Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fecf7b5043c3926…

MALICIOUS

PDF

80.7 KB Created: 2021-07-15 15:36:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e9a507b8f12c88302dc005740b29eb82 SHA-1: 33db3725035155d91dc2a4a463f50d5ae7c8b727 SHA-256: 1fecf7b5043c39261c40a488396b5643e8c77fd1309c53436b18683588b522f8
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that contains an embedded URL disguised as a project file conclusion. The ML classifier and ClamAV detection indicate malicious intent, likely phishing or malware distribution. The embedded URL is the primary indicator of compromise, suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6221

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/~3/7R6buoffwiA/square?utm_term=conclusion+for+project+file
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60efe71bbae8d04216d49d01/1626335003960/xusoxuvurokatunonetelepi.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e88be8d30a4d54f3fa7b00/1625852905102/razose.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e86f6e565c2358bf10997e/1625845614990/nijukofete.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_off0000da6b.bin
8e5dff34086a2049ecaa5078fdf49d0bb8c27a9fc453ca743225f9e19ab42f69		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6B 17112 bytes
font_01_sfnt_off000106cd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106CD 16792 bytes
font_02_sfnt_off00011ee4.bin
ca0380f7dbbc475536ef8aac247329010da5c8ff3c4dc908d41719eb6bf4ad2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE4 10572 bytes

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