Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e72cbaecd00f9fe…

MALICIOUS

PDF

80.0 KB Created: 2021-09-09 17:07:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 61f926e38f1a294ef9b065ad25a4a403 SHA-1: 2002c9970bcefc017ab215d8f80b6a0569711c31 SHA-256: 0e72cbaecd00f9fe20e52c76cad1f9ad253d7068d93ee5c28880d9efa42af66d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains embedded JavaScript and numerous external URIs, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be redirecting users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 7

  • 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 link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://allytemp.ru/uplcv?utm_term=smartphone+open+source+os PDF link annotation
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613142ed11de2---bofazaxuvabenuxulodiweju.pdfIn PDF document text
    • http://jvcc.cn/ckfinder/userfiles/files/21090118070983045949gnm.pdfIn PDF document text
    • http://dspec-car.com/js/upload/files/58012410426.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16135f1c2a875a---pemosebabameluwosuxed.pdfIn PDF document text
    • http://energyexcess.com/userfiles/file/98959490942.pdfIn PDF document text
    • https://terracetemayonetim.com/upload/ckfinder/files/19351026949.pdfIn PDF document text
    • http://damutech.kz/upload/2021/09files/210905033210760068369md.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/48476d85612072a07e77b5ab83231de0/nozumupubetowegiri.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16130145ba046d---gireniziwoxufepuded.pdfIn PDF document text
    • https://helicopterleasingservices.com/userfiles/files/9770009780.pdfIn PDF document text
    • http://www.ufolep-69.com/contenus/files/terilodavezivo.pdfIn PDF document text
    • http://location-appartement-venise.com/italie_documents/files/52258319667.pdfIn PDF document text
    • http://sanalights.com/admin/admin/uploadfiles/file/bonabulekojimosej.pdfIn PDF document text
    • http://millecolori.it/images/file/34313000855.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-9-4/20210904184856215108.pdfIn PDF document text
    • http://infinity-pro.ru/userfiles/file/91234029286.pdfIn PDF document text
    • http://srmtteaparty.com/uploads/files/202109071030029775.pdfIn PDF document text
    • https://cakenflowersonline.com/userfiles/file/gutolagidofalem.pdfIn PDF document text
    • http://short-story.ru/upload/file/9063553741.pdfIn PDF document text
    • http://autoscuolauniversale.it/userfiles/files/morojobexovoteviw.pdfIn PDF document text
    • https://snapstudios.ca/userfiles/file/kegofirefa.pdfIn PDF document text
    • https://viscom.bg/uploads/wysiwyg/files/78677566990.pdfIn PDF document text
    • http://helloshoppingnepal.com/userfiles/file/48952498772.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/161395c9c30634---15321072632.pdfIn PDF document text
    • http://residencelesaline.it/userfiles/files/48775332156.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/75de85865f88718377e92d50eec987d6/xafaxame.pdfIn PDF document text
    • http://bunny888.com/ckfinder/userfiles/files/xelaromowojotimezegizop.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d48f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD48F 17444 bytes
SHA-256: 5aaccc25b47cbb511a2189a8a002d44d38ec96353b9c1aa48db61e863713b2e7
font_01_sfnt_off00010179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10179 10676 bytes
SHA-256: e9f74fa5108b156aec4fa53fd63faa899b88b1011907a2667c8618c5207a52ac
font_02_sfnt_off000119c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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