Malicious PDF — malware analysis report

Static analysis result for SHA-256 334722c6ff3110e7…

MALICIOUS

PDF

91.4 KB Created: 2021-03-20 13:15:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 626522263ff7303afa4eb9d548424ead SHA-1: 012aaccf5788bd12d33c134a9574868cdbd96491 SHA-256: 334722c6ff3110e788f1823e2f72f5b73b3c6dd55d4d151d2c8d1061bc3137c6
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent link pointing to 'resalured.ru'. This heuristic, combined with ClamAV detection and ML classification, strongly suggests a phishing or malware distribution attempt. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate an effort to direct users to external resources, likely malicious. No scripts were extracted, but the overall structure and heuristics point to a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wix?keyword=rival+steamer+instruction+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366952/normal_604a99dc26ade.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494139/normal_5ff083246d25d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450876/normal_603d8c6549d7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420431/normal_603a9ac9deb89.pdfIn PDF document text
    • https://damatabawapu.weebly.com/uploads/1/3/1/3/131379320/disekasufi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421341/normal_6043389c089bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368495/normal_5fdf00647b007.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481988/normal_5fe2616654538.pdfIn PDF document text
    • https://fufajogaxofamu.weebly.com/uploads/1/3/4/6/134627879/tanexedusutidug-sodexufiwupilud.pdfIn PDF document text
    • http://tinutig.22web.org/ionic_bonding_worksheet_1.pdfIn PDF document text
    • http://komujevakikumu.22web.org/laselapovore.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/read_theory_answer_key_grade_3.pdfIn PDF document text
    • http://velefejaforafe.rf.gd/what_is_a_healthy_relationship_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76b9fac8-ba44-47e8-8239-0af48af3ebe5/liramiruxagigita.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/java_fresher_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/wusesajafafodoxojewogox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74d99c63-844b-4d4e-b0ed-e3e49db2ed09/86083663872.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65897488-9017-4945-a844-cfa812f06218/dark_souls_prepare_to_die_edition_save_editor_pc_ps4_controller.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/rocket_chat_android_video_call.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/manualidades_para_vender_paso_a_paso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e45c8356-0db6-463a-b7a1-c1ddd776f96c/beautiful_creatures_rio_2.pdfIn PDF document text
    • http://radujexoxetapil.epizy.com/definition_of_pragmatics_in_linguistics.pdfIn 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_off000124cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124CD 5012 bytes
SHA-256: d1ef9b5dcb0fdd4306804bd4ecb176c39cdcb769df9dfa38deb0d90ec7866c4f
font_01_sfnt_off000135ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135CA 12204 bytes
SHA-256: 637f9f212c5f872c9902b05cd6fef5281e616a58f80cdb13eb5985c4f7b1ced2

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