Malicious PDF — malware analysis report

Static analysis result for SHA-256 9feb3aeea6f082a7…

MALICIOUS

PDF

80.5 KB Created: 2021-08-22 09:56:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2e294b20f7a9eeb7d5b8a7e04e3aa746 SHA-1: d2db2405764366dc050523c097a4401ce2b7c372 SHA-256: 9feb3aeea6f082a75179566498ccf1d230e9d4348b751a523e340b66f2c6fa04
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The 'SE_INVOICE_LURE' heuristic indicates the document's content is likely a fake invoice or payment scam. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving the download of a second-stage payload via the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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.
  • 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://oniceh.ru/uplcv?utm_term=telugu+chakka+bajana+patalu+videos PDF link annotation
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/3f87c54bd0c0650c7697ac50d40fc06c/taxexubebexe.pdfIn PDF document text
    • http://meuble-tunisie.com/userfiles/file/kobilukaraxivabi.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160754cc46d690---dikomepoluva.pdfIn PDF document text
    • http://dwallacelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/koxapivejil.pdfIn PDF document text
    • https://zbmbudomont.pl/userfiles/file/fumagupelevuzula.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077b7cb67b9e---96220920115.pdfIn PDF document text
    • http://improntediteatro.it/userfiles/files/60937411381.pdfIn PDF document text
    • https://associazionedynamica.it/uploads/file/65002516000.pdfIn PDF document text
    • https://businesslife.com/content/files/45818671931.pdfIn PDF document text
    • http://halmar.info/userfiles/file/dekapoxojog.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/ridemerovuliza.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/b5de82a4f49890725e2de8008174f8f7/wevaverupikazaxax.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/31ca5e3598f4b4ab89fbd3d43f57e178/vesiguf.pdfIn PDF document text
    • http://duonglaohanoi.com/userfiles/file/jesopelaruzulegisomagi.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/sevufizakesog.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/40512058435.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/pedimemuvuxan.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/7d6fdc8e6176e9d6a090362b99d94f7d/tajofetiz.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609413124aeca---16062103449.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/pujojigixisab.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/2404a1ba1022e3fe024bb0483b06496b/53739778613.pdfIn PDF document text
    • https://abctranslink.com/ckfinder/userfiles/files/wuvokazugajuvuwikajuwif.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/15cfcdedad05f2491e1337f76342bbcc/fanakejiko.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/342c7eda8ae0d314ec62ba51a26631e9/bavaz.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_off0000d3bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ebd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD1 17612 bytes
SHA-256: ce081a659c1101cbc40d27626caee1ec9cb1db5bf8e771c9c83640a8239b7e17
font_02_sfnt_off00011a3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A3E 11184 bytes
SHA-256: 38a58ea41f95deb48e8bc6e1177b440d0f36d8a23068ec79ec3a95b543f3a471

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