Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bcc0c416fdde623…

MALICIOUS

PDF

83.7 KB Created: 2021-07-22 00:37:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 59d06c3f312dd13fb1c8734a08e12374 SHA-1: 1ba3489e33e8903551ae8d76454414d8e193602f SHA-256: 3bcc0c416fdde623e4fab2675d4669ebe31324d3647551f6be58d53f2918cf91
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier with high confidence. It contains an embedded URI pointing to 'https://crysiq.ru/square?utm_term=dynamic+chest+warm+up', which is likely a phishing or malware distribution site. No scripts were extracted, but the PDF structure and embedded URI suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://crysiq.ru/square?utm_term=dynamic+chest+warm+up
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f68ddec1723860426ca011/1626770911023/tiparixiponanufisipewaza.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f0d40c46c0d74f87da7573/1626395660786/best_defense_layout_for_town_hall_5.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f51ec223bf9c1bcafbfe1a/1626676931036/4523679675.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60edd59db0089c62dc3d4a5c/1626199453700/difference_between_linear_feet_and_square_feet.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edf3642799685454fb725b/1626207076744/pooping_like_a_rabbit.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f216fcb3909637de992a4b/1626478332361/fibiva.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8f8e718245d33f1801106/1625880807282/automata_and_complexity.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f38ac11ad9bf1c32b6e964/1626573505585/14656013732.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f3e57281f38b20588c952e/1626596723030/vapasunozikunoxevupawu.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f05c910b1da83e50954d5b/1626365073176/93578757731.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f8936f22379e74eb7ace76/1626903408188/adding_and_subtracting_signed_numbers.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f52125d9389f5e80a35bf4/1626677541455/berezadi.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f68a2577a6136bf6fadfbc/1626769957198/kibefubagagijawosulugab.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec76fe8bb04542cee32cac/1626109694183/81777082532.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec93b183836e7a7d62235e/1626117041347/can_you_eat_corned_beef_without_cooking.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f1a18ba3cddc5e864b535a/1626448267674/anthonys_brick_oven_pizza_near_me.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f7620682acca63b3f97c92/1626825222939/dizazaga.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f53e99bf9212646c51669d/1626685081596/an_acute_angle_measures_between.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e800d8efb14d112212daf8/1625817304395/loroxojanivoluwubimegid.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e94e01cc7c08645928281d/1625902593846/body_by_design_fitness.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_off0000e62d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE62D 16792 bytes
font_01_sfnt_off0000fe3f.bin
4d344b25875dc0d12575bbcc718e12b0c7f70aa5a8fe8d210595cf881a75c362		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3F 15964 bytes
font_02_sfnt_off0001277b.bin
2e43f88f24e21d533b7c866e3f284a912a910361259e3855e63541f342891e33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1277B 10772 bytes

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