Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdd2f939e5b4da30…

MALICIOUS

PDF

77.4 KB Created: 2021-07-19 07:56:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5991676bbd8ec99e53d26ae836ae21f4 SHA-1: 939c491e78901e0a626c712b2d89e2bd2c0d0145 SHA-256: cdd2f939e5b4da3043a6015b74bf11cd00565e464a623b400288946cd84ecc94
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing attempt. The embedded URLs, though some are marked benign, suggest the document's purpose is to redirect users to potentially harmful content. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9163

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/~3/5VO7y1TeAqQ/square?utm_term=how+do+i+remove+my+phone+from+safe+mode
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f4deae1ad9bf1c32c66766/1626660526482/vilimegokixurebul.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec92dde07849485499b9c5/1626116829912/lejosajexet.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f4e8d5c0fa6a1644f159bb/1626663125584/ikm_questions_and_answers.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e95f6e3ba7d954d547f38a/1625907054215/32130912482.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f3392e503a216717904d04/1626552622468/8848949438.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f0b93bf8ef4e01cd563748/1626388796074/dujexef.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f0892975b80b2ea8f108cc/1626376489241/example_of_reprimand.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_off0000cc4d.bin
7c3b6220b34f6c4721e6342ec7b64fe2bc627b7cde079d12144c8fb6a163c430		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC4D 16308 bytes
font_01_sfnt_off0000f6ae.bin
cdc2b925b189c5901b81e09d77d813c1bf3efd49e7f9f3bef57f0ff441148d4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AE 10876 bytes
font_02_sfnt_off00010fa5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA5 16792 bytes

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