Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c1fde85fafb1660…

MALICIOUS

PDF

76.5 KB Created: 2021-07-16 02:27:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 611d81e4347d46ad0940e6add7ff40dc SHA-1: 2cb620f4adb3926e3d76a9707db608efed9b62b7 SHA-256: 0c1fde85fafb1660c70fda7dd959e1885fe82b6b809978d545adb8b49dd37752
96 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by both ML classification and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs and the nature of the detection suggest it is designed to exploit vulnerabilities or trick users into downloading further malicious content. No scripts were extracted, but the PDF structure itself is suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9163

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/razvivatel/yapz/~3/UQ8tT55rDuk/square?utm_term=manchester+nh+activities
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8585b11c0266d44ad2bed/1625839707135/fomido.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec8861ff9c8b53cea2ed21/1626114145467/64304497592.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f0c421c825a553dfeefbee/1626391585884/sidixepid.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f0944cabe2f010046c3b02/1626379340475/present_simple_and_present_continuous_powerpoint.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7d1bbafd06e4982ea0003/1625805244005/tools_and_equipment_regularly_to_identify_defective_ones.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60efe4d63a4e3014a1c1baa6/1626334422163/goded.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60efd221bae8d04216d3da1d/1626329633505/3.2_kg_to_pounds.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_off0000cc3c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC3C 16792 bytes
font_01_sfnt_off0000e453.bin
518a67178ad0bd047b8e88b9d12f0ad853161f0755526c6ec40b683bbdd1abe2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE453 10220 bytes
font_02_sfnt_off0000fb32.bin
92dfd2c62d807a01cca4100aa28bdb0c787629b9923204a41f468cd658d52acb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB32 16560 bytes

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