Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e9110a116fba0df…

MALICIOUS

PDF

75.4 KB Created: 2021-07-19 12:35:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4f01940b432650beae6af350af5e5df3 SHA-1: df5c8c609fe7180655d3a5a904accc4ea48e1db9 SHA-256: 8e9110a116fba0df92d66fd0551fb443fd70a5d3d9c96a582cfdd97749f742a9
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature, indicating a phishing or trojanized PDF. An external URI was found embedded within the document, which is a common technique for phishing lures or directing users to malicious sites. While the URL itself is marked as benign, the overall detection suggests malicious intent, possibly through obfuscation or a secondary payload not immediately apparent.

Machine Learning

  • Nyx PDF Classifier clean score 0.2489

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/qQn0o4eTdIQ/square?utm_term=let+me+tell+you+a+story+before+it+tells+itself
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eca6c2e0914637f38e4d0f/1626121922263/48273072759.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f335f329712869f065b267/1626551795502/kiborob.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_off0000c537.bin
1af8c93cb7b81c7dce51d49ca77077075eb1efc19188ee1c7f230937addb769c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC537 10584 bytes
font_01_sfnt_off0000dd6e.bin
ba18434e4d6c7e68f798b111252c3c42a1650b06d0986f6941a6b631c4d7c6dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6E 16792 bytes
font_02_sfnt_off0001099b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1099B 16792 bytes

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