Malicious PDF — malware analysis report

Static analysis result for SHA-256 9af2df656581c0a9…

MALICIOUS

PDF

128.8 KB Created: 2021-07-13 18:22:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: aea8c50e126cb2142293483199aaf784 SHA-1: 95aa26ec19d74e1951bcf94c18c54fb54c648556 SHA-256: 9af2df656581c0a9d7f3e6960c77b166294fd7b01963c112e85dc47d90f884b5
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a phishing classification. It contains an embedded URI pointing to a URL, which is a common tactic for phishing attacks. Although the document body is heavily obfuscated and unreadable, the presence of an external URI and the ClamAV detection strongly suggest a phishing attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0948

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/cEZ-xJcQpFE/square?utm_term=mickey+rourke+first+plastic+surgery PDF link annotation
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7709ccba01e017d44252e/1625780380145/manchester_terrier_lab_mix.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ed51bafc46f1629a040bfe/1626165690355/how_to_upload_a_file_to_my_facebook_page.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_off000192e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x192E8 19348 bytes
SHA-256: 76bd06d3db49f6a6f3228e74749cfdbc5770f195d7dfd17b56c3042ae43af13b
font_01_sfnt_off0001c624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C624 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001de3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DE3B 10852 bytes
SHA-256: 58d3fd362a1b68aab38880e76e78b3fc3a12cd7172f53504b5001d181cf10980

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