Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a923f93f4ad0075…

MALICIOUS

PDF

88.7 KB Created: 2021-08-01 20:00:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ccefa0eef840cc5c37131023f24bf850 SHA-1: cfed782877352a755f79688dc67586f20b3f8c9f SHA-256: 2a923f93f4ad0075889afafe0b8c52d94f89a8ef3d49255a0bd8457e05c7a2a6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to distribute malware. The heuristic 'SE_INVOICE_LURE' indicates the document's content is likely a fake invoice or payment request to trick the user into clicking these links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://pixomot.ru/uplcv?utm_term=prism+video+converter+activation+code PDF link annotation
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/c86pvk7jlv0napr1h4105mfha3/54897726504.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16071b75769a96---39541145799.pdfIn PDF document text
    • https://stcc-sa.com/motakamel/Ups/files/tesomidekava.pdfIn PDF document text
    • http://mujuerp.com/uploads/ckeditor/files/20210526225728.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/7dd1ec2c7023ea563e5fdeee11268933/78281804544.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/jebubotoz.pdfIn PDF document text
    • http://thangmayedex.com/webroot/img/files/437028421.pdfIn PDF document text
    • http://jandenzobv.com/image_uploads/file/79057717364.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/78763906606.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fcf00bfc89---wifojiloful.pdfIn PDF document text
    • http://grabnerestriche.at/66994956982.pdfIn PDF document text
    • http://deficanderel.com/clients/6/67/674a09facce11b7629d390eef9534ff9/File/89081765709.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/469a70d11e0fc756a2d4702dc4f8c84a/36054489986.pdfIn PDF document text
    • https://dineflon.com//files/lusizepokukixime.pdfIn PDF document text
    • http://skomi.ru/img/files/file/mavisuzovutowenabipijura.pdfIn PDF document text
    • https://aquarell.ro/userfiles/file/nutiwilotazupeb.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608460751cbfa---77021808824.pdfIn PDF document text
    • http://guerrazzi.info/userfiles/files/46680739243.pdfIn PDF document text
    • http://kamennykoberec.eu/editor_uploads/system/files/donedomo.pdfIn PDF document text
    • https://wietsevoermans.nl/ckfinder/userfiles/files/11385952218.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/dosajutanesokukudotibewaz.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160e305082beea---50669410284.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/6c246e7f01666253d23147119145f4dc/5494524523.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_off0000f706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF706 17208 bytes
SHA-256: 12bf6f7907cd43de2b67ed2623ceffc7fbd720845f2bdc6fcabb961077d106ae
font_01_sfnt_off0001240a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1240A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013c21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C21 10552 bytes
SHA-256: e1bd41efe09a83e1be78916ffd0fdb1650ffe4a32de14604badad191b7788df1

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