Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d7d3c067aba4dfc…

MALICIOUS

PDF

75.8 KB Created: 2021-07-16 05:46:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6f787376e6ac1fe8b55e1c63320fffc1 SHA-1: 9cf9d4d7b78613e501d59cc63c867207fe11b320 SHA-256: 7d7d3c067aba4dfc58a88dcd7fd1cd4d796573d210a28e8bf6f70f6626e0cec9
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as a phishing trojan and a machine learning classifier also indicated maliciousness. An external URI pointing to 'oniceh.ru' was found embedded within the document, likely serving as a lure to a phishing or malicious site. No scripts were extracted, but the PDF structure and embedded URI suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7703

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://oniceh.ru/square?utm_term=what+is+the+coldest+temperature+on+pluto
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7e00c8b0d544b6d7068c/1626111488594/find_product_by_sku.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7aa617e45264421f60560/1625795169605/87869894733.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7714e20af605120c133ef/1625780558197/what_is_the_6_commandment.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_off0000c736.bin
8e527d395916dee4789cd02b858ecd08fc8e824a19c97560e5c6a2e053789751		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC736 16688 bytes
font_01_sfnt_off0000f2a4.bin
75c58d3e7c75fd38a706fc5b0cc9783d2adcb8093b6eb1b740a6e0044ab1b51a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A4 10872 bytes
font_02_sfnt_off00010b96.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B96 16792 bytes

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