Malicious PDF — malware analysis report

Static analysis result for SHA-256 b92c29b8f259d481…

MALICIOUS

PDF

70.5 KB Created: 2021-03-29 19:01:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: bc95c776228b548f90eb96d11fa02a26 SHA-1: c3ef18ad8a50a8cac8adca1e2c6c7fe5b588a35e SHA-256: b92c29b8f259d481231b9761111c644abbbaaf3d095b4dc9499bf39fbac54b6d
186 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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://kuzutuzo.ru/strik?utm_term=livro+compreendendo+todas+as+par%25C3%25A1bolas+de+jesus+pdf PDF link annotation
    • https://dowosebiz.weebly.com/uploads/1/3/1/8/131871919/wibekojedu.pdfIn PDF document text
    • https://sugowixo.weebly.com/uploads/1/3/4/5/134588459/162c1.pdfIn PDF document text
    • http://deutschebank-meine.com/detubafaba6b5eu.pdfIn PDF document text
    • http://goodsfor.life/breville_smart_oven_pro_vs_air_reddit7ejcz.pdfIn PDF document text
    • https://pibigetikuke.weebly.com/uploads/1/3/5/3/135387636/8632324.pdfIn PDF document text
    • https://basupetuwesaf.weebly.com/uploads/1/3/0/7/130739706/a5b2eb36101f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mifazafodig.rf.gd/30009905782.pdfIn PDF document text
    • https://3a00e800-a8eb-44ae-aafc-ae9aecab8e06.filesusr.com/ugd/1715bf_a202e2a4d74940e2bd222aee2aa04cdb.pdf?index=trueIn PDF document text
    • http://sibesexewelemu.rf.gd/bawovorixamopugoj.pdfIn PDF document text
    • http://didabatok.epizy.com/davoguvudejuvuvofoni.pdfIn PDF document text
    • http://loxugosatutibiv.epizy.com/how_to_glaze_heb_spiral_sliced_ham.pdfIn PDF document text
    • https://3d7c42e8-cad9-4196-8f3c-0f210fd97588.filesusr.com/ugd/1b7c00_443d10f327af4876b1e64ccb4abc5d8e.pdf?index=trueIn PDF document text
    • http://werolalijatet.rf.gd/mole_concept_questions_class_9.pdfIn PDF document text
    • https://4779f2f8-a33e-4327-9c78-21ee0bcf4620.filesusr.com/ugd/31bf02_ee6346e918f345a386f28f01628f9eac.pdf?index=trueIn PDF document text
    • https://ecab545c-19d2-4654-b6ac-fb8b9749f5ba.filesusr.com/ugd/e5412a_8c480bfd3ca6465faca3a9ecd7411bbd.pdf?index=trueIn PDF document text
    • http://xijuroluzuka.epizy.com/81788940703.pdfIn PDF document text
    • http://petirepure.epizy.com/20446448085.pdfIn PDF document text
    • https://99470c7d-c692-4648-a7b8-36ea19db2883.filesusr.com/ugd/ab059d_c9e77d67293b456db56d1d4935572eb0.pdf?index=trueIn 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_off0000d17c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD17C 5752 bytes
SHA-256: 68cb74a8958cb4cadfe0aa02d876a424f5fb8ac2b7701d43a47ae2eb442e9985
font_01_sfnt_off0000e470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE470 12108 bytes
SHA-256: d1aba43a0c07c08e915cde8f718a8b854f3cfe7f13b715a85792f9b15142e6dc

Open this report in the interactive analyzer, or submit your own file for analysis.