Malicious PDF — malware analysis report

Static analysis result for SHA-256 e16621cbac4236fc…

MALICIOUS

PDF

81.1 KB Created: 2021-07-14 07:13:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 64d16e27169ed3ad90260cb9b17ae7b7 SHA-1: 521b427459fd46af064874cfbe30eb6bc8642752 SHA-256: e16621cbac4236fcae420065d176bd69251c5416b6f0bfed40f3ec70ae56c8ad
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged the PDF as malicious. While no scripts were directly extracted, the presence of an external URI suggests an attempt to redirect the user to a malicious site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5948

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://allytemp.ru/square?utm_term=autumn+leaves+fingerstyle+tab
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ed4342f67381323ef58f2b/1626161986343/78293670712.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee07bc4ff81d3e281895dd/1626212284487/trillionaires_of_the_world_list.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ed9baac48108232e44c3f0/1626184618450/jawajojuzofanaj.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60edc1fc7ce58f02ed90c02b/1626194428738/gta_5_skip_verification_apk_android_download.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e94ac5b9b95949b66001cc/1625901765905/how_to_export_multiple_sheets_in_excel_to.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbc5.bin
7a8c46827b4644e7dc26c59dc2de2da3006bd303f1037faf396cb95d026c61b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBC5 17668 bytes
font_01_sfnt_off0000fad3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD3 16792 bytes
font_02_sfnt_off000112e0.bin
ea9ac1529718fb82870b462554c7e22bfb5d7512c0c42c884737d953171ba8f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112E0 2536 bytes
font_03_sfnt_off00011dbe.bin
a8a2a7dc71ecec5031329d2acfc78e0703408524ada1b70b397fbbdb1b79ec56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DBE 10840 bytes

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