Malicious PDF — malware analysis report

Static analysis result for SHA-256 3006a6b18860eaa4…

MALICIOUS

PDF

83.1 KB Created: 2021-07-04 16:56:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: af019c4c34cff5139c8711ff3bd354ff SHA-1: 02489844342caeb7f147d7b4febb2dd4f51c88c0 SHA-256: 3006a6b18860eaa45422a1a14cabaa5f04788f5db91751f2b1f3d7a0b51e9c71
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document functions as a link farm, directing users to numerous compromised WordPress upload sites, likely for phishing or malware distribution. The presence of many distinct hosts and links per host suggests a broad-reaching campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/e094c3c6dfddf2da0c70abbd449834a1/63970920838.pdf In PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/7be92a68f5624ff7027d98d7be5d1118/80002456995.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160817fcc69416---83326566164.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160923cc973ba1---6988083497.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/38953245373.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609081908fcfc---wobidefesipufun.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606c79d872b8e---talasulewasiviluluxog.pdfIn PDF document text
    • http://ge-mak.com/files/45992249203.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/0e0d49b86eb98fbd14ca4608cce18523/wifamoviwinibiluz.pdfIn PDF document text
    • https://monyetjoget.com/contents//files/24780957285.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf15793aa4---lawenozuludibu.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160b30a696155f---85498452841.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160abda242e401---vujedi.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/17025046387.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/vagiz.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/61721320349.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/gunitaberalarifosuz.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/190a612d9203e3bb230a06781ddb6c5c/puvujulemirex.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6bad065b0d---mugagunaxigenazaxusavu.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/08b4de07b897e986e2a4b29ceeae1862/nifoxoj.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094bfa319f2d---vekekorumiwosekavero.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160792626370de---90928797834.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608008b566d26---vuretimudigawene.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/95270102088.pdfIn PDF document text
    • http://renovator.cz/files/file/kovufokoruzuzu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=the+earth+without+art+is+justPDF 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_off0000e384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE384 10336 bytes
SHA-256: a666c95b26a240b960074ef2cbbc4a098cc489a1f62f94e6e13bcb89c2ac6e62
font_01_sfnt_off0000fb03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB03 16992 bytes
SHA-256: 5042f5e5541ae21d9115244662228bf31965c8550ba01d8dc20ac590e175d4fd
font_02_sfnt_off0001273b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1273B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1