix_on_period.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec9a920f7d8d50062dea9f/1626118802107/3048699682.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edec98930ff80baa0d85eb/1626205336739/55106205259.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edff3dcc8e436e4668daa9/1626210109444/millipedes_in_plants.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_off0000c47d.bin
1470196c50ac1a8f58bffd1a2bcfeefe83ab9533fdf780e8c3226b2afb692681		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC47D 10752 bytes
font_01_sfnt_off0000dd5c.bin
c47a3a6bdad9cbd4e21a947c962bb66f8a1e893234a0cc98204a037b866cf304		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5C 16412 bytes
font_02_sfnt_off0001081d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1081D 16792 bytes

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