Malicious PDF — malware analysis report

Static analysis result for SHA-256 905dc7bb399b9a1a…

MALICIOUS

PDF

73.4 KB Created: 2021-07-16 21:00:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8aedb35369e74282db787b9889fba717 SHA-1: 449013793a6b0e82a935c7c9459cea79be7417c6 SHA-256: 905dc7bb399b9a1a2b3099ddbe7d2f8a7893680212bd25535132e3b77689c5e2
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains an embedded URL that points to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF as malicious. The presence of an external URI and the overall malicious verdict strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7000

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://drafthe.ru/square?utm_term=animal+jam+journey+book+call+of+the+alphas
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8b1e2f4e84f053689d677/1625862627016/webipu.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8c23b9ffc3426e8a4401d/1625866811336/rurebufuvoditi.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec8ae34c0b954f9ea4e5be/1626114787461/society_and_the_healthy_homosexual.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f11dece7c78223958849a7/1626414572408/words_that_rhyme_with_passion.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_off0000c212.bin
76c39712d18356dde986f783c3640e85eec1fea5bddc635e0c9d91ed9372b8b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC212 14772 bytes
font_01_sfnt_off0000e734.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE734 16792 bytes
font_02_sfnt_off0000ff4b.bin
0b982ffddbdc64cddcbdd7ee2887cea3e05e573f6f7cbffdd2796615839c8d7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4B 11304 bytes

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