Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a683f76ee2878a9…

MALICIOUS

PDF

74.5 KB Created: 2021-07-14 00:00:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a34433a5edef820453ee71cd4443c108 SHA-1: 1332938c1b7ce772bc4391b6a9f19045af1dbcbd SHA-256: 7a683f76ee2878a923e318aa345ff160656f0183dd7ef25d7a610b58e7335565
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan. It contains an embedded URI pointing to 'https://philabc.ru/square?utm_term=the+other+bookshop', which is likely a phishing or malware distribution site. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious resource.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2592

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://philabc.ru/square?utm_term=the+other+bookshop
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec9b889cb57f380a79ca5f/1626119049049/gavitovupadijuvejed.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec7928668ba31612b4f82e/1626110248721/burn_after_writing_book_pages.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_off0000c67b.bin
2932d7839a51108d06be36f88587d7b091a6a3385c93740f52992d8fb56e5d7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC67B 16120 bytes
font_01_sfnt_off0000efde.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDE 16792 bytes
font_02_sfnt_off000107f5.bin
c8fbb583c1ec2a0418b5c080fc2582cf4693953979ca624e4e53e3c025829fcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107F5 10140 bytes

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