Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0d1199f5bb9ba8f…

MALICIOUS

PDF

79.8 KB Created: 2021-08-09 19:13:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c9570c7ebd9e96c25fff23fd0794046c SHA-1: 1fa5f519e150da9bb2a3ce128561097cfcce5cf7 SHA-256: d0d1199f5bb9ba8f6993c3d94a1a9677d63a92ee049fc56a7c60dbf12f5b046d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple URLs pointing to link farms hosted on disposable domains, some of which are compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for executing malicious code within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.
  • 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 http://bean2beenefamilytree.com/clients/60578/File/taxalagakigopibomenaxoxu.pdf In PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/woligipaxurefuposoletob.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608de52c4f5d4---65434225734.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/8imvk1r60q5k0vd9e4l601k9on/ratigimavisizebalexujo.pdfIn PDF document text
    • http://choinka4x4.org/cms/files/file/wixidizixigibaka.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/64187308510.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/16098ad4872dfd---45925317211.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cab5a321c48---40154623403.pdfIn PDF document text
    • http://jullien38.com/ressource/site-image/files/ziposibivavanevu.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16084bc55c2281---45714679261.pdfIn PDF document text
    • http://righetti1970.com/clients/872956/File/xidixomamobetobulokelu.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210610062708.pdfIn PDF document text
    • https://es21sys.com/userfiles/file/rinofovafixug.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16075c3c92f41f---xenaremobogipimuso.pdfIn PDF document text
    • http://4darchitecture.org/img/all/88112845254.pdfIn PDF document text
    • http://www.ramseier-appenzell.ch/elrada/js/ckfinder/userfiles/files/wonifewejagobixara.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/398t9ocsde91tffqg8gql88g4g/74757540272.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/2bf93c74f5d0238162e057f303f72ae4/98365476750.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/5330aecef41d6552eda17d0ae7e14f7b/5300917471.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/d22f112c64584b2b563e57cdeb0b93d3/92343456655.pdfIn PDF document text
    • http://craftland.de/res/wysiwyg/file/jizedojagutuvipareru.pdfIn PDF document text
    • http://homenet-spb.ru/userfiles/file/xexisutirimuret.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef3a592742---paduzotanawore.pdfIn PDF document text
    • http://www.mustwalge.ee/data/content/files/59761493346.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=diya+aur+baati+hum+serial+episode+100PDF 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_off0000d159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD159 11084 bytes
SHA-256: 2eb2fb19005870ce17965954cb436965b4a74e439b4b2610a62ac7c2af19b41a
font_01_sfnt_off0000eb0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0A 17080 bytes
SHA-256: 5e988b7a8dae79daa78f5c303c21af58fb6b2033e7917f79fb3c30bdaccd049c
font_02_sfnt_off000117e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1