PDF malware analysis — malicious · 84cbca52ba554a7d

MALICIOUS

PDF

86.8 KB Created: 2021-09-05 21:12:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: f90c416ddff33736a225adb45eeeaec8 SHA-1: e0a308e0358259accecc557bef4807911d03f511 SHA-256: 84cbca52ba554a7d86c7383f38d354ca3c16f80b9cf97fbf904574a9ca37d0b5

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains numerous links to external websites, many of which are hosted on compromised WordPress sites, suggesting a link farm or redirection mechanism. The presence of these links and the overall detection indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9905

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://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/7a6ad8db381e0eafcdcb607e0150e9b9/butofamozuzavomimoratofo.pdf In PDF document text
- https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/3ccb3a23d2092bb1f1c5660dc269e907/xizavufalalelulodibikosa.pdfIn PDF document text
- http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df64463761---21074952992.pdfIn PDF document text
- http://h-p-n.fr/catalogue_dynamique/file/xoribapinevot.pdfIn PDF document text
- https://semineebrasov.ro/printuri-fi/files/faboxoxoligalovutor.pdfIn PDF document text
- https://mimpiindah88.com/contents/files/70530015398.pdfIn PDF document text
- http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160c19eeed8850---bidizudekoferovuwixuxor.pdfIn PDF document text
- https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/b9094e41674e3a059e1eead393718105/wutakikiz.pdfIn PDF document text
- http://moscowballet.ru/userfiles/file/20032894332.pdfIn PDF document text
- https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/79e539f4d395b2bca7bdfbf7a9d77f43/xamemaziwuwimetepasizumuv.pdfIn PDF document text
- https://suma.ca/upload/editor/file/vekituwexibo.pdfIn PDF document text
- https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160996a8b40788---javosefoxadixawinok.pdfIn PDF document text
- https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/fc41149e866c771a47e6ec702b9912c3/12954055155.pdfIn PDF document text
- https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9f08bf105a---sogunemofovisapo.pdfIn PDF document text
- http://hilltop1976.com/clients/24685/File/4319064122.pdfIn PDF document text
- https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/1212b4cc9a9131409026a7f69320658e/62370485090.pdfIn PDF document text
- http://strahovka66.ru/userfiles/file/rizifoxuvaseroletiwovo.pdfIn PDF document text
- http://mwflower.com/upimagesfile///60119228763.pdfIn PDF document text
- https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e628fbdd9b9---50691832296.pdfIn PDF document text
- https://viceda.com/userfiles/file/64779011573.pdfIn PDF document text
- http://global-insurance-broker.de/downloads/268509973.pdfIn PDF document text
- http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6bb463409---64016936260.pdfIn PDF document text
- https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/cdae7d7bd55c7e4e42912206286ddeca/88751700864.pdfIn PDF document text
- https://tranthachcaodanang.com/uploads/image/files/62563469292.pdfIn PDF document text
- https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/53169b50c6deb49688f25e544f696d80/forijimeb.pdfIn PDF document text
- https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/c05aa70132966b718be69d708adce19f/76653542203.pdfIn PDF document text
- http://baliretreatcenter.com/olabali_ci/media/images/newsfiles/1916491625.pdfIn PDF document text
- https://vestol.bg/files/file/muzimuwisusulofepe.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=wells+fargo+withdrawal+slip+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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ee43.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE43	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010655.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10655	17540 bytes
SHA-256: `fcbebc7c480adb66488648c61a35399027423ebe6f038f340a98e50498bbdbd8`
`font_02_sfnt_off0001343d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1343D	10752 bytes
SHA-256: `21ed0b9924ac6a4023d15b16d1977f6aae4e204a9cdd1c3c6558707aea2b40a5`

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