Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb154940f92b991c…

MALICIOUS

PDF

79.4 KB Created: 2021-02-02 01:44:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 257cc9d67028726c7a8a4456bc4f7d46 SHA-1: f3f6e266bf599ec60448be15ff0db00999b66a0b SHA-256: fb154940f92b991ca4bf2f814984140389faa0e04b2569ec00827b69103c02fc
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, with several pointing to known malicious redirectors. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or a link farm for SEO manipulation. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/aws?utm_term=ganglion+cyst+ultrasound+report In PDF document text
    • https://zikegebuner.weebly.com/uploads/1/3/4/8/134856814/kidinaroledevutas.pdfIn PDF document text
    • http://xitaboketeloba.iblogger.org/giant_squid_facts_and_information.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420222/normal_600fda8998ed3.pdfIn PDF document text
    • https://mokizafot.weebly.com/uploads/1/3/5/3/135347773/waxijavuwaxonumidi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448124/normal_5feb85ef69497.pdfIn PDF document text
    • http://xisulekotitis.iblogger.org/adobe_after_effects_template_files_free.pdfIn PDF document text
    • https://jubagidegugidok.weebly.com/uploads/1/3/5/3/135317658/704201.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389106/normal_601591d56c84c.pdfIn PDF document text
    • http://dikebar.22web.org/business_card_design_template_indesign.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468261/normal_60001f6af1f4b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://riporem.epizy.com/zezaxi.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/mikejizi.pdfIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/itinerary_ticket_template.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/back_again_song.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/meaningful_report_card_comments.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/antecedentes_historicos_de_la_fisioterapia.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/xopot.pdfIn PDF document text
    • http://fuzadakeju.epizy.com/firefox_android_import_bookmarks_from_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/heinemann_chemistry_1_workbook_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC00 5256 bytes
SHA-256: 815b4b4d2071e84788a05427637ac5b642597aeb89bed9b02564eee24f656d8f
font_01_sfnt_off0000fdfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFB 10652 bytes
SHA-256: 92e69723dbe439bd90a6c32ecbc29e3e00f22d33e40c5cfcf41ac15f497605a9
font_02_sfnt_off00012224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12224 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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