Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d06506e86c888c9…

MALICIOUS

PDF

76.8 KB Created: 2021-07-13 17:18:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b892dba210bc3bad34afe253e8aa0211 SHA-1: c2fcdc3a87b0614d183e2bc90bebdac85dd296d4 SHA-256: 5d06506e86c888c9987bfa27ab19cc018244f449f61aec6f4547b56800ea3ae0
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, specifically one pointing to a Google feedproxy, suggests an attempt to redirect the user to a potentially harmful site. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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/~3/5JeRQhMeIYg/square?utm_term=reasons+for+hypoglycemia+in+diabetes
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec7abfdcef4a49b3a9efe5/1626110656158/fivokadesibekefexujuse.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed8b24c2ef2d11c8d7c240/1626180388844/all_unturned_vehicle_ids.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec81b554a52c186ce4c7ca/1626112437462/the_lateral_surface_area_of_cylinder_is.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e9383de51f1f218d6ac4b8/1625897022086/36766406425.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7a2d35c13cc4fede78fd9/1625793235481/convert_colour_to_black_and_white.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e79a2ded7e630439604a55/1625791022075/72364077242.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e91d77f492d21a0f6ac54b/1625890167924/dragon_ball_xenoverse_new_update.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ecb5476e24b670b59639f7/1626125639613/6763700483.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed1367fc46f1629a015e82/1626149735166/the_iroquois_people.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc11.bin
a19150e52cac6e6e187b6cbbdd1a09ae1b004b6f0b872910390b49ca08406cf8
pdf-font-stream PDF embedded font (sfnt) at offset 0xCC11 15700 bytes
font_01_sfnt_off0000f47c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF47C 16792 bytes
font_02_sfnt_off00010c93.bin
b6ed47467204559fc7b9b4c9185c532ae1f7d59ef0e8139ab38a2cf9075c8104
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C93 11364 bytes