Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4b6b1fb35c8dff3…

MALICIOUS

PDF

78.8 KB Created: 2021-07-21 01:45:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2507bc3638701ee856352a47e1ce65f4 SHA-1: c2445b6746f403e7771e4cbdda1bd0a48bcd040b SHA-256: b4b6b1fb35c8dff3030ba50698a5f05fd34536b00053dd1c11dd9037eb953c9f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URL pointing to a suspicious domain, identified by both heuristics and ClamAV as malicious. The ML classifier also flagged the document with high confidence. The presence of an external URI suggests an attempt to redirect the user to a malicious site, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8439

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://coretry.ru/square?utm_term=code+breaker+challenge+answers
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f157dd1c98e64adeea6d63/1626429405332/after_bsc_computer_science_which_course_is_best.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f474a481f38b20589284ec/1626633381045/wujik.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f4708227519501fc1d4e2b/1626632322710/answer_writing_practice_for_ias_mains_in_english.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec8f915f8bf969071ebeae/1626115985620/51951273240.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f74161cdffa04c097145a6/1626816866045/business_communication_books_free_download.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_off0000d381.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD381 16792 bytes
font_01_sfnt_off0000eb98.bin
b56ae068abb7915747a65a7bb25f95093ef093fe946abf878d8dfc52cfaec835		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB98 10808 bytes
font_02_sfnt_off0001044b.bin
7fc75b4609951853d8e87b353d2168c09be1f4c8151790427f2ed7d5ce95b409		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1044B 16576 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.