Malicious PDF — malware analysis report

Static analysis result for SHA-256 d239eb90b87262b1…

MALICIOUS

PDF

79.8 KB Created: 2021-07-17 12:05:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0d598617097926823f596ac1e2b6db01 SHA-1: 484b99dd101ef7189d055834160a0cd84c3a716e SHA-256: d239eb90b87262b136153b9702c10fda94338eb54238f426aedabfe512edff63
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to redirect the user to potentially harmful content. No scripts were extracted, but the PDF structure and heuristic firings point towards a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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/gPkW7oTCsL0/square?utm_term=basic+facts+about+the+united+nations+pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8a177cfc83862d32ae816/1625858423129/laruwuzorogodogufewejodig.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee5fa1b82b304768628b35/1626234785457/90841848572.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f0d3b021e37b5b0f364ce3/1626395568886/best_twitch_chrome_extensions.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60efea574063550b157b5adf/1626335832146/79503092640.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f0a1806e1f7e2d59ecdd51/1626382721124/wopawitisoku.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee836deed6cd77ab65c2d4/1626243949259/the_enthalpy_of_combustion_of_h2_cyclohexene.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee26536d75c50a5d421c4b/1626220115847/tuvavusunez.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ecd2d8a9c2f82f78352bca/1626133208443/pink_we_could_have_it_all.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f0c0cc4af6cf0f378915dd/1626390732605/14153435207.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f092478453982291498781/1626378823913/fundamentals_of_digital_circuits_by_anand_kumar_2nd_edition_free_download.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f22408fb6d8f5e804bf88f/1626481672212/ternary_operator_in_java_with_multiple_conditions.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_off0000d781.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD781 16792 bytes
font_01_sfnt_off0000ef98.bin
8b78c6730d83e53e06fd8498fed9ae794f601e55826c0c4c797a871a10230a21		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF98 10864 bytes
font_02_sfnt_off00010874.bin
34e61eb6b4f700dc028ba3448c55c77c3683051e0e799ab606da76c61430de6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10874 16360 bytes

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