Malicious PDF — malware analysis report

Static analysis result for SHA-256 94b5222477e00904…

MALICIOUS

PDF

84.1 KB Created: 2021-07-13 21:06:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cd80f3938c2b9c4ad27f7dcf05dd6b92 SHA-1: f952ab2683cf21da499d8e64aa8be550b93a137a SHA-256: 94b5222477e009049d54e9c2852fd14e8bcefd9b682a22ca422320c02fc492f5
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by ClamAV as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to trick the user into visiting a malicious website. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of the malicious URI suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8440

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://crysiq.ru/square?utm_term=moving+charges+and+magnetism+neet+questions+pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ecee498c96c6301f8e3017/1626140233076/hepatic_artery_infusion_chemotherapy.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec86c7d0153e73bf8c319f/1626113735572/flyboys_viewing_guide_answer_key.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60edae585dd1eb1c290847ff/1626189400620/hacking_for_dummies_4th_edition.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec99529cb57f380a799838/1626118482337/dozabozunibesurupotibivud.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7e7884454ab0ddd866f41/1625810825009/2_files_in_one.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e93a24563c1506a8b6e470/1625897508886/56158497857.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_off0000e396.bin
05c9777e77c1bf9bcf56c4911c47367c1b07ec008d7e6b79f3a615a09308f743		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE396 11324 bytes
font_01_sfnt_off0000fd9d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9D 16792 bytes
font_02_sfnt_off000115af.bin
711a731dba3551b516a5b32fb733bd7b15746e4a964374ef60d0725e95664862		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115AF 17624 bytes

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