Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ed94ec46afa5929…

MALICIOUS

PDF

91.9 KB Created: 2021-07-13 16:44:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: da69b78763343493e1d99f432473b3d5 SHA-1: 7c8442a224e96acde435bf66aa3b26a0113a74e3 SHA-256: 4ed94ec46afa592915d470148e5336938c80b92f5e8faf39a90b0058aad66b92
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to a suspicious domain, likely used for phishing or credential harvesting. The PDF structure itself does not contain readable content, but the presence of external URI firings suggests an attempt to redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5959

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://ketchas.ru/square?utm_term=the+real+banquo
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8edf8cc7c086459248905/1625878008160/1413473137.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8d502a15ec47e081864c5/1625871618851/types_of_grass_burrs.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec9d92e0784948549ad77e/1626119570114/88677011363.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e86774217a573485499ce4/1625843572823/policies_and_procedures_manual_sample_for_a_medical_office.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_off0001054f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1054F 16792 bytes
font_01_sfnt_off00011d66.bin
3cfd3d42e70013bbb4e3182cfcdcd30e8ffd6a36721cb1c5795f4a5e4223c59b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D66 10196 bytes
font_02_sfnt_off00013422.bin
19318ccdedf934c98f80475656bdc41edbe47193929905d51d7cb0a3e590c706		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13422 17956 bytes

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