Malicious PDF — malware analysis report

Static analysis result for SHA-256 f102a3dbb664a970…

MALICIOUS

PDF

80.5 KB Created: 2021-07-16 18:37:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 91008633bfa65b86b1c2a05fc3766670 SHA-1: 3ccdc4e2c9f3b123545b48ef65aecc3fdc4c0bb3 SHA-256: f102a3dbb664a970ddbf3b0b2a5e6f77e5554cf66bc289e22ca868c70fae5899
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and ML classifiers, indicating a phishing trojan. It contains embedded URIs, suggesting it may attempt to redirect users to malicious sites. Although no scripts were explicitly extracted, the nature of the detection and the presence of URIs point towards a likely attempt to lure users into a phishing scheme, potentially via embedded JavaScript or other exploit vectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6166

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/pL_UGxDroB4/square?utm_term=sexually+aroused+girl PDF link annotation
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee43fbfc191471fc6cfe8a/1626227707698/estimated_tax_payments_2020.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f14f892c92ee1ddddf6c88/1626427273881/51870031705.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec897254a52c186ce5a7f2/1626114418857/giwukijatizasavutepudesig.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed27dcb1b13d3c3c0ea48b/1626154972467/demizola.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_off0000db60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB60 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF372 16552 bytes
SHA-256: 7b99deb506c0aa91159a4c826ca65626536a448cc23394e332f00df1cfe1a852
font_02_sfnt_off00011ea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA7 10612 bytes
SHA-256: 27c508d653801b27ba15be5a7258c54de5bed39715f1ea162d403855a74dad9d

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