Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeb6c58be4b09eb1…

MALICIOUS

PDF

80.3 KB Created: 2021-07-14 06:13:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a2f9be64df7f7e687788c84d9f7e12e6 SHA-1: caea1b7201dff328cc94bfcf30573622f8cd61e3 SHA-256: eeb6c58be4b09eb1793be3815a31d98b80cb292c966240a6388cf62130b7dac7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains an embedded URL pointing to 'queure.ru', which is flagged as suspicious and associated with phishing attempts. ClamAV detection and ML classification further indicate malicious intent. 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 credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6171

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://queure.ru/square?utm_term=outlook+com+hot+mail
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e7ee971c6ee137fa118c56/1625812631510/download_little_pony.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60edb0ee8525735ba0d37c7b/1626190062684/64214583178.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7e8119a16f038d61d5e6/1626111617989/10000_won_in_rupees.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_off0000ca50.bin
2acd254be5dadee3df05cc5a78cbcc5f4e1f7ad67c86ac53cdf441a0eefddd3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA50 29832 bytes
font_01_sfnt_off00010576.bin
233f0f2a0605ff0ab1f0aa30f46e8a3f95523166af4e6803d792ddba1f54db42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10576 10208 bytes
font_02_sfnt_off00011c5f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C5F 16792 bytes

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