Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e12dfe0bc6436f0…

MALICIOUS

PDF

72.1 KB Created: 2021-09-02 08:05:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5cd9895d662acdb07068d26d1b4c20b3 SHA-1: 593c2d1d8ff70187c68cdc360aac65deceab9de2 SHA-256: 6e12dfe0bc6436f08c48d50a15d3cee5ae8296fa428048d9135408a2e9dd9fc1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to lure users to malicious sites. The presence of embedded URLs and the nature of the link farm indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/12c3510a2acee40f2c5159736a0adfac/56428280869.pdf In PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16100e4b6a3ef5---64619239145.pdfIn PDF document text
    • https://groupburuemas1.com/contents//files/koxik.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/dg1booq8efhj9vsbgcpfopdsru/95843335169.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/e4b6767a660e5b95827bdff264c9b95d/sipeginiziwuxugimedolope.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa5df6050e---57646493470.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c984ae50217---89996555935.pdfIn PDF document text
    • http://studiotravenzolo.it/userfiles/files/1790753688.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/b39c796e714c754cbbc2355d4e0fe2d9/47087350673.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096e7ab67bd5---16142628111.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160744a4e15840---fulematibazupo.pdfIn PDF document text
    • http://rigassprotes.lv/uploadz/file/jiviwewalusumuk.pdfIn PDF document text
    • https://salvatoredivilio.it/userfiles/file/82696807500.pdfIn PDF document text
    • http://domki-kopalino.pl/pliki/xinegoxareduberegad.pdfIn PDF document text
    • https://blugarden.eu/file/satar.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/67497293647.pdfIn PDF document text
    • http://grossfamilyreunion.com/clients/0/00/00c8ca1d7e0432e0ca4c178cf0a97985/File/97064123865.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609d93aa58e08---dovumaginizunu.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098bd054b700---97777725506.pdfIn PDF document text
    • https://classicandcamper.co.uk/wp-content/plugins/super-forms/uploads/php/files/fjdkbhtd3pcgolnv59ea5vcpcj/24651143457.pdfIn PDF document text
    • https://hantverkarenisandby.se/UserFiles/files/85431086380.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/9cbos60adrqtfgsirn3f7t483r/rozame.pdfIn PDF document text
    • http://dgjst.com/upfile/file/19605571166.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/5cff024fd18588f78900cfa3170f0610/78772383158.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ade870d7a3b---66295943296.pdfIn PDF document text
    • https://open-call.fr/uploaded/files/25082570048.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/lalaxubamewe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=funeral+home+receptionistPDF 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_off0000b979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB979 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD190 10716 bytes
SHA-256: b00cce8b2b1dc8e57799b35f7adc7285769aac148eefc886ccc118ff4f25cd41
font_02_sfnt_off0000e9ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EF 16148 bytes
SHA-256: 346c04053b37b585af76eef8bbcd649ac841c726a098d36e6bff22fb84bca57f