Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7749c34657fb1e9…

MALICIOUS

PDF

83.8 KB Created: 2021-07-16 19:56:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d26f856f78a9975abe3d5a8711252186 SHA-1: c83221ef1894970d9168f92bdc2f8dd453693b36 SHA-256: d7749c34657fb1e9e26e915b1308f5165815440d817c85682a2dfa707c3e3b02
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests a potential phishing or credential harvesting attempt. The PDF structure and embedded artifacts do not reveal specific scripting languages, but the general nature of malicious PDFs often involves JavaScript for exploitation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7052

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/kVSxLQpkboc/square?utm_term=propyl+gallate+safe+to+eat
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8df1b18245d33f17e3326/1625874203422/55611033043.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec8624dcef4a49b3ab1f97/1626113572165/both_teams_to_score_and_over_2.5.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec94e39cb57f380a790c69/1626117347693/movie_quizzes_and_answers.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee0d7e7c5bce1f33491728/1626213758419/vlookup_formula_in_excel_to_compare_two_columns_in_different_sheets.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f05cdb9d64d77af318c217/1626365147916/hollow_knight_how_to_get_all_charms.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7cc0969e16759cf750763/1625803785967/nifitekolebamenabijugu.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee5bdce7148d06bc72e3d5/1626233820496/dissolution_of_partnership_firm_by_court.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d20e.bin
679ffa8e94b32add89fe10b5b3d1baced4867152fd33f621094d44055c7309d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD20E 10452 bytes
font_01_sfnt_off0000ea00.bin
0c133022d1e9883d2ff7035cf84f1fa0be9cfa0d671266bc5a940283bc0f9855		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA00 16376 bytes
font_02_sfnt_off00010028.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10028 16792 bytes
font_03_sfnt_off0001183a.bin
6bdf07329606f5624a04136cbbab289be57065f9bb5e1cf814ceae3353ef9eb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1183A 16416 bytes

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