Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dc399faf77ef068…

MALICIOUS

PDF

84.6 KB Created: 2021-07-17 00:39:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 808bbd5e689381f5d7b148ff3452192f SHA-1: 4b7589c419fdeef4512ad275eeadc6f3e1d8183e SHA-256: 2dc399faf77ef0686569838f7b43fbd87d52692dc8ba4d436f9497d0a07e2fc9
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by ClamAV as a phishing trojan. It contains an embedded URL that, while currently classified as benign, is likely part of a phishing lure. The PDF structure and ML classification further support a malicious intent, possibly to redirect users to a compromised site for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8083

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://feedproxy.google.com/~r/sq/ugae/~3/AG-UZpNbJGc/square?utm_term=incorporating+a+business+meaning
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f1a2623b20c96dbe6ec9ec/1626448482958/coordinate_and_subordinate_clause.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f1f47a01697f42df479742/1626469499075/dancing_with_your_ghost_chords_ukulele.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f1f8606ddefe7be86aca33/1626470496771/yellow_fever_and_dengue_fever_are.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f1f659bb001e09f08500bf/1626469978017/gusazod.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f0a45cd8abf20f85521de1/1626383452914/86720220666.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_off0000eac6.bin
aa8bc23b7f278e33c4354acbc7faa4de39fb921cdf8a66bf5af41d9834e671af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC6 16528 bytes
font_01_sfnt_off000115b6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115B6 16792 bytes
font_02_sfnt_off00012dcd.bin
517b0a00c2ea4623c3b289a54a71fa51a81f6a886e7c14889264c1fe886284b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DCD 10860 bytes

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