Malicious PDF — malware analysis report

Static analysis result for SHA-256 6447c2d3bdc94977…

MALICIOUS

PDF

93.3 KB Created: 2021-09-03 21:04:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2596fb187be96309f554673993543518 SHA-1: 927b06996f48b47f9a020315bfb944f4c26ae2c3 SHA-256: 6447c2d3bdc94977fe017b8aab189c01a4a9ecd6cd037a98daec70d036e57d00
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and IP literal addresses indicates an attempt to lead the user to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 https://ketchas.ru/uplcv?utm_term=honours+4th+year+result+2019+pdf PDF link annotation
    • https://tumujerrusa.com/userfiles/70234050986.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160dfc170ad797---24243808304.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/16076337f8863b---rojaxetanijux.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/161304a1ca6001---levolojan.pdfIn PDF document text
    • http://chemicalengineers.ie/images/pebijuxu.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/f84db04af1599afe145a10af178108f1/wubegimaz.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16086e62ba3722---gowovivi.pdfIn PDF document text
    • http://dtmaso.com/public_html/Imagens/file/voponimirovorovedixemuwe.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/vsdpi7p7ure5nmruduhvlio21k/dinemiduj.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/lgjhda863pmriain4rvfshtd9a/52930383566.pdfIn PDF document text
    • https://gbagencement.fr/uploads/file/28590929233.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/161308eab2f537---82762139862.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16081478fe9a7d---disiwetaluk.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b81bfc816c8---sesaragukogefa.pdfPDF link annotation
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/16092a3ee9c74f---13136835037.pdfIn PDF document text
    • http://playeasypiano.com/resources/fck_images/nojedi.pdfIn PDF document text
    • http://fipjp.com/userfiles/file/85471753027.pdfIn PDF document text
    • http://agro-vostok.ru/userfiles/file/15668413573.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/3qvasq3b8id8sbb8tojgkpfof6/81649595495.pdfIn PDF document text
    • http://abbwingslynnhaven.com/uploads/files/41209490462.pdfIn PDF document text
    • http://itineraire-consulting.com/ckfinder/userfiles/files/vakexalinokepojon.pdfIn PDF document text
    • http://tvtamminhphat.com/uploads/userfiles/file/94687044545.pdfIn PDF document text
    • http://phyllisrubensteinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mazafigilidap.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f625162bb30---36480124744.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608455b0714e4---85085868204.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_off000101fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101FA 19392 bytes
SHA-256: 4d6bb96430f23bf2a5774973cccb6031cb7d1290404ba1065e0c63d6237aadf0
font_01_sfnt_off000134b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134B8 11248 bytes
SHA-256: 6608fd46309c16db51c4977ffc1816d64491077091e1545dec8f0315176db093
font_02_sfnt_off00014f32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1