Malicious PDF — malware analysis report

Static analysis result for SHA-256 29784dc4bb785e09…

MALICIOUS

PDF

79.9 KB Created: 2021-09-08 02:19:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 553ffe881ca8d9461671027bc0fd3732 SHA-1: f0e45db17ba79313deeb134e5f43ffcdffb5fc47 SHA-256: 29784dc4bb785e0986122230cc40bfe2d180eca7fe4da02c6c0fcf322368484b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm directing to multiple domains, many of which are hosted on compromised WordPress sites or disposable domains, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely serving as an initial lure for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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 http://shssailors1969.com/clients/3/36/366f78b21138e0f8005dfe6cc5e09e30/File/69399794287.pdf In PDF document text
    • https://lolakarimova.uz/ckfinder/userfiles/files/40677623609.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/f9f686a31c22fe945d70b5c8fca6a25c/dagosebagijebopoxutibok.pdfIn PDF document text
    • http://xn----7sbezcba9a5aggb3j.xn--p1ai/ckfinder/userfiles/files/65577926745.pdfIn PDF document text
    • http://dakmoto.cz/obrazky/file/malakisu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608729ea2e368---83351710589.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090ff1d1a663---bezedudeb.pdfIn PDF document text
    • https://hansenlight.com/UploadFile/files/minegavivofazaviki.pdfIn PDF document text
    • https://recapress.com/ckfinder/userfiles/files/bubukowipategeluk.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/23effb36e932c94ecccc76481878718f/puxakimikobet.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075381671fd7---kawuseworexejaminakizijit.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/nodugiwogu.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/bb6e954a52cc0f1a8342c5bfc2d2cdbc/89802545028.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1608117f607158---91123389477.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/2021618155505782.pdfIn PDF document text
    • http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/24305488393.pdfIn PDF document text
    • http://agro-pasz.pl/ckfinder/userfiles/files/17571391030.pdfIn PDF document text
    • http://natpuedu.in/userfiles/file/87689770473.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d75734603---1332629468.pdfIn PDF document text
    • http://artospace.com/pics/file/lulujumoniwuvofeperemenam.pdfIn PDF document text
    • http://prestinoequitacion.com/imagenes/upload/files/24504666674.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/asp04hrrifg7smop22efrncksf/kagiropusisowodelorobeves.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=checkers+game+rules+pdfPDF link annotation
    • 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_off0000d655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD655 10876 bytes
SHA-256: 939625e79f47c0aedccaeb1bec867d9a02dd88670f00e6ecde159c19ab2f95ea
font_01_sfnt_off0000ef51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF51 16676 bytes
SHA-256: 651a7c7b8c4b9b27db9756d999510e38a78e63a58157cb857335f265e054b125
font_02_sfnt_off00011a69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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