Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ea8ca3d9d36f98e…

MALICIOUS

PDF

74.6 KB Created: 2021-07-06 00:27:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a2296d3a0cd576eb5d96faa10dfd53c5 SHA-1: 9849c8eed8291a4491a533f67c7d68c1b0e90cee SHA-256: 2ea8ca3d9d36f98e3cc2e94b0cb8781a051810dc7792bae94a9d2cb56da8b372
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 sites and disposable domains, a common tactic for distributing malware or conducting phishing. The ClamAV detection and ML classifier strongly indicate malicious intent. The file's structure and the presence of link farms suggest it is designed to lure users to malicious external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b86e5163853---52072792266.pdf
    • http://sofia-es.tokyo/yamituki-n/uploads/files/mirafugokadurumomubexus.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609891ea5349c---dasenurazusinifonatufilo.pdf
    • https://aashianarealty.com/file/mutazomepakixufukeke.pdf
    • http://whuntex.ru/userfiles/file/16286519035.pdf
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073b487af3d0---vitasi.pdf
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a05d1127aea---61175736361.pdf
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/3ef1691499b8c4e77c85751247a6266b/37019050659.pdf
    • http://e-skala.pl/userfiles/file/64893262171.pdf
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/6ab6a86057c218c91753aef06824aa66/4753961685.pdf
    • https://partnyor.az/userfiles/file/fonukufivevujogajekorola.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/c0a8228f55bb33c27017b5ba15c9e3a3/30520293018.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082402a703d5---gaxemududobebuweleli.pdf
    • http://good163.cn/Uploadfiles/files/14249059416.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/7beofbhisjaqlrv8584gir5f0h/vidufapodorotezebada.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bd67706a894---worud.pdf
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e4ca5784eb---80374628394.pdf
    • https://emauto.lv/index/images/up/file/17015277153.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608753cfb7f06---80619974291.pdf
    • http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/3708177351.pdf
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609904b5a6b4f---62527753994.pdf
    • https://yuss.it/file/jovarixoxum.pdf
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/424a98c4329ef1fd3c8c6e078c630766/91247301108.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=cost+to+replace+plaster+ceiling+with+drywall
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3b3.bin
e828df60770b40425ca86e8244b782798bb835208b0d8394501557b7db46233e
pdf-font-stream PDF embedded font (sfnt) at offset 0xC3B3 15660 bytes
font_01_sfnt_off0000eb6f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6F 16792 bytes
font_02_sfnt_off00010386.bin
15de7a5a048686260f45b3baec9418521185ab27c38d368a008ef19b5df8499b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10386 11024 bytes