Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aa136c0ac91964c…

MALICIOUS

PDF

75.6 KB Created: 2021-07-15 10:41:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e76092b0cfdca986968d954641a58527 SHA-1: b45d930f1d6c5c5936eb97df0dd46414dfc34cae SHA-256: 6aa136c0ac91964cc89da565e4478f4efe1d8ae6bcd21acdec3f7dd57ffda3d3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains embedded URLs, one of which is a Google feedproxy URL that resolves to a Squarespace domain, suggesting a potential phishing or redirection attempt. No scripts were extracted, but the presence of embedded URLs and the nature of the detection point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9163

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/jEScUJLm1bs/square?utm_term=another+word+for+scrutinise
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60efe54a36870d1a2db63dba/1626334538224/honor_in_beowulf.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60efc9d997dca740078b999f/1626327513629/spo2_meaning_in_english.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60efcebfe9d3bc6103fb8ff2/1626328768020/gupikipefuzigukifudu.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60edceea3e01114371268607/1626197738677/smarten_up_meaning.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60efd0191e1a563dfb8bed14/1626329113823/pofititirusomuw.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e805b023621b4743e5a261/1625818544924/kidopuzu.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e92277aa30721e65ef2fb9/1625891447841/friend_never_answers_phone.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_off0000ca13.bin
e22db7da402d72dcbcdd13f3459288ee392028fcab1cbbaaa5cec9b78dee1cc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA13 10532 bytes
font_01_sfnt_off0000e21c.bin
aed9d87f5079bcfe88f5ca811fe9273102c7773c3c5f8fc289b031f6a937d78d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE21C 15692 bytes
font_02_sfnt_off00010a44.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A44 16792 bytes

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