Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bc056e969db8345…

MALICIOUS

PDF

81.5 KB Created: 2021-09-02 21:53:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 19f9b41f0e370b9f04de4a41a52a8093 SHA-1: 4076dc6a39e8bfd66da6450fa63a305d36e26b96 SHA-256: 9bc056e969db83456f259e8a84d29f23b1a7c3fef9cce848fc6013d720521600
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a significant number of external links, many pointing to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection or download of further malicious content, while the link farm serves as a lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/d94f2209b656730e4345f4323bd74b24/jefoveguzipawowuwu.pdf In PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607833076f9ad---loluzaguzasip.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/12879776841.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/497cdf406f6e862dd702857e20c6444c/kazofosaberazo.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/f4354bb4c22b973ecad0494857345786/28490486190.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/fq6mtjfgsoioov0kt0ssga8hqg/fadutelowujukixali.pdfIn PDF document text
    • http://tieclangman.com/Images_upload/files/sodorowowaw.pdfIn PDF document text
    • https://ka-base.no/images_content/file/95819715436.pdfIn PDF document text
    • http://kuppersbusch.hu/userfiles/files/74450310473.pdfIn PDF document text
    • https://zold-kommando.hu/files/jivokitumadulilexo.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16075edc6a66d6---49932517949.pdfIn PDF document text
    • https://avela.md/userfiles/file/546485804.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acd9b6e57d3---25723853746.pdfIn PDF document text
    • http://study4student.com/cache/fck_files/file/pefuwipapofe.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/ce5fe92c4d249e6045cca3a5a37f08d6/vapezipasusalojo.pdfIn PDF document text
    • https://shidoremicrosys.com/media/60392667150.pdfIn PDF document text
    • http://carscaso.com/js/upload/files/bijojav.pdfIn PDF document text
    • http://xn--k1akb4c.xn--p1ai/userfiles/file/zagopodar.pdfIn PDF document text
    • http://dedanskecasinoer.dk/userfiles/file/62693380191.pdfIn PDF document text
    • http://limobebe.com/userfiles/files/vijekiletabip.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f86517b6150---tuzunesunomosowugepamuv.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087826b311e7---7326691872.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=business+communication+and+information+systems+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_off0000d9ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AE 17208 bytes
SHA-256: 3e278287f3a0ac41b65e0bf8b2c99991f36f1df425b1ade85600cce5ffa483b3
font_01_sfnt_off00010622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10622 11004 bytes
SHA-256: e2e4488f8755644829429102762adefda91a74b8de1ea2f4c37d745e4112635a
font_02_sfnt_off00011fc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1