Malicious PDF — malware analysis report

Static analysis result for SHA-256 de790f6e53fb13d3…

MALICIOUS

PDF

92.6 KB Created: 2021-07-15 12:14:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: ccd75ff268d6d23403bcea118791fddd SHA-1: 06756bb25429419df6b1758f0228ddaaebe966f7 SHA-256: de790f6e53fb13d3ff90e6a739700e925ff8ee39bf8ccf8c856ca63dac78d498
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. It contains embedded URLs, one of which points to a Google Feedproxy service, suggesting a potential redirection mechanism. While no scripts were explicitly extracted, the presence of embedded URLs in a malicious PDF commonly indicates an attempt to lure users to malicious sites for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier clean score 0.1792

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/ZFaGRQ6RLlg/square?utm_term=to+swoop+meaning PDF link annotation
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60edb8f2b564270cd6ebe4ad/1626192114309/41821710495.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e95c935ebba154a8fe2c65/1625906323239/bukikabopinisenuv.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7a2d35c13cc4fede78fd9/1625793235481/convert_colour_to_black_and_white.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB64 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF375 16544 bytes
SHA-256: 5781143603d41abfe8a0f932b8551060d7673e4cd68ada8409f7d0b2e828db42
font_02_sfnt_off00010ab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB5 21356 bytes
SHA-256: 876d020924525d4a5ccfaff5bf6a85ffcdd0b98d6f073953250108aec9e6a055
font_03_sfnt_off00014082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14082 10400 bytes
SHA-256: 8e1ba6a10b29a7e72bab30964853445408b8c790b44838478df398a655a68ad8
font_04_sfnt_off00015811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15811 3028 bytes
SHA-256: fab8a9d7da21e7eecb1bfc8e4b95c5d0def4f2ca2dd3949ea928634656ea4d6d

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