Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf38dffb1dd61a01…

MALICIOUS

PDF

80.5 KB Created: 2021-07-15 10:14:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ff98eef0619b4893b48da1d704680924 SHA-1: 151d331982f368817e56b1c0b8b0043b2c690edb SHA-256: bf38dffb1dd61a011e6e6ff88064054ceee47770396e77eec455243377df1007
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to direct users to external resources. The PDF structure and embedded artifacts are consistent with a phishing lure, likely intended to trick users into clicking a link. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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/~3/4aHNpQc2m6I/square?utm_term=how+much+time+does+an+egg+take+to+boil
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ecc514929f7b3a9fe148ed/1626129684780/symbol_for_pnp_and_npn_transistor.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec7d1b668ba31612b561dc/1626111259239/statistics_and_probability_quarter_3_module_3_the_normal_distribution_answer_key.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7bbd37d3b385c94b41556/1625799636254/in_the_grapes_of_wrath.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee0849d9d5ad70ebd729f9/1626212426028/92301475705.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ed9e8146a7611a87cf95b0/1626185345383/best_lines_from_dead_poets_society.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e86cec131e486bf961e8dd/1625844972176/there_are_three_types_of_muscle_tissue.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e95c59787dde1a90afe3d8/1625906265121/66558827662.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8e12cc0906550d907c0d5/1625874732259/mibovuwideginetomujegini.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee5d35b1dcdf258da9c059/1626234165187/1_chf_to_usd.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ed7b036be96a4ec40ab9ba/1626176259938/roasted_fennel_seeds_in_chee.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e95e16dc37083541ba8a1e/1625906710856/5041632223.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_off0000d911.bin
c918a1456359dbe28e672c100c928c35966e046163628a0fcaa278fdbacb02d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD911 16724 bytes
font_01_sfnt_off000103fd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103FD 16792 bytes
font_02_sfnt_off00011c14.bin
5d8c43cb5fe7b16a36c6a402ba0a143087a9ad0069a4a871acac55bf6c1416fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C14 11128 bytes

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