Malicious PDF — malware analysis report

Static analysis result for SHA-256 ead89c117a0f5175…

MALICIOUS

PDF

92.0 KB Created: 2021-07-15 11:15:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b51bcd55cb8ffad13f13d4aa1230c8f8 SHA-1: 973052ae9385aed71dc938c412e489f9a9f5968f SHA-256: ead89c117a0f5175dd2cebde375cd31f6d1398bd7623ea16cf7f80beef0254dc
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://crysiq.ru/square?utm_term=i+hate+my+body+song', which is likely a phishing or malware distribution site. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the malicious URL strongly suggests a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8343

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=i+hate+my+body+song
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed9dcac8cbd011b90be00b/1626185163091/english_class_12_last_year_question_paper.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee3378e03b615e098d87db/1626223480666/folding_bench_and_picnic_table_combo.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e81b4169e16759cf7823d6/1625824066040/30190382848.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e80a9ad93aeb546a166e3c/1625819802944/bday_quotes_for_son.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edc62b6d720f75fb5e02a5/1626195500061/51035707006.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee01e0f6d8087912c27669/1626210784164/82849183544.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_off000107c4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107C4 16792 bytes
font_01_sfnt_off00011fdb.bin
282e758c4f09dd3d28df4709c6f206da1ea44b04d43b4f7491e1447046f024f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FDB 10660 bytes
font_02_sfnt_off000137eb.bin
f1c372983591cdc651f8da253363619dbfbacb789e1d58a9586a79b7d01cff6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x137EB 17164 bytes

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