Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aaa58c23862daf0…

MALICIOUS

PDF

80.9 KB Created: 2021-07-13 19:16:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: df0a72d475057d83ef9b37fd6c8adb7e SHA-1: 399dace550251007d66a77d673536329be036a24 SHA-256: 1aaa58c23862daf09cba7eb45ae9f1ddbdbee0fef34fb1bf9d8e53e35366f89d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing or trojan variant. It contains an embedded URL that points to a Squarespace domain, which is likely used to host a malicious payload or redirect to a phishing page. The presence of PDF_URI and EMBEDDED_URL heuristics further supports the attack pattern of luring users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8511

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/UZrB20b2Dcg/square?utm_term=cacao+70+eatery
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8fe2a5ebba154a8fab047/1625882154871/mudegowenuzukanade.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e93efeb630645a0ef849d8/1625898750434/34297758543.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ed244fbc85f73bac2496f0/1626154063233/buwobokibegamalitidavow.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec880fd0153e73bf8c556b/1626114063934/wubedova.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e9371483ae0c490239d440/1625896724218/chaps_and_fades.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ed90d2fb5306426ed0c6ed/1626181842865/getesasawinibafutirep.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_off0000de0d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0D 16792 bytes
font_01_sfnt_off0000f624.bin
8ad4d7b0992cf8bf66578db64f02d7c338e4f4dabacaef7e2a39398983cad756		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF624 10132 bytes
font_02_sfnt_off00010cff.bin
d3f871a3081675dae735fbc61b022882d29107a69139b90c044fba0291f036d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CFF 16624 bytes

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