Malicious PDF — malware analysis report

Static analysis result for SHA-256 d09e0402a2fed9e3…

MALICIOUS

PDF

93.3 KB Created: 2021-08-01 09:14:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: fc0b4f11cfdc295f96a13ded9f9841fa SHA-1: 0918a3d774961d04136212ff570b8b4d65ad4dc1 SHA-256: d09e0402a2fed9e371b2b35b22cc8e57f186e5c241a3939ad6377917ac569a02
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing users to multiple compromised websites, likely to host further malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and numerous external links suggest it's designed to lure users to malicious sites, fitting the pattern of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://say-international.eu/userfiles/file/mapuvukomifopopoxa.pdf In PDF document text
    • https://havanic.com/cache/fck_files/file/84265428201.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/f5a148d078c5a68e23947ad4e29e2e6a/94267704896.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2ef22db4e---mamabofaworeroxelub.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/likegijunurepazapiba.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a18e89c1ab1---77344517831.pdfIn PDF document text
    • http://wo-kop.pl/userfiles/file/93460117708.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/53481a862f61213d0a66a9d15644c49c/29745503417.pdfIn PDF document text
    • https://mountainbrookbuilders.com/home/mountain/public_html/ckfinder/userfiles/files/gevupatobubotadar.pdfIn PDF document text
    • http://brno-skoleniridicu.cz/ckfinder/userfiles/files/sidabumaxetofuz.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a11825b7c7c---nusuxabipawuzinadefiw.pdfIn PDF document text
    • http://propellerclubsandiego.org/uploads/files/zafisolilev.pdfIn PDF document text
    • http://caratow.nl/userfiles/file/zuviwozunedutafarisefo.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609002b8a0d93---dusufaxuxifavatig.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078e8eb63950---11809347204.pdfIn PDF document text
    • http://fecoil.com/userfiles/file/26719275182.pdfIn PDF document text
    • http://slanfusa.org/clients/47225/File/42026588396.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609e926523db0---dovevumexaletofi.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d1a31107a1e---tilalamujaxe.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/98f3b722ddb713e106ba56b05249f8c7/gufifupegajiripa.pdfIn PDF document text
    • https://quangcaowebsite.vn/uploads/files/69265723643.pdfIn PDF document text
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/5b85d7b59c8825452de5db10240b1bea/rumuzo.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/jopufi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=how+do+you+use+a+5+point+likert+scalePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10747 17736 bytes
SHA-256: c1a2556f232233a24cc45c9daecfbf2a8020a4291aef4284a6e718b70092c52c
font_01_sfnt_off00013512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13512 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014d29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D29 11024 bytes
SHA-256: 5fa189a21998af56b887b5863dea13b3f18cf57ce068fdbd3396131a1737412d

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