Malicious PDF — malware analysis report

Static analysis result for SHA-256 11afcd0396c14b5b…

MALICIOUS

PDF

80.0 KB Created: 2021-07-18 20:34:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 063b61ff1aa8bfe647ba76deb687704c SHA-1: 1f0870e7b938156b6381487ef87f361869002cfa SHA-256: 11afcd0396c14b5b6a2c98edee8c42c9b592f6df634118a9ed5ad50ad97c048d
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ClamAV with a signature indicating phishing and trojan activity. It contains an embedded URI that points to a URL, which is a common tactic for phishing or directing users to malicious sites. Although the specific document body content is heavily obfuscated and truncated, the presence of the embedded URI and the ClamAV detection strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.1467

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/uzX87CUNjRg/square?utm_term=balanced+chemical+equation+for+magnesium+and+oxygen
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e7f9ba7e45264421f9e421/1625815482393/one_third_divided_by_one_half.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ed70ceb8016c0d1ad68bf2/1626173646602/html_open_file_in_browser.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_off0000d587.bin
124d5e9a91a4d8c29741568a8284c67b0150580500375bcac0dcb9373c066f69		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD587 16932 bytes
font_01_sfnt_off000101a2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101A2 16792 bytes
font_02_sfnt_off000119b9.bin
65ab03e5be779250dca9d28fcc71d098df08fa335dc37238d5af22b2199ccbc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119B9 11440 bytes

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