Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d736b6b4e2e080b…

MALICIOUS

PDF

74.4 KB Created: 2021-05-27 15:48:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 96b0acd6162d5fe8f03dc21b4c250cb6 SHA-1: f2cb5ba44658d79afe8c90492905d43eca85a048 SHA-256: 6d736b6b4e2e080b53c1fc5848634c56dcdd9b7f58fecf5108924e93e667ac46
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a link farm pointing to multiple compromised websites, likely intended to trick users into downloading malware. The heuristic firings indicate a high likelihood of malicious intent, with ClamAV detecting it as a phishing trojan. The embedded URLs and the nature of the link farm suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://coretry.ru/uplcv?utm_term=charm+city+kings+soundtrack+zip PDF link annotation
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a50b4c5170d---mutokegidunipoba.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/69de1b85e44e88cf2b23b4533ecbee0f/zimaveritenifejed.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/85842337176.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609447ddd977d---mipubulimisatatidib.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608613060e5e0---levepuludisapi.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/64248ee6663d1ad8c94ea61897d021df/bomafilo.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608dacb4294f1---vasutadametenur.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce469e624d---pesatazotobefowifanizeril.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/1fc46c10e2263858d8acc1b0eb60ef15/vevega.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d56cea1c4---luvixurajidu.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160890f07ee1c3---21256202624.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075956b5309d---47051351618.pdfIn PDF document text
    • http://belgium-ex.com/images/blog//file/wepulubupo.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160700ff2a1cee---17212565582.pdfIn PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16079bf93bea87---3277051381.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/cqn1ceqrbi7r394iro08pggl22/jufimaxu.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/98db7592676982f02930441c41f0e5d8/mofoxosepusulo.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5442ca16e---nexeribezalojikosik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AC 5576 bytes
SHA-256: eacecad392bd90f3cc07ecff5f5be07724cfc9eee638be106dc6c3b97a367b60
font_01_sfnt_off0000f687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF687 10620 bytes
SHA-256: 5b6c81cf3af50010ecd3cb8271a28d307e5d23d8ce1422a24d35170cffb5e803

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