Malicious PDF — malware analysis report

Static analysis result for SHA-256 b233e515c0e0a4fd…

MALICIOUS

PDF

77.0 KB Created: 2021-07-13 17:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 1e7de94a0a09d954c520dd49bcfcc87a SHA-1: 0f0fe05e180097cc45cb5aff10d1d338cb4b672f SHA-256: b233e515c0e0a4fdcc43f710fb31552f6005046105b2ae9ce6b9d8cd0ad0dfc0
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ClamAV heuristic 'Pdf.Phishing.Trojan-d2528dad23a95d95-10044376-0' strongly suggests a phishing trojan delivered via PDF. The presence of embedded URLs, although marked as benign, indicates the document's intent to interact with external resources. No scripts were extracted, limiting the analysis of specific execution methods.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2580

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/AG-UZpNbJGc/square?utm_term=the+honorable+marcus+garvey PDF link annotation
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ece73cf9a98d6db3a6979b/1626138429096/79766522805.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ed87722ae47d2ac92404a3/1626179442144/vnd_to_euro.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c92b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC92B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE142 10872 bytes
SHA-256: 26be5f42b09e9871e91331dda119494ce1a1837cb38a1cdc427dd1a709989e3e
font_02_sfnt_off0000fa31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA31 17168 bytes
SHA-256: ea8884d73f5136b04cc36152c64bf7f2ce7d6383c447c7b081f4dab12d50ff5a

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