Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec93c7aa95e792a0…

MALICIOUS

PDF

106.2 KB Created: 2021-08-16 01:23:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 033e8894ce308c27eed2b2e1e126c5fc SHA-1: e7db243c45532033593362e6717c9cf67f4ac9c9 SHA-256: ec93c7aa95e792a07be19976589037fdd68d9dc01849bdc80b30d557ae28ad41
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous links to compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of external URIs and link farms points towards an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://catamma.ru/uplcv?utm_term=guns+germs+and+steel+episode+2+answers+quizlet PDF link annotation
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ab75d7242c1---laxaxomun.pdfIn PDF document text
    • http://xn--b1akwe.xn--p1ai/userfiles/file/luwif.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e44e14f6cb---jokekal.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/i3nrgmcasutlre9dao64tnkf8o/73928210616.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9e5aa6d06---53315597976.pdfIn PDF document text
    • http://bong-dem-long.org/upload/editor/files/kejofimurijetajasufab.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bb03192aab7---sapuwomukuvi.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b3b44812fd2---fewaditujuxivinodena.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/o1sprh4mjjj5946hq5v9dult47/44154153112.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a30aa374958---nuvidufovuti.pdfIn PDF document text
    • http://vaness-sens.fr/ckfinder/userfiles/files/zebodovux.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/a049903af18f318368c96525dfb3eb10/benajebokukewusorawizu.pdfIn PDF document text
    • http://ijdssymposium.eu/upload/xezadinolumunuwilidek.pdfIn PDF document text
    • http://www.sospapa24.com/lib/ckfinder/imgupload/files/xobizik.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/cf6ef69911b2d4632ce2122c60d1f1b8/voref.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/add6426fd50f6920bc21740989a26f43/22934581117.pdfIn PDF document text
    • http://dnepropress.net/files/file/74859405374.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/temudariki.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/7592390571.pdfIn PDF document text
    • http://masonhn.com/d/files/rogamopibunaw.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072f46dc2a8b---navuxabeses.pdfIn PDF document text
    • http://designpavelzapletal.cz/files/file/5382818196.pdfIn PDF document text
    • https://mbzl-pro.xyz/web/img/podborky/files/27299038000.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/106857c84f775073393ac9cf5586b99f/40012855717.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_off00013c18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C18 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001542f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1542F 11284 bytes
SHA-256: 6dcceb6fb0372373afdbf6d8fef3cc6003d75e30af878487051fdba72cf1206b
font_02_sfnt_off00016e4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E4F 16476 bytes
SHA-256: fbe331a1fdd9d6d4107af181c16da2c62f85359c7ec061bca87609a3e7b4cc0d

Open this report in the interactive analyzer, or submit your own file for analysis.