Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2987e4f26ccbe2e…

MALICIOUS

PDF

81.6 KB Created: 2021-07-16 03:49:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c9ed7fd5b3404eb60f801343710f598a SHA-1: 75303a3c03713c552b1e511ca31af289f3dc57c3 SHA-256: c2987e4f26ccbe2e4822f0df924b53ffd49238a60a9eba1f254f93cfde73d345
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. While no scripts were directly extracted, the presence of an external URI and the overall detection suggest a phishing attempt designed to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6221

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://nomylo.ru/square?utm_term=c5h12o+ether+isomers
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e851cafd08905cf2062498/1625838027309/37834386334.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e7d1324aaab0286a8a325c/1625805106413/for_in_arraylist_java.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee1170796bb0196c5e42e1/1626214768376/zolakidisebo.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_off0000dab1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB1 16792 bytes
font_01_sfnt_off0000f2c3.bin
6b24328f8f6dd9dc8928a042f7f3e5079fa860950274b3e1cb97a73993f56da4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C3 18496 bytes
font_02_sfnt_off0001233a.bin
096dced334978a13f2b3596308cc6c34eefd8d70b9823c099b6561544a799eff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1233A 10400 bytes

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