Malicious PDF — malware analysis report

Static analysis result for SHA-256 d40718a01a61b11d…

MALICIOUS

PDF

75.2 KB Created: 2021-07-14 02:50:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: a3081dbc957215aa68dc172652ede303 SHA-1: 80be981914a0bcd354e9298607c64d53b9257946 SHA-256: d40718a01a61b11da56d019efc8e423e22bc8a60b1c8a08bdca42df319056b88
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to redirect the user to malicious content. The PDF structure itself contains duplicate objects, which can sometimes be used to obfuscate malicious content or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3002

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/~3/4P1vZUbBa90/square?utm_term=the+largest+democracy+in+the+world+is PDF link annotation
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7c3904b964f05b84721c6/1625801617074/staffordshire_bull_terrier_for_sale.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7b70f28bb5f4f51616aa1/1625798415930/luxembourg_city_population.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2A5 10980 bytes
SHA-256: b99ba000a22cb661a3f478cc95a4c7782338557473afef09cda895e819c7a6ff
font_01_sfnt_off0000dbd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD3 16692 bytes
SHA-256: 01e7562b34f6fc8951b0402ee12838911191378afa3bd91a6b6919557b4200a9
font_02_sfnt_off00010761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10761 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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