Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd0b0ff9634d73f1…

MALICIOUS

PDF

84.6 KB Created: 2021-07-18 22:57:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 91f3c14b86ca4f819a5b70865ff2ff34 SHA-1: 571b6ea79aeeab3135120a1e471dfddfd98c96e7 SHA-256: fd0b0ff9634d73f1e0f667de8b508c3801eb7ab5026af4d777029d0260cbbcd3
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a specific signature indicating it is a phishing trojan. The PDF contains embedded URLs that point to external resources, suggesting an attempt to redirect the user to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.1542

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/-MXWpcYQ7kA/square?utm_term=ap+calc+textbook+answers PDF link annotation
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ede2d13be50f2c5dae018b/1626202833142/countries_within_the_commonwealth.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f05814d8e413227d1f38e9/1626363924880/small_alphabets_a_to_z_worksheets.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_off0000e60e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60E 10676 bytes
SHA-256: cccd64f8b3c58a201a6105d5d45ad588cd41d583087ceed577feb20779c6362b
font_01_sfnt_off0000fea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000116b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B6 18144 bytes
SHA-256: 6b70cda8370b5e744caab2e64162a97689ba73cbd984aae44f12b0f756eb326e

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