Malicious PDF — malware analysis report

Static analysis result for SHA-256 05ce7c90ea9d501b…

MALICIOUS

PDF

70.1 KB Created: 2021-06-10 12:22:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2cf5e4c88325090efc14398575a07992 SHA-1: cb70da2565f6c2bbba6f944e09ce0bdfb40d25c8 SHA-256: 05ce7c90ea9d501bea4c6de4836349e9783d5f7a826ad587323bb00e0b8bda75
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous external links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the overall structure indicate a phishing or malware distribution attempt.

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://infrive.ru/uplcv?utm_term=nursing+care+plan+for+severe+pneumonia PDF link annotation
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/aa8ab79345eeb3a8a0927215a72b2b7a/xavumalixamimi.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/3fe3c48ba34cee06bd17f40a7410ba7d/85614119949.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607504017de9c---sasobogetini.pdfIn PDF document text
    • http://eksan-ltd.com/userfiles/file/fopogigelojudiwofurix.pdfIn PDF document text
    • http://au-coeur-du-temps.com/userfiles/file/34962279118.pdfIn PDF document text
    • http://whalesart.com/uploadfile/file/%5C/2021051606242435.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/vi0cqjt9fnpsaia714bcu623kf/kugirobusoduledo.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/57122856276.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/uvqlcllcljldbapl8qrqtrmce2/81610785945.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/35872d45e50b335c3a7c80bb89384f4e/movadefub.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/d1c5dc3a7eb1bd0afe1cc33793094aab/xigozarewipasojodena.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9d9f12bc1---fokolukevenudebibotasafe.pdfIn PDF document text
    • https://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/90277cc2dbf4ce1a0309cd113a98880d/39755187930.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608dccc149d2a---33011672248.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607e80302b5f5---40158587922.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/rlier1qlcslgm0im7th7s6l0tt/74740045141.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210517164828132.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_off0000d79d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD79D 5364 bytes
SHA-256: 69d6ac889cc4a590cbfd09e5ff0763ee564942380432393a7eca345960f7ed56
font_01_sfnt_off0000e9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DE 9780 bytes
SHA-256: c02f391eeb27ab02a2aa54498c90bb8826a0559aee3203f8cfdcb84338b1fdff