Malicious PDF — malware analysis report

Static analysis result for SHA-256 70dac46aeee1ecce…

MALICIOUS

PDF

78.3 KB Created: 2021-08-29 03:13:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: e8e5dcf1c4b19f33a8fc48a6e6a44fe8 SHA-1: cfd53d11af44b55ca7599645217f83093a4efe61 SHA-256: 70dac46aeee1eccea11f269eec305fb6eb45ce5c26990819a7f3b8063cefae47
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://studiomilano.eu/userfiles/files/sazitemejuvuruwufemepimer.pdf In PDF document text
    • http://hidramaco.com/files/files/92971577818.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160903f76947b4---9761873324.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160826d27bb527---53263699863.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///957088987.pdfIn PDF document text
    • http://auldskoolrocks.com/clients/878384/File/wipova.pdfIn PDF document text
    • https://drvishweshwari.in/userfiles/file/2536259543.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608690f20e4a7---burufofubepegiri.pdfIn PDF document text
    • http://pattonbrayboy.com/clients/8/84/8444fd18e659e4cf0f5d78ff5dcadce3/File/bigoditoleve.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/cf4e6efad1f10546435875678cc3ea1c/funaxitekufowofibugalej.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/0q4jmqhi5gpt8ufvbeam569ea1/21571714717.pdfIn PDF document text
    • http://autoshiftbid.com/fckeditor/userfiles/file/84098399175.pdfIn PDF document text
    • https://igruppe.no/ckfinder/userfiles//files/sanituvutegopizipesotebi.pdfIn PDF document text
    • https://peintures-descours.fr/fichier/files/34987464074.pdfIn PDF document text
    • http://qctc.vn/upload/files/72222387672.pdfIn PDF document text
    • http://matras-devison.com/upload/file/21361010607.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/47303670938.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/b78a29d35d6b36bc6d78183747f485cd/72908203138.pdfIn PDF document text
    • http://prvugkh.ru/uploads/files/wuxiwapuridasemunolemoma.pdfIn PDF document text
    • http://unsersohn.ch/images/file/35984743983.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160818d8b827ba---51160932411.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/6b081ff2b1cf2ce22802edba9fbcd305/16509264058.pdfIn PDF document text
    • http://plymouth-logs.co.uk/ckfinder/userfiles/files/lobutu.pdfIn PDF document text
    • https://barcelonacentremedic.cat/files/galeria/files/69859490973.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=how+do+you+eat+raw+honeycombPDF 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_off0000ccb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB8 10760 bytes
SHA-256: 057065b89619aeedde4db3475af2d6182f85de4ec105b1ae977e748718ce56d9
font_01_sfnt_off0000e54a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54A 17648 bytes
SHA-256: 4d1b5c4bd23337e3c93d21546349fc6d5f26b98643abd8c3ec59da2121fcbcc2
font_02_sfnt_off000112e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1