Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fec0897cbd077b4…

MALICIOUS

PDF

80.4 KB Created: 2021-06-27 22:09:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: b12bc7d877ec9535c4479166ddbb6864 SHA-1: a247551acbb95f8506344a077e9e3f88aa0e0e76 SHA-256: 4fec0897cbd077b40ab6589ae482e1e55f063faf180c2cc86e5664c9bd4a6195
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, likely intended to host malicious content or phishing pages. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for these links, further suggesting malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a8bf191b07b---34213491242.pdf In PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16092987022169---mizifowezubutikudezoxe.pdfIn PDF document text
    • http://tantex.org/tantex/tantexuserfiles/file/87851792385.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abb1da8d810---tuxobagebatatajemegejuxuk.pdfIn PDF document text
    • http://bioscipublisher.com/files/upfiles/file/83393174454.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/ss566q7aplssg3b6cjulqigi33/80187197116.pdfIn PDF document text
    • https://protradingindia.net/userfiles/file/68207009410.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a54c61167---61709985035.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd1f34fb39---56555006403.pdfIn PDF document text
    • http://bettaletroom.com/file_media/file_image/file/46068947994.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160826990dccc5---lewikatitegamitob.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/5832867812.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/a8a4ced5fe47f0d3ff34c1c1bda3e2ed/zamefop.pdfIn PDF document text
    • https://bkht.vn/userfiles/file/ralubunuzevesemom.pdfIn PDF document text
    • http://digitalpolicycouncil.com/imagenes/file/salexabadilunonuruto.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/5aac8dcfe5967b7e6dae48c6b4618fb9/5595205679.pdfIn PDF document text
    • https://rosedreamholidayhomes.com/ckfinder/userfiles/files/mafuz.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e617a1890---38240423481.pdfIn PDF document text
    • https://estoniapools.com/contents//files/16108448752.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/cfjlfmiadtmnasb8o7s3qqrnjf/petesedikizal.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/3066e72078b5c0af92916630e91f52df/56644167447.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/24f8dbfbcdb84b1cb463168c17b37719/21420810180.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=vitamin+c+and+miscarriagePDF 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_off0000da3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3F 16520 bytes
SHA-256: 74307b734575119bf01840078d47a6932ca958ad4bbf9ad86a352407201226ed
font_01_sfnt_off00010506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10506 10516 bytes
SHA-256: 721d31e9e8cdace9805e012b1097a14c5afb72217bf965877aca169ced41f36a
font_02_sfnt_off00011cc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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