Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f4a49e1140617e4…

MALICIOUS

PDF

80.4 KB Created: 2021-07-13 17:04:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0bdc6e86096863134c0b4b468e35009f SHA-1: 2eae61f25822fddbd395d95789c3a94be9b22ae1 SHA-256: 4f4a49e1140617e4dd60cd5cdc272d6bd9499637e39828562dcbd6cead134b0f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, with a high risk score. It contains embedded URLs that likely lead to malicious content or phishing pages. Although no scripts were explicitly extracted, the nature of the detection and the presence of URLs suggest an attempt to redirect the user to a harmful site, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/AG-UZpNbJGc/square?utm_term=biggest+swamp+in+the+world
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e81046ce8457037ee4a8e7/1625821254180/diary_of_a_wimpy_kid_book_double_down.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8fd7dcc7c0864592570f9/1625881981348/6713081642.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e937d6b9b95949b65f7a28/1625896918619/jevivovapavitoveloki.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e91f72f107ff2467e903e0/1625890675224/gulzar_poetry_on_smile.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec8b0c0d838b6c850dc46d/1626114828196/jajulelow.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e85c0324584c54730b9f54/1625840643988/pc200_6_specifications.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec87bdb8cbe518df584c9c/1626113981940/is_code_for_building_construction.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e90d2937da2614570d612c/1625885993273/25544750737.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7e61828bb5f4f5163dc29/1625810456402/management_information_system_research_paper.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8f6358915684aa53b605f/1625880117408/51_letters_for_ielts_general_training_writing_task_1.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8d800c81c3e1fd72a3931/1625872385057/87978868134.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec71dc4c0b954f9ea26ceb/1626108380296/riluribewonopoxod.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec8b1d5978cb5ccaaba414/1626114845159/internal_strengths_and_weaknesses_in_strategic_management.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ed9d2a1608af7c639d3a34/1626185002249/loseneweses.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e789b095719b356d8e0ad8/1625786800631/lunagud.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8bdcc2b8982254c48dd63/1625865676768/nagisozeruluxuzopegexot.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec841d0cf33f708d7a808e/1626113053417/how_to_combines_to_make_one.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_off0000d8e2.bin
7e0880c0ca5ed9f6dd43d799ae848bfda4f136649d8b459d1405463afa98d227		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E2 16436 bytes
font_01_sfnt_off0001038f.bin
dcbcf4c4a3d8f2177575f01c9fde7d9969929b01a603d77b55e618ca03edbc9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1038F 10980 bytes
font_02_sfnt_off00011cb0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB0 16792 bytes

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