Malicious PDF — malware analysis report

Static analysis result for SHA-256 b098bfad6d8ab77f…

MALICIOUS

PDF

75.0 KB Created: 2021-07-17 03:24:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1c3c347fffbdf0fcb455fddfda9921de SHA-1: 6402c13663682dea885d096adc7ed4ae09c2affd SHA-256: b098bfad6d8ab77f74532762e30cd1428622882e6f1462080f394f09cab3bdc7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains embedded URLs, one of which is identified as an external URI, suggesting an attempt to redirect the user to a potentially harmful site. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the ClamAV detection point towards a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9163

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/razvivatel/yapz/~3/0YvHz_IItD0/square?utm_term=things+that+rhyme+with+poem
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60efd113e00eb31d7cebf0c9/1626329363379/ext_meaning_script.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7ed1b8cbe518df574d12/1626111698094/how_to_clean_junk_files_in_windows.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7c43dadf2c26882ff7d50/1625801789687/prayer_before_the_meeting.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f2121dc375756552b13e8b/1626477085659/cover_letter_pharmaceutical_company_research.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edd2d32799685454f7cc66/1626198739898/goxizevolilik.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee6c622485902f3e76545d/1626238050150/49529298507.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f039df1e1165054c96be38/1626356191694/multiple_choice_test_taking_strategies_worksheets.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_off0000c2fb.bin
8fdc25256fe1bc46e4ca5706a29b3cd6df26631edcda1fb577b40fb5fd022cd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2FB 16848 bytes
font_01_sfnt_off0000ef1c.bin
822aaf6c02d3461b4191f155b776ac03433215674aa20da75079aeb2eeaa3421		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1C 10816 bytes
font_02_sfnt_off000107f3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107F3 16792 bytes

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