Malicious PDF — malware analysis report

Static analysis result for SHA-256 f43c7acfb404afd4…

MALICIOUS

PDF

72.1 KB Created: 2021-07-20 23:14:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cfc32cd6672c41d8b2103be4923375e1 SHA-1: 94faee23409828f8239aaa927c32aafa305d81e0 SHA-256: f43c7acfb404afd472aa1e442d7347f8500dd773b61a62e8d16de8765aad0d51
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. No scripts were extracted, but the presence of the external URI is a primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8216

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=hiit+jump+rope+workout+routine
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f37858ce637c25833c55d1/1626568792468/famous_trumpet_instrumental_songs.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f466f1db752c5e49b6a333/1626629873952/pubg_mobile_performance_boost.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e801ab48fdc259404261e4/1625817515997/do_some_sharks_give_live_birth.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f0aede173c2b6f1e599c49/1626386142313/sbi_solved_papers_for_po.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f203cf2dca802cab77adaa/1626473423449/89221460334.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_off0000bcb1.bin
70a0d3339172636ac9a18284a8957e6d6750dc264f45181dfb5df1f511590952		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCB1 15732 bytes
font_01_sfnt_off0000e517.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE517 16792 bytes
font_02_sfnt_off0000fd2e.bin
6ab8f4fc74a255b6bb85fcb5f58a3ead7bdcbc2c02d2410b439b086cd00e0902		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2E 10436 bytes

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