Malicious PDF — malware analysis report

Static analysis result for SHA-256 def087b70d3ad691…

MALICIOUS

PDF

102.6 KB Created: 2021-06-29 01:12:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 1de503efdf1aa23adb10949f051ac715 SHA-1: 747571bafb6653b2ed7234da620b75cad8d5080c SHA-256: def087b70d3ad69134269d883b53c17576f622e6cd1e198cc499684b55e18002
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous external URLs, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to direct users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • 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.
  • 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://garglob.ru/uplcv?utm_term=types+of+firefighters PDF link annotation
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/p8eb9p3skjap2e5limfdnekkji/ruwavokofozoxoro.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c47fb40a6d5---89619515638.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/vj3akfbuod597bmgs25hbu0d7c/96900072379.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/97fdcee750097a5fe88e8ebbee55c345/77512151334.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083459e4c4de---69049707139.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160904c8446788---jatolaxipemiregugojariz.pdfIn PDF document text
    • http://jp-cable.com/d/files/79586367124.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1f21823f0---wegirixugomimeni.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/n8h46tfb8rfp1nku8ohu6thml1/27377644650.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1371b2c90---53187882742.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/file/duxifuxegotamelajam.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a0f29477a38---bedigivirus.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d073b9bf33e---15942396464.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/351e54c94552719f6d974c1d87c14a22/duninojodanojutasexoxuto.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/zulobisezoxogagog.pdfIn PDF document text
    • https://cevhertemizlik.com/userfiles/files/8887197070.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be009169b29---41525853878.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/p5b6nc7jtome6r4fef0p8b29n0/zawomotode.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/6a1147057271212c90a23129416db7c9/98119120379.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/de4fd3811fdfef6a9ca10727161f1d10/mulutisa.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa4adafddc---52545906104.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/6358973411.pdfIn PDF document text
    • http://minicabii.com/survey/userfiles/files/jotabalufe.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba563981b23---65056525125.pdfIn PDF document text
    • https://krassimirtaskov.com/userfiles/files/35159510746.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_off00013067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13067 17176 bytes
SHA-256: c71eadec0a55fc53fb9c6cc6e215735bfaf5e2df93d7f64d34e2f5d754db2256
font_01_sfnt_off00015d30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D30 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17547 10404 bytes
SHA-256: b0767809828fae4cba8763c0e99f8445fe87b780ff7380a2fe7743eecbb64190