Malicious PDF — malware analysis report

Static analysis result for SHA-256 1826e5941f58bcb7…

MALICIOUS

PDF

74.3 KB Created: 2021-03-10 14:58:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a11e7b06a23fad7a15e49c53a6583023 SHA-1: eefa36124bf8d3bdcb149d2bd6cf24c4df0e38d6 SHA-256: 1826e5941f58bcb7cd1c95d54d334be24858c934aeb97247e491ce01e9d15f7f
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'mezovuduw.ru', which is likely a phishing or malware distribution site. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/wix?keyword=las+tic+en+el+ambito+laboral+ventajas+y+desventajas PDF link annotation
    • http://shtangelkipokupkiitd.online/tagixopirie076e.pdfIn PDF document text
    • http://bestita.space/transmission_line_theory_basicsc8n91.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/jezup.pdfIn PDF document text
    • http://helps-lnstagramcopyrights-about.com/fugener6cou.pdfIn PDF document text
    • http://numulul.mygamesonline.org/how_to_study_for_ap_human_geography_test.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/zunewidimem/wigogepeberitipapikonidoj.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/alinta_energy_solar_pv_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/33446491575.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/cot_bed_flannelette_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e897392-50e5-4fad-a6fa-342ca50556ea/2470204586.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ab4a982-9291-49cb-b3d4-7ae170ac1886/dozetu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a5a9745-81a8-4bd8-ab19-d1576bf1b0c9/word_crossy_answers_2864.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c19d3421-27b0-415e-95f7-479daf337b4f/coleman_425e_camp_stove_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wowonesoribu/vuclip_old_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/vaimanika_shastra_in_sanskrit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/481eb6ce-01c9-4daa-9bdc-e6164cd8ca8b/kilusowusedifimagaxevute.pdfIn PDF document text
    • http://kozogasivufi.myartsonline.com/55972784410.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/fps_games_with_controller_support_android.pdfIn PDF document text
    • http://zagofij.onlinewebshop.net/60711276767.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/panchatantra_stories_in_telugu_free.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_off0000e241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE241 5404 bytes
SHA-256: a07b9e3b1416dba49ebd7105c3b4da92c65dd0b62b8ed0bbbf8767071ceeb4f5
font_01_sfnt_off0000f499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF499 11364 bytes
SHA-256: 79fe0187d4a93ea910d9ff1ead4f0d20998b62bcba564ed7b3ad5815fbe2dfa6

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