Malicious PDF — malware analysis report

Static analysis result for SHA-256 14f22c655e19775d…

MALICIOUS

PDF

73.7 KB Created: 2021-07-13 17:49:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f4b68e1f7c471a1546a8af750e6ca524 SHA-1: 09a85de5d9898ccf41da2ab672e080db4c97645f SHA-256: 14f22c655e19775ddda315bf1918070ecef4cd4c5b83fbad2f35c583a9ea2490
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the presence of an external URI suggests an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8028

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://nomylo.ru/square?utm_term=what+does+lp+stand+for+in+business
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7e2bb7e45264421f8fc38/1625809595576/coming_out_quotes.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e9043c2c5c2f6215c7dfce/1625883708200/23111201875.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8a15dfc91e4447a6360cb/1625858397665/dazojaviresivamofibunizu.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_off0000c018.bin
f0641993e216d1e62b1af72b0f193058b8ea294c0d6d7cad42205d0b2f512c81		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC018 10828 bytes
font_01_sfnt_off0000d8c5.bin
036ce63e814c726e6630f24b90ea514c7d84961b89f3945d7d7d667462ba95fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C5 16360 bytes
font_02_sfnt_off00010314.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10314 16792 bytes

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