Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2d74c7614387377…

MALICIOUS

PDF

76.5 KB Created: 2021-07-17 17:56:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 30a6990538d34ef5897c000d955f20cc SHA-1: 7be65e768dcd3904b4ac9551f45052a4495fa3b2 SHA-256: b2d74c7614387377016c8892f1d83998166911ab6126d3c2351e61c58a4e6dac
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing attempt. The presence of embedded URLs suggests the document may attempt to redirect the user to a malicious site. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest malicious intent, likely involving the exploitation of PDF vulnerabilities or the delivery of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7746

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/razvivatel/yapz/~3/UkUWPC8UKDU/square?utm_term=k+in+newton%27s+law+of+cooling
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec9deec81c37306b3138f6/1626119662605/252322947.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e90ebf2210ba6bce116b24/1625886399262/sudagatepojorada.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee74db64675e3b9de487bb/1626240219973/58148440233.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e77ddcab214735a08791cb/1625783772265/22362643250.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_off0000c7c6.bin
abfe6abb98980e392f6f7ff601e8af8376f852f2168bc2929891a561fb08d2b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7C6 17400 bytes
font_01_sfnt_off0000f5c5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C5 16792 bytes
font_02_sfnt_off00010ddc.bin
e3e4d82a89dda5866defedbf9a09efca0f9fa295ba63f5549fe2ed72bdb321ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DDC 10524 bytes

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