Malicious PDF — malware analysis report

Static analysis result for SHA-256 a01ae3e3ccb20187…

MALICIOUS

PDF

89.0 KB Created: 2021-03-08 19:17:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f31259f3850fb71650f3819151c8376b SHA-1: df84fc31fc38aa6d1d6e767b7e69345955771b38 SHA-256: a01ae3e3ccb20187940f30a82fca16d81e747530518ae3c4923f8f1c8052b3d5
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to potentially malicious domains like 'cyberlife.store' and 'probnik1313.tech'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these links, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the presence of embedded URLs and the ML classification strongly suggest malicious intent, likely to redirect users to sites hosting malware or phishing content.

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://crophysi.ru/123?utm_term=ocarina+zelda+sheet+music PDF link annotation
    • http://cyberlife.store/descargar_el_himno_nacional_de_honduras_completoax8th.pdfIn PDF document text
    • http://probnik1313.tech/421567545ejbhu.pdfIn PDF document text
    • http://helplnstagramcontact6088758.com/kovotozevugak4ive.pdfIn PDF document text
    • http://monubagujizud.mywebcommunity.org/what_body_type_is_a_skinny_fat_person.pdfIn PDF document text
    • http://sewawena.scienceontheweb.net/15533785193.pdfIn PDF document text
    • http://roxedizusugu.mywebcommunity.org/boss_ve-20_vs_tc_helicon_voicelive.pdfIn PDF document text
    • http://esmoney.site/social_construction_and_essentialism_in_gender8eee9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5446c36-6545-4a1c-a540-a9f70f911b8a/psychology_ciccarelli__white_4th_edition.pdfIn PDF document text
    • https://1e1f235d-56dd-4976-b20d-d38e3fe7b172.filesusr.com/ugd/210b45_4738dedf3d6d473bb3701b27bd1ba7f0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9788498d-0de6-49e8-8ad5-1df845ba780a/lalufosonorupawobudilog.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/do_toyota_camrys_have_transmission_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/71063465963.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/goxeze.pdfIn PDF document text
    • http://bivojeda.atwebpages.com/how_to_break_into_a_cannon_safe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/672369c7-7f1c-40e2-ad60-03180dc06cf6/xupirurusizajo.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/1788746262.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/walt_whitman_poem_america_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5dffefe-fb69-4dbf-976f-748ced85334e/free_electric_pressure_cooker_recipes.pdfIn PDF document text
    • http://zijiwaras.onlinewebshop.net/logical_fallacies_quiz_with_answers.pdfIn PDF document text
    • https://65d0a56f-4074-4e8f-9acc-29e6f8e8f663.filesusr.com/ugd/37655d_9966f030471b45ef9f3f4643ac58908f.pdf?index=trueIn PDF document text
    • https://8eeb1f0a-0cdd-4c66-98a4-83777b49fb54.filesusr.com/ugd/64f9d2_a8df18b580504dc29689a3f217419856.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BE 5256 bytes
SHA-256: d2af553e892ee4cbe783b5359a6b4dbf7828a09480ad54a22d5c284e86aefaac
font_01_sfnt_off00011b74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B74 11232 bytes
SHA-256: a116575c43def842ce7f20d2c759252f2bcacd37bd9b63efd0cea642add32423
font_02_sfnt_off000141c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141C6 16100 bytes
SHA-256: d973db94ba2c448c661c26f08d051ac794e7cb4f3c7daa33c2141e8036f071b6