Malicious PDF — malware analysis report

Static analysis result for SHA-256 0763ece115e6d8d5…

MALICIOUS

PDF

77.9 KB Created: 2021-04-14 23:41:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: c41b8bcb6ec5314f1b83f6c1924e457d SHA-1: 48fe2441e0963f2718b03c185bb7074b2fa083f5 SHA-256: 0763ece115e6d8d5dd2fdb3b90baf751a55b5d2772b0bf3f6d7cf2a1e8755c12
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. The PDF contains a large number of embedded links pointing to various domains, suggesting a link farm or phishing campaign. The presence of 'utm_term' parameters in some URLs indicates tracking, often used in phishing lures. While no scripts were explicitly extracted, the PDF structure and numerous external links strongly suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xajibur.ru/strik?utm_term=yamaha+ypg-535+review PDF link annotation
    • http://fruitslope.online/que_es_oso_pandah4035.pdfIn PDF document text
    • http://carbackseat.site/26125282019mkwgg.pdfIn PDF document text
    • http://takimopunize.22web.org/xagefoxafari.pdfIn PDF document text
    • http://pizeval.iblogger.org/yamaha_cinema_rxv_v373.pdfIn PDF document text
    • http://pufonorigaji.22web.org/lelininuxobawazatunoxu.pdfIn PDF document text
    • http://lumurezekosarew.66ghz.com/zuzixoban.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449622/normal_603e0b9734eae.pdfIn PDF document text
    • http://milansit.space/tatezazogivabafozl16nh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416496/normal_60677f9e15f13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388612/normal_6023d74e52732.pdfIn PDF document text
    • http://xewitanajudozu.iblogger.org/ac_dc_power_supply_design.pdfIn PDF document text
    • http://alexsaf.ru/92721611122z55of.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450723/normal_6019b3e3b411f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lopetemiwi.rf.gd/gituronabiwofi.pdfIn PDF document text
    • http://miwunomo.epizy.com/que_es_genero_literario_poesia.pdfIn PDF document text
    • http://sinoragafinef.epizy.com/suvudodopixupiguzipu.pdfIn PDF document text
    • http://davosazofopamis.rf.gd/bill_of_lading_format.pdfIn PDF document text
    • http://kepozajadog.rf.gd/what_do_you_mean_by_self_reliance.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/jawure.pdfIn PDF document text
    • http://zowiseli.epizy.com/53866999622.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/business_card_illustrator_template.pdfIn PDF document text
    • http://jivirazi.epizy.com/jijunemumafizimatozot.pdfIn PDF document text
    • http://bupubuvapefumi.epizy.com/baofeng_uv-5r_software_driver.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_off0000eefa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFA 5560 bytes
SHA-256: 07b0c245140e1425f43582206ebf473f2583c21cfdc3f51706a90090feaf5056
font_01_sfnt_off000101ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101EE 11528 bytes
SHA-256: e2a17015d50576534bbbbe6a29416fc5c55e714fc60b63981aeb9070ce938f5b

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