Malicious PDF — malware analysis report

Static analysis result for SHA-256 2501daf78078acc7…

MALICIOUS

PDF

79.9 KB Created: 2021-07-13 22:46:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2192435aadca08ef928fd150f4dc2266 SHA-1: ae737bc48ef3dcf47c19587161606233b546a242 SHA-256: 2501daf78078acc796a53d583ac5c75e1bff9ce84446b971079f0d2c81db83be
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of embedded URLs, even those initially flagged as benign, suggests an attempt to redirect the user to potentially harmful content. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and heuristic firings point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8365

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://feedproxy.google.com/~r/sq/ugae/~3/HbdJGeoIq_s/square?utm_term=example+of+allusion+in+romeo+and+juliet+act+3
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed3d4aaf5561712123a87a/1626160458809/merge_jpg_images_into.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e771b73bc03b46d747caca/1625780663383/is_melting_exothermic.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e7d29cf4d7c53d8b12e9ac/1625805468626/nevada_small_claims_court_limit.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8bde70c10021855970cf9/1625865703601/wojibolabulagaze.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e92aab92abcc18c4f6598f/1625893547577/7859688166.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_off0000d4fb.bin
7a02ec9b897ff9cd8c5d143a9f8371afefc83f7a18f25d2e2b0332b842e24eeb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FB 11268 bytes
font_01_sfnt_off0000ef67.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF67 16792 bytes
font_02_sfnt_off00010779.bin
cf4a335c19c887acbed8dfc1ca240354076e9738354784173568dc925130b804		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10779 16752 bytes

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