Malicious PDF — malware analysis report

Static analysis result for SHA-256 91f42f1739eee3a4…

MALICIOUS

PDF

82.0 KB Created: 2021-07-18 01:33:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 42e3f57874a15833a1770672fbb67653 SHA-1: 522e8373e8d03df2b03b64743a516039280eb256 SHA-256: 91f42f1739eee3a42a4c0ddacce1ad93b17f99708bd5ddb0483a1c23b4e762fe
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by both ML classification and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, although currently flagged as benign, suggests a potential for phishing or redirection to malicious sites. The file's structure and detection by ClamAV as 'Pdf.Phishing.Trojan' point towards an attack pattern involving social engineering to trick users into executing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5817

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/v-xubMviL4Y/square?utm_term=how+many+calories+in+champagne+glass
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f306d36678663e6a2c7362/1626539732084/transformers_earth_wars_unlimited_cyber_coins.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e83eead11b4c60cfc55c0c/1625833194913/204152939.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec8b74668ba31612b6d379/1626114932130/pamusexu.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e7776a6a360c44743c80a4/1625782122578/kevotalogufaxekivafirab.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_off0000db70.bin
bfdd3e0275490fd463b7768e694c8885fe11aba42262025b479310a13ce58a90		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB70 18072 bytes
font_01_sfnt_off00010adc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10ADC 16792 bytes
font_02_sfnt_off000122f3.bin
725e7a7f4fd38611bbda7e72d54f576a38595811551cf350f80e9fa59789e7a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122F3 10916 bytes

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