Malicious PDF — malware analysis report

Static analysis result for SHA-256 751a479610f3bc44…

MALICIOUS

PDF

198.6 KB Created: 2021-04-22 21:05:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b568586ed26f2e5510f3ca2522f845b0 SHA-1: 42feb5eb90eca28f5d6dc18c3b842723ff5f959c SHA-256: 751a479610f3bc4400a8fda26e4e2b01c631cf6a25d517ef9868011b5e21eeae
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded URIs that point to external resources, likely for phishing or malware distribution. The presence of these external links suggests an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://golowaki.ru/strik?utm_term=silent+hunter+3+torpedo+range PDF link annotation
    • http://mepamoso.sportsontheweb.net/skf_bearing_numbering_system.pdfIn PDF document text
    • http://tuderoba.getenjoyment.net/wodokopafetexobazozakudij.pdfIn PDF document text
    • http://frontend-developer-azaynullin.site/orchestral_manoeuvres_in_the_dark_discographyq4cp9.pdfIn PDF document text
    • http://womans30planet.com/what_are_the_different_elements_of_technical_analysisg1nsc.pdfIn PDF document text
    • http://bulakirip.getenjoyment.net/rofef.pdfIn PDF document text
    • http://sixesijilolun.mywebcommunity.org/indifference_point_of_ebit_formula.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445739/normal_5ff861829ad2b.pdfIn PDF document text
    • http://pinezotamex.getenjoyment.net/categorical_data_analysis_agresti_3rd_edition.pdfIn PDF document text
    • https://cdn.sqhk.co/mixekuwuvo/ihjhhgo/vodijuzakilufi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488807/normal_6013a7d5b1bca.pdfIn PDF document text
    • http://junumidutuzakox.getenjoyment.net/how_to_troubleshoot_a_thermostat.pdfIn PDF document text
    • https://cdn.sqhk.co/titubebojek/d4jigpX/10959372800.pdfIn PDF document text
    • https://cdn.sqhk.co/lebogomatoze/n5sOAhj/bingo_trumpet_sheet_music.pdfIn PDF document text
    • http://jepenufi.getenjoyment.net/68237027757.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ca3ec1ac-6ff7-4c8f-ae0f-86a30d86e335.filesusr.com/ugd/3615fb_c53bc4921d7b4b479a81b5d5910525fe.pdf?index=trueIn PDF document text
    • https://86860ce8-2957-478e-97c3-2abddc2d2c3c.filesusr.com/ugd/754ed1_9199ee4e04ce47a9ae87199d9866d7c6.pdf?index=trueIn PDF document text
    • https://76c9fb28-c10e-4950-85be-37de24a2ede8.filesusr.com/ugd/fa32a6_30b5c470ec884423b8f2ebd58e13a91c.pdf?index=trueIn PDF document text
    • https://656adf98-7a81-40bd-8d0f-2b9c27d09201.filesusr.com/ugd/268ab1_11a88e4ff5b047d084c4339a0b5904e7.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002d419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D419 5312 bytes
SHA-256: 5ee4699107bf26480f7e4508a6cd1d938485056a5690f37dcb494e2202df10eb
font_01_sfnt_off0002e61e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E61E 10688 bytes
SHA-256: c50dbdfb8bd5f82598e37a3e1f248cb31f500e1d5cb557b2d57ad2e7c3580bad

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