Malicious PDF — malware analysis report

Static analysis result for SHA-256 c23f966cf97c22f6…

MALICIOUS

PDF

78.1 KB Created: 2021-07-16 06:41:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dfe22923eb3ddc07f967a194c6530726 SHA-1: da3f0f3b3a556c35f79b402000857f2b2196d2a4 SHA-256: c23f966cf97c22f60b3711de06496cbe521d131f922a6a3fec3923ddfa934c5d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing attempt. The presence of embedded URLs suggests the document is intended to redirect users to malicious sites. No scripts were extracted from this sample, but the overall structure and detection indicate a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8755

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/CHqDoFjlE84/square?utm_term=irl+text+meaning
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f0c7159b6f23611951401d/1626392342061/87620309994.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee3d6cfb3cc800db55736a/1626226028655/44808950531.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec993e4f558d0bf39dc72c/1626118462983/ambitious_in_tagalog.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60eda4dcc48108232e45a3ef/1626186972567/rulakagofavamaboti.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60edd78cea8d40126a1b448c/1626199948578/the_principles_and_standards_that_determine_acceptable_conduct_in_business.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee6a3d9c71001bedf89b42/1626237501970/charmed_series_watch_online.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f0a77beb563320f92ec59a/1626384251709/how_long_does_it_take_to_do_a_law_degree.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_off0000d032.bin
c7698aca0b9b14218bd390407e87bbb6ef383ab77e1261a76996f1305ac05d86		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD032 10216 bytes
font_01_sfnt_off0000e70b.bin
fe4173111d6bc8033e7c7ccff37f66975676aca2141abc38c653047b13d64688		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE70B 17428 bytes
font_02_sfnt_off000114a0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114A0 16792 bytes

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