Malicious PDF — malware analysis report

Static analysis result for SHA-256 07ff9d4b4a5efb38…

MALICIOUS

PDF

94.0 KB Created: 2021-06-27 20:25:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 6e1e6eac016427cd9b7a3a3c2162298c SHA-1: 7aeb74e73edc2aba60aafa00354548e1e95448a0 SHA-256: 07ff9d4b4a5efb38343d967fe041c9a575cc785f0ee83531659c391c93961e78
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://synerhu.ru/uplcv?utm_term=how+much+is+a+full+forearm+tattoo PDF link annotation
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb0f982fd2f---63832150402.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/b033b915facf79a1a53e76933f1e9ba0/55992506149.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/6023096875.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/50889861140.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/qfapdi2024tdgj4rmqnp4jn940/18315954703.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8da805c04f---gitivuxakulavog.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607fda283117f---26460960912.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d6ac92a5a---dowigo.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/wojavo.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160944d6084578---51513706482.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/23407199298.pdfIn PDF document text
    • http://penzionnakrizankach.cz/ckfinder/userfiles/files/liruzu.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/57456605593.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607255b338604---89067116024.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/58563361000.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/6921f78fe131ebc6cfdc45f9cb0d0ad0/vomatumipilefipo.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094da03793b9---rozinorufiwisevudisuseso.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/37e5f1bdaaf556ab8fbbff89d4290b4f/zosape.pdfIn PDF document text
    • http://www.tekkoo.net/images/library/File/lewudojoretewutanibupot.pdfIn PDF document text
    • http://mkngsp.ru/upload/files/31688838349.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/1sgcvk62bpsm0psuae71tlhod4/76837869093.pdfIn PDF document text
    • http://trendymamy.pl/userfiles/file/94084301860.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/7k5e88gfpt16mqgsjg5ltodkhe/54042303155.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/doligixopanuvunukoxajom.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

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_off00010db4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB4 10672 bytes
SHA-256: 5339addfa9164e0ac088b194c186bfd64acfa397e27b07610c0b6f272da2d3b8
font_01_sfnt_off00012636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12636 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013e48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E48 17060 bytes
SHA-256: 702fef14d918e323d735579d04af7e0e19d37b21976bff031c6bc355e2ddb8dc

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