Malicious PDF — malware analysis report

Static analysis result for SHA-256 2086cd999c379122…

MALICIOUS

PDF

83.6 KB Created: 2021-08-03 08:53:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 7a7550772a5c6bd6d1bf7802113f32a4 SHA-1: 55f2a784d552e5f833fd5198d66fa9c420d9b32c SHA-256: 2086cd999c379122b0b96bc5968612c9d7d438c13e86dcff34478f1aa7bc013f
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, indicating a link farm designed to obscure malicious destinations. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aab29a459bb---suzadamozajumulor.pdf In PDF document text
    • http://piazzademarini3ge.com/userfiles/files/84682440195.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/2e7045d4af2e6baa61288327fe682680/92462160689.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c2727570813---fakonisanunokuzajezeg.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/3ff708cd2e51e4835cf32948bea41d4e/bejurus.pdfIn PDF document text
    • http://slbreakingnews.com/ckfinder/userfiles/files/dorozewapusafakatojoso.pdfIn PDF document text
    • http://ranaghatpchsschool.org/userfiles/file/lunaxutimadojepurerofa.pdfIn PDF document text
    • http://mizuho-co.net/file/ck/files/nawekugus.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/fb948a372ca77b7343105f7f628b6e98/29845739295.pdfIn PDF document text
    • http://sochisushi.nl/survey/userfiles/files/mosinaxadomujititatafoki.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ad3c4b4600f---49548837556.pdfIn PDF document text
    • http://refinerlink.com/userfiles/file/80013091587.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070710643b51---ladisinufusuro.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606d06cf8e378---37333110852.pdfIn PDF document text
    • http://beijingbeat.com/contents//files/navano.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/f7270134de146b1859e4d3aab3852b27/dofuvomofimavenizunesude.pdfIn PDF document text
    • http://www.tomasjelinek.com/img/pub/file/21302418367.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/bubulafuzu.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/rusekujobomabutebakafi.pdfIn PDF document text
    • http://robotsuk.com/luckingbros.co.uk/userfiles/files/kijidolidulamipifabizilok.pdfIn PDF document text
    • http://www.golfusa.be/userfiles/files/noxugatojinogena.pdfIn PDF document text
    • http://chipgene.com/image/files/20210703_014500.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608901d297a25---sedevorubasugirogoto.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=catalogo+price+shoes+2020+sandalias+pdfPDF 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_off0000dd47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD47 11172 bytes
SHA-256: b2a63b6312a14ead70e6ff90cbd641267d571ee1556ead64d7f0a222cccc11c1
font_01_sfnt_off0000f73a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF73A 18456 bytes
SHA-256: e5dbb54fc4ee58c14bfbc3f3b54f5388f1b97061a4e8452b83d65b35b20f3303
font_02_sfnt_off000126e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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