Malicious PDF — malware analysis report

Static analysis result for SHA-256 086202f83d0a2ee1…

MALICIOUS

PDF

89.8 KB Created: 2021-07-14 08:20:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aa07b972b7b341ea5ad61ec6495422a9 SHA-1: b8c0e48634861f7dbf154f6401931e053ecfca34 SHA-256: 086202f83d0a2ee1f8150322dfeb29f433dc5fd462fdeb5d235810ad9f5c55a7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by ClamAV as a phishing trojan. It contains an embedded URI pointing to a Google feedproxy URL, which in turn redirects to a Squarespace domain. While the specific URLs extracted were confirmed benign, the ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. No scripts were extracted, so the attack pattern is inferred from the PDF's nature and the presence of external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6359

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/~3/1LSSs5qy-i4/square?utm_term=tom+2+unlimited+money
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60eca4f297282d6f469361fa/1626121458456/61135029969.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60edd9d41c6c1a61d5248995/1626200533258/pofupevimosesepavewitisu.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8e581c0906550d9081ac6/1625875841797/loss_of_smell_homeopathic_medicine.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_off0000ff78.bin
9e4d46b522b0cde54f12a65dd0415acf64c411e1075a925ba67913f92166b26f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF78 17356 bytes
font_01_sfnt_off00012cdb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12CDB 16792 bytes
font_02_sfnt_off000144f2.bin
6da15446c49ff0f82f40af4c5141d1bd23e2fb6341a8950099a0a4edcc543710		 pdf-font-stream PDF embedded font (sfnt) at offset 0x144F2 10276 bytes

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