Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba26c3169c6608f2…

MALICIOUS

PDF

86.2 KB Created: 2021-02-16 09:39:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 08db8c9a9602f261ac4758c3e42deab6 SHA-1: 58200f7d77427b8ba8619e2805df7a1cfaa59379 SHA-256: ba26c3169c6608f2923179d798a1dea5208454f0bef733ab742dc2bc0aa77ddc
156 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 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/wix?keyword=edheads+stem+cell+heart+repair+answers PDF link annotation
    • https://jonolepazom.weebly.com/uploads/1/3/4/5/134520471/6688773.pdfIn PDF document text
    • https://misetibu.weebly.com/uploads/1/3/1/4/131438078/6365491.pdfIn PDF document text
    • https://vabomunebalobi.weebly.com/uploads/1/3/1/8/131856010/81ed7a9ecf14.pdfIn PDF document text
    • https://kitozegukelod.weebly.com/uploads/1/3/6/0/136056839/tonabajosuju.pdfIn PDF document text
    • https://tigibivimibi.weebly.com/uploads/1/3/4/3/134344299/4e78d9ceb01.pdfIn PDF document text
    • https://tekemuwuva.weebly.com/uploads/1/3/0/7/130775778/7b4c5931c3.pdfIn PDF document text
    • http://tojumuwuluso.iblogger.org/90889664386.pdfIn PDF document text
    • https://virutabadipepuv.weebly.com/uploads/1/3/1/3/131398083/794aaf9e2d.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/jivala/tatode.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/salimukeju.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/xudekedujasofad.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/76328836508.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/cao_beveiliging_2018_en.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/35788997437.pdfIn PDF document text
    • http://xaposekesudonod.epizy.com/bcbs_federal_medication_prior_authorization_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/fanilalewajodigupim.pdfIn PDF document text
    • http://fabodatutowew.epizy.com/xosukowivozekudutix.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/tolatiso.pdfIn PDF document text
    • http://vakabivemu.epizy.com/water_bottle_minecraft_crafting_guide.pdfIn PDF document text
    • http://rozesefotuduwef.epizy.com/11371311781.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000113f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F8 5364 bytes
SHA-256: e261a888ca88d855a5bb58e750a129c98a2857023ae55c06a5d06c515129b6cf
font_01_sfnt_off00012617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12617 10872 bytes
SHA-256: 7befe77946c5d99e30f5d4e50d796245efaeced22cdcf3d90ea1f2bce4f39e80

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