Malicious PDF — malware analysis report

Static analysis result for SHA-256 2713a91c0d6be272…

MALICIOUS

PDF

83.7 KB Created: 2021-03-10 10:30:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c923df14467739ee0d3156824e54cd42 SHA-1: 227d885bebc31708869fa04b20235708813a50b3 SHA-256: 2713a91c0d6be272908b39fa5c5bbfd489a09b8689259d05074d7ae9e5705a4b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, 'resalured.ru', which is likely part of a phishing or malware delivery scheme. Although the document body is heavily obfuscated, the presence of the external URI and the overall detection strongly suggest a malicious intent to redirect the user to a harmful resource.

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://resalured.ru/award?keyword=roots+and+coefficients+of+quadratic+equations+pdf
    • https://cdn.sqhk.co/lijipatalenu/jiiidb1/alto_s_adventure_wingsuit_proximity.pdf
    • https://cdn-cms.f-static.net/uploads/4470843/normal_603eef13c5f48.pdf
    • https://cdn-cms.f-static.net/uploads/4368978/normal_603f5e7386694.pdf
    • https://static.s123-cdn-static.com/uploads/4478398/normal_5fcb6f3833e61.pdf
    • https://cdn.sqhk.co/goworonol/idjbgfh/dingo_ate_my_baby_meme.pdf
    • http://samettemiz.xyz/arduino_uno_driveri3kjn.pdf
    • http://slimerecipe.org/swann_surveillance_system_reviewssykl1.pdf
    • https://static.s123-cdn-static.com/uploads/4460975/normal_5fca062d6111c.pdf
    • https://cdn.sqhk.co/gajalalike/dhbNZja/jutupasobevij.pdf
    • https://cdn.sqhk.co/venitalobeni/RiadjaS/asos_neon_snake_print_bikini.pdf
    • http://pelubexeto.getenjoyment.net/how_to_program_spectrum_remote_to_toshiba_tv.pdf
    • http://1xbet-registr.site/how_to_define_iso_27001_scopei17cd.pdf
    • http://morasuxod.getenjoyment.net/84117108167.pdf
    • http://fuxanujibiz.mygamesonline.org/19239578924.pdf
    • https://static.s123-cdn-static.com/uploads/4418788/normal_60025e92c4f7a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fufinekudag.epizy.com/hilldene_primary_school_ofsted_report.pdf
    • https://uploads.strikinglycdn.com/files/c37a8622-4cc7-4937-8a7e-658ecfb30fa9/disavuj.pdf
    • https://uploads.strikinglycdn.com/files/8f1d91e1-b332-4ef5-b109-573e7149a7c4/what_are_algorithmic_trading_strategies.pdf
    • https://uploads.strikinglycdn.com/files/0faa3ed2-1087-4afa-8023-398fba74a8e8/67515341575.pdf
    • http://tizexazebubo.atwebpages.com/the_way_of_the_world_movie_download.pdf
    • http://renulekefa.epizy.com/nalefije.pdf
    • https://uploads.strikinglycdn.com/files/648ab501-4d12-4974-b09d-b2eda53fc420/texto_argumentativo_caracteristicas_y_estructura.pdf
    • http://xepuzakudera.atwebpages.com/tom_clancy_book_rainbow_six.pdf
    • https://uploads.strikinglycdn.com/files/f35b3429-f301-4c31-aeeb-ddeb65f14f48/international_4300_dt466_dump_truck_for_sale.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://scripts.sil.org/OFL
    • 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_off0000eac2.bin
78a15f5ab36d460c0a3c8b2afb25939dbf4250368e5991f40fc69f0a9b8a762b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC2 5252 bytes
font_01_sfnt_off0000fcb6.bin
c56b5fa4833edb5d4085f2ca01c7ab02086ad58652460583925f8740d0345276		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB6 14724 bytes
font_02_sfnt_off00012ba4.bin
3a87a2a80cb0740ff7ad33dbd9b35031d90241dfccc5ab96a3d2c3133af9c3ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA4 16096 bytes

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