Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea20680445caea90…

MALICIOUS

PDF

112.3 KB Created: 2021-07-16 00:05:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 66eeae57c549e2ec05d4571d09eaf735 SHA-1: 7bb421c44a903353980fd0bb1486d756bd721da9 SHA-256: ea20680445caea90e6a682bbe936937c5dd34806af298f50ddea8557b0100d3a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded URLs and was flagged by ML classifiers and ClamAV as malicious. The presence of embedded URLs suggests an attempt to redirect the user to a potentially harmful site, consistent with phishing or malware distribution tactics. No scripts were extracted, but the overall structure and heuristic firings indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7738

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/razvivatel/yapz/~3/v-xubMviL4Y/square?utm_term=ren%C3%A9+descartes+meditations+and+other+metaphysical+writings
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8c9a9351081123f7c2111/1625868714147/nirosuxilusotazifeked.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec8289fd54eb070825c324/1626112649594/about_giraffe_for_kids.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e9540b0cbdad4d35075a2f/1625904139904/reading_and_comprehension_worksheets_for_grade_3.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e927fde6a58043b691de57/1625892861363/accounts_payable_process_interview_questions_and_answers.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e7bc724aaab0286a892cc2/1625799794423/how_to_get_marker_out_of_jeans.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_off00015243.bin
0c6435195ef5d6dfa704a755b1992fe4da73ce3ff5901f7bf0195c4b10163316		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15243 11360 bytes
font_01_sfnt_off00016c60.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16C60 16792 bytes
font_02_sfnt_off00018472.bin
d06de8a2a8f8244e17ee17e3e1d5f42d1c8d3766a5ebd35e77b08ab2c0cecf48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18472 18428 bytes

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