Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa3877ec6bb525d0…

MALICIOUS

PDF

85.9 KB Created: 2021-07-13 10:39:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 84eb60e399368e1e927905f04e707c8b SHA-1: 8a7e3f688ba63006388fcd4dfa44b2128f83968d SHA-256: aa3877ec6bb525d0b0df181c6a404a150eeb33d9d835f44d47483336ad891937
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains invoice-related language, suggesting a phishing lure. While no scripts were directly extracted, the presence of embedded URLs and the ML classifier's high confidence indicate malicious intent, likely to redirect the user to a malicious site. The ClamAV detection further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8440

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/pL_UGxDroB4/square?utm_term=ppa+meaning+energy
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e89229dad5c55fab73ab1a/1625854505324/funinezujumonedage.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7e9572e2584f2462be78/1626111637448/9356617456.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ecdee21c817c33f6cf3153/1626136290956/physical_therapy_standardized_tests.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ed3b5d36a7a57c1cf0d5d4/1626159965719/favevatirowefepep.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec791f40274373759564f3/1626110239893/pebemo.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7a20a5eabb22f35d78010/1625793034746/desawepufevituromireri.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_off0000f034.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF034 16792 bytes
font_01_sfnt_off0001084b.bin
c550e33ab0c2328adf53f95db16287f67fc2b24d54f292fa0cc1de0c5b4aeefc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1084B 10280 bytes
font_02_sfnt_off00011f57.bin
f4d883dba783dcb1c4e1630790c1924d3a0438fd4ab51fcb3856880f950f8140		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F57 16984 bytes

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