Malicious PDF — malware analysis report

Static analysis result for SHA-256 232eb63f018d051e…

MALICIOUS

PDF

85.0 KB Created: 2021-08-27 16:17:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: cdaeb7d421abeb7ae6fe961175dd99c8 SHA-1: 9717f976057465b8c6a3eac96faa4181fba24b4b SHA-256: 232eb63f018d051e4c87bde4f9096ed96fa1ca1101a914b1643327418f842476
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites acting as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The embedded JavaScript is a common technique for executing malicious code or redirecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://philabc.ru/uplcv?utm_term=all+non+flowering+plants PDF link annotation
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/mubmb7goiperq64mifqsq6ii16/tisufetakit.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/frbusg1l0jh8vjtmjrv2tu4npe/6665959106.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/nfrqskul79sn3ltota9jcli8qd/polunurokigogikusidorunon.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093bacab6968---netomimakaxojoworuwiwaxap.pdfIn PDF document text
    • http://hanasushimenifee.com/uploads/files/buwodipajux.pdfIn PDF document text
    • http://scouttautomotive.com/editor_uploads/system/files/fepewamobon.pdfIn PDF document text
    • http://cathyourhair.nl/js/ckfinder/userfiles/files/fugoxer.pdfIn PDF document text
    • http://byty-pardubice.eu/UserFiles/File/xefisoloxitow.pdfIn PDF document text
    • https://sportuna.be/ckfinder/userfiles/files/sexek.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/22630787665.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d2780e55f45---98126062601.pdfIn PDF document text
    • https://angelsforwarriors.org/userfiles/files/74706371577.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/16066865099.pdfIn PDF document text
    • http://motolargo.pl/userfiles/file/vuvod.pdfIn PDF document text
    • http://wonsakai.com/uploads/files/dabizew.pdfIn PDF document text
    • http://womenshealthcarenp.com/clients/2/29/29a32d4da59f0b4eaa4573e1354aeabc/File/41296232424.pdfIn PDF document text
    • http://hrt-foto.hu/_user/file/bufifibamikevopib.pdfIn PDF document text
    • http://safaraval.com/basefile/safaravalcom/files/90480123328.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/sejisibolexu.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6d31d2116b71df113104145dac40bb71/4544308487.pdfIn PDF document text
    • https://livresdarts.com/ckfinder/userfiles/files/pipudejoralezagopatavegut.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/ludemeripanefosenajopef.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e9f2b0eef23a321689911c2498767292/6305681454.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/jajunidanifukeg.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/310jt310lrs8onjitr7a9has23/17500660851.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_off0000e7a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A6 17740 bytes
SHA-256: 8c1528f43a034f8bcc29897803030de89343f581ae23426ca89cf6772623c13e
font_01_sfnt_off000115ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115ED 10600 bytes
SHA-256: 32bc6d2d3a564868cec6cbb7eaca4d040c5fee9c73c50333ce5095d1eb109ee4
font_02_sfnt_off00012e62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E62 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1