Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b6e79f68f6f2551…

MALICIOUS

PDF

78.2 KB Created: 2021-09-18 04:18:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9821897606da306c646e70e35d998e7b SHA-1: ea8377fc7ef7d9b6cbf6e3bf7db556e2456807ba SHA-256: 6b6e79f68f6f255135ae61af0a6d692251b6ccb322c8635e61e9bffe456e94f7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The presence of external URI links and link farms suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 https://smidgel.ru/uplcv?utm_term=gif+birthday+wishes+for+son PDF link annotation
    • http://bielle-srl.com/userfiles/files/6893255098.pdfIn PDF document text
    • http://wsystem.sk/userfiles/files/37836400825.pdfIn PDF document text
    • https://autoteam.in/ckfinder/userfiles/files/falozujiluxutupadi.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613b6f1a915c0---26525056185.pdfIn PDF document text
    • http://kxqcgs.net/filespath/files/20210917025031.pdfIn PDF document text
    • http://basumati.com/app/webroot/ckfinder/userfiles/files/72126148485.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/m97dtu0jmcjvhu1n465rdtd0ep/kudaxowizogok.pdfIn PDF document text
    • https://artistprasanna.com/userfiles/file/16582268689.pdfIn PDF document text
    • http://bamor.org/userfiles/file/vosegifakiposud.pdfIn PDF document text
    • http://theofficefurniturestore.com/ckfinder/userfiles/files/36366032541.pdfIn PDF document text
    • http://gilendor.cz/userfiles/file/26318471579.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145362ce893a---33899120268.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/b4a1a8875b9b2ce4f971b4b39881a862/bujotakibofanowebunubin.pdfIn PDF document text
    • http://electronicaindex.nl/images/uploads/30851542351.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fea80d4c3d---53115293916.pdfIn PDF document text
    • http://stellarp.com/userfiles/file/66560546426.pdfIn PDF document text
    • http://5mal4.de/moneyvidya/web/images/userfiles/file/64391674074.pdfIn PDF document text
    • http://ecolservizinettuno.com/userfiles/files/panodaxemido.pdfIn PDF document text
    • http://sun-green.be/ckfinder/userfiles/files/48607351733.pdfIn PDF document text
    • https://odlingfamily.com/userfiles/file/retelebeve.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16141630de467b---2873459974.pdfIn PDF document text
    • http://shopgraeagle.com/ckeditor/uploads/files/62266995225.pdfIn PDF document text
    • http://mestan.by/images/file/lewosalidepezigofixebak.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_off0000cd57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD57 17332 bytes
SHA-256: c379a2b041c8a62233c9271fa2b840896d7a31a138723467c454ba007d75127c
font_01_sfnt_off0000fa6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6A 10784 bytes
SHA-256: 7f4a07cbaf3e671678622cc43972860c03d016f71930c60a10dde8bbc9a97545
font_02_sfnt_off0001134d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1134D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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