Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d10c5556945be96…

MALICIOUS

PDF

91.5 KB Created: 2021-06-28 08:28:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: c7f6b369f27cd40e833aa9dc22e8b213 SHA-1: af116139988e51738d7b63ff2ca0326a5975f875 SHA-256: 6d10c5556945be9654f1d9c18f4bfe1eda0166be73b0d1921219872edcd6f3ef
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://facades-et-traditions.com/actualites/file/sonazodozasonewadagilixo.pdf In PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/b9008eb131359bea3e368ce0bb5a66a8/xesuvavubetuderuse.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078df5363b76---wuganolaxoporotizipo.pdfIn PDF document text
    • http://cancercareresearch.com/userfiles/file/48780074699.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160959ca0bf826---lesesipi.pdfIn PDF document text
    • http://portalkucharski.pl/app/webroot/media/files/misixu.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/jipemukipotejalolima.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/8ad2a0c9a9409ace73d65c11cb33eab7/faxujuvoxusona.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f0b7b461a---26483068349.pdfIn PDF document text
    • http://heibldr.hu/FCKfeltoltott/file/60639170222.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9b43fa240f93932772d8d27401951ed9/vujukekawikagupelixefasus.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f71e297d24---giwokidipikurujone.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/1f116ccc08cdf60c31d92b43373dc9b9/81668067048.pdfIn PDF document text
    • http://dansensvenner.dk/imagesfile///xegogitu.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098415157e1c---63484391934.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/46d4b7b938b3434614a19b040f117ec7/44699227418.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7e1dcea0b---4928019500.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/2e67559154752f2a5202c567163cbced/5662145991.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/d4074ac93229cbe6571a9bb6812d1345/68887491099.pdfIn PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/ditijedoxote.pdfIn PDF document text
    • http://qlinairnv.be/userfiles/file/50141829214.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/11241040483.pdfIn PDF document text
    • http://littlepearlbooks.in/data/eimages/file/92500063649.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+craft+guns+in+terrariaPDF 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_off000100fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FA 18232 bytes
SHA-256: e6a7a885bc4d7f2b1dc6163b1ff118f75f645ccefd166cb2c76d5dc1d9a40d39
font_01_sfnt_off00013028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13028 10644 bytes
SHA-256: c6775dc501fe1b6f0359c49ccb8e5841d00627bd680d9ba6419fd05a9deae176
font_02_sfnt_off000148bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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