Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9225fc0e460fbba…

MALICIOUS

PDF

72.9 KB Created: 2021-07-14 04:27:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 968c78bbeb3a62dcc38d54af6b8fbcf2 SHA-1: 45e66eab208b541f32a66d3991dadd4b3d4d895f SHA-256: b9225fc0e460fbba0957e149a6a61b91adf7621c3392cbaa1c89154b8be3e6f0
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged the PDF as malicious. The presence of an external URI suggests an attempt to redirect the user to a malicious site, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6403

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://coretry.ru/square?utm_term=mastering+the+world+of+psychology+6th+edition+pdf+free PDF link annotation
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec7910dd2ac847ff7d8d80/1626110225136/pre_blessed_food.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e80a511c6ee137fa12afa2/1625819729591/64799888022.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8ebd1f492d21a0f6865fd/1625877457357/xedefoloxifol.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_off0000ba80.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA80 16792 bytes
font_01_sfnt_off0000d292.bin
f35fc59af740a92b0f3b9b8ee178068fb0ad578bb01ea9a81b27a1e58bed6317		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD292 16244 bytes
font_02_sfnt_off0000fd1e.bin
7669d5dadc734c4faf598346a1f1a8e91a4b2c49b924d437fc81734d2921ce1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1E 11260 bytes

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