Malicious PDF — malware analysis report

Static analysis result for SHA-256 9536e6771cde2357…

MALICIOUS

PDF

76.2 KB Created: 2021-07-20 01:26:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 7363264f813e392e9f25e20c9acce872 SHA-1: fab2a94293af2b40348f4d047373032d8b8632bd SHA-256: 9536e6771cde2357053f1b793f6d31c3fd4a1208b22455ec01c5c9fc09bb071f
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing an embedded URL, identified by ClamAV as Pdf.Phishing.Trojan. The embedded URL, https://feedproxy.google.com/~r/sq/ugae/~3/rCno-htTzZk/square?utm_term=nyc+department+of+labor, is likely part of a phishing or social engineering scheme to trick the user into navigating to a malicious site. No scripts were extracted, limiting the analysis of the file's direct actions.

Machine Learning

  • Nyx PDF Classifier clean score 0.2489

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/rCno-htTzZk/square?utm_term=nyc+department+of+labor PDF link annotation
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60edc22b9779423221dcd54e/1626194475525/pegarifirumipenivewenexar.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ed8aaf43ec04194fd983cf/1626180271322/computer_will_not_open_files.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_off0000c4e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4E1 18120 bytes
SHA-256: 2c3703c3edab856081926a17b853fdb095b601201f619d55c4db7a2ca7a493d2
font_01_sfnt_off0000f4d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D7 10752 bytes
SHA-256: 00352fc73d1b35ddc306d65ea9f8e670d1db5a0dc4657997c8c2f20874d04857
font_02_sfnt_off00010d62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D62 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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