Malicious PDF — malware analysis report

Static analysis result for SHA-256 eab5c9dd5b20038d…

MALICIOUS

PDF

81.1 KB Created: 2021-07-14 02:11:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 1f05d25f374349e451ccb4be79ae15a5 SHA-1: 4c8df48b571d93316d3c8a9d0aa06179c5a71786 SHA-256: eab5c9dd5b20038d28444f3db8fa3d10d867a1d4e43f1fc6b5ddbf26fc49551b
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ClamAV, with heuristics indicating the presence of embedded URLs. Although the document body is heavily obfuscated and unreadable, the embedded URL heuristic and the ClamAV detection suggest a phishing attempt. No scripts were extracted, but the presence of external URIs points to a likely attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier clean score 0.1467

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/kVSxLQpkboc/square?utm_term=how+to+properly+wash+white+clothes PDF link annotation
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee06c082b49873592e3cf1/1626212033101/puduxeduj.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e9446b2210ba6bce133c96/1625900139446/using_filezilla_for_ftp.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_off0000dd02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD02 16708 bytes
SHA-256: 018ff3ed717d5b85a9e71035513fcb19deacd54bd7afa597344e423dc4dad79c
font_01_sfnt_off0001086d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086D 10560 bytes
SHA-256: d2c7320f9bb44b308d1e3814711b917e724f265fe65d91ff15eb4bad51a0577f
font_02_sfnt_off000120bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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