Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d666426af72ce4f…

MALICIOUS

PDF

80.9 KB Created: 2021-05-02 13:50:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 0e28acb6dd3c4f551edc751e51ccbaa7 SHA-1: df7a75f0889f554caa176404ef57a295bbc73af1 SHA-256: 2d666426af72ce4f1cd911d8747543d35f6fb241b8bde24cf9e778f0198fc13c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure itself is indicative of a link farm or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://leonvi.ru/strik?utm_term=jane+austen+like+movies+on+netflix PDF link annotation
    • https://nunavupogo.weebly.com/uploads/1/3/4/4/134471291/pexadune.pdfIn PDF document text
    • https://powotatetodo.weebly.com/uploads/1/3/0/7/130738650/zegupivegenolo.pdfIn PDF document text
    • https://feverawujebuv.weebly.com/uploads/1/3/5/3/135314909/fumesobum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418985/normal_5fe2509a7954d.pdfIn PDF document text
    • http://mx50off.pro/canned_heat_on_the_road_again_harmonica_tabu7cyu.pdfIn PDF document text
    • https://nupetumagapet.weebly.com/uploads/1/3/1/8/131859993/kobegowegavoraj.pdfIn PDF document text
    • http://nikecortez.net/alphabetical_order_worksheets_for_grade_6pmea0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416932/normal_5ff7d353bc368.pdfIn PDF document text
    • http://tizezs.xyz/ohms_law_practice_worksheet_answer_keypfpst.pdfIn PDF document text
    • http://strahuemsya.info/grupo_whatsapp_pais_separadosazmes.pdfIn PDF document text
    • https://bekajujoxofutit.weebly.com/uploads/1/3/1/4/131406668/004ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480581/normal_60675a115f29a.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/domegagowevag/kali_linux_nethunter_edition_wifi_hack_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/allentown_pa_police_accident_reports.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fbd5a25-bbdf-4b39-bc53-1b1af1242b07/vozowuwuwaxodas.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/1534178008.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/image_upload_html_template.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/fegexagemododusuzefimixet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c707cd27-f1fb-4a10-889b-6297a078b629/old_rock_music_radio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f16bda2-0281-4b19-bc9f-955176c65a45/15080535105.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/430aa81b-478e-4f41-893d-2826eb4f540c/katogetomirezivurawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a787a24-da4f-46fa-8939-0e79a4de27b7/juegos_de_hombre_lobo_para_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71533b6f-3409-455e-92c7-bcd0d2d93136/puwovadoditibi.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_off0000ff00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF00 5000 bytes
SHA-256: 238ec2aa0ea60ee51abdfc27068411ca55f87c01469e292d7d3cab35cabc5085
font_01_sfnt_off00011008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11008 11484 bytes
SHA-256: 8d994139967f3574ba1015da9bf191189e5498bb2c444f49f52f10125f14f0ba

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