Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3f627e5785e4d0b…

MALICIOUS

PDF

77.7 KB Created: 2021-03-13 12:53:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e858355943d7fa940679a6dbfb5bea47 SHA-1: 5a8d86e115e2d094a5ac6ba963ebf168efb8ab6a SHA-256: d3f627e5785e4d0bbdc80516f3b4918f4137533dbdfa139f0655c85a349d7524
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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.
  • 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/123?utm_term=cytogenetics+study+guide In PDF document text
    • http://kamesomoda.iblogger.org/xajixobakopajagamexe.pdfIn PDF document text
    • http://wubowobipevoto.mywebcommunity.org/angelcare_bath_support_grey_baby_bunting.pdfIn PDF document text
    • https://cdn.sqhk.co/gusejemife/hgjhijd/tazikaka.pdfIn PDF document text
    • http://katagonubazi.22web.org/sawar.pdfIn PDF document text
    • https://cdn.sqhk.co/janawezexoj/cNtsHq0/37869491999.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/icV7fjg/summer_bucket_list_ideas_for_college_students.pdfIn PDF document text
    • http://zekojotewakugag.mypressonline.com/kosala_book.pdfIn PDF document text
    • http://nutusugeralinet.mypressonline.com/34184187833.pdfIn PDF document text
    • http://wipesexijekem.22web.org/book_reader_android.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/legobegutulo/yahoo_mail_messenger_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/nedusaz.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/policy_approval_process_template.pdfIn PDF document text
    • http://vibirokudod.myartsonline.com/jifamagifusu.pdfIn PDF document text
    • http://kagiweluxipo.epizy.com/likoloxonutubel.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/mexizelinapak.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/besixovagidoninujipoka.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/73082256458.pdfIn PDF document text
    • http://tuxijug.rf.gd/request_copy_of_police_report_lapd.pdfIn PDF document text
    • http://dogurof.epizy.com/xudopanibebosesu.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/zelosaw.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/erode_district_court_recruitment_application_form.pdfIn PDF document text
    • http://gozudivigel.epizy.com/jixazebekifejesil.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/descargar_biblia_de_estudio_mundo_hispano.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_off0000f38a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38A 4776 bytes
SHA-256: 911a5c8c91c4930771dc469d0349ab0249d55e162fff9e0008f06d5bd0873c4f
font_01_sfnt_off000103ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103EC 10920 bytes
SHA-256: 03a93014d5b88611fa1029f8f57a9397f9ed26640468a95d6edb1de2dd6ba0b9

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