PDF malware analysis — malicious · b6dc6a0d6d1ee946

MALICIOUS

PDF

87.1 KB Created: 2021-07-03 12:21:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 13b4eb226e184c397fda2863723d3302 SHA-1: 440909a2f8b04870619e215b0346c61c82fc39a7 SHA-256: b6dc6a0d6d1ee946fd92f5d640fb8aa3964f6c2ff73cdbb5cc9a684ea22f4c08

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1055.012 Process Injection

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to host malicious files. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple distinct hosts hosting PDF files suggests a coordinated effort to distribute malware or phishing content. No scripts were extracted, but the structure implies a lure to download further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

Heuristics 5

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://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/edbe0eddde6a5597abf8440645a7719d/xadoxu.pdf In PDF document text
- http://buchtel1967.com/clients/26382/File/foziviv.pdfIn PDF document text
- https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607484d344ade---tededelukufasi.pdfIn PDF document text
- https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/0b8b8d663a215c70339c5fa53879f7a2/67448264689.pdfIn PDF document text
- https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/ua8gmnja5j9koijrns07mr44vd/58644007642.pdfIn PDF document text
- http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cafccd67806---jirevavigekizukije.pdfIn PDF document text
- https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/037b1ddc50ad9cf95bd33245f5c8fd39/kedesep.pdfIn PDF document text
- https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/f9456cafc94ce3384a1e59483a6e3a21/sepade.pdfIn PDF document text
- http://sity-luxe.ru/userfiles/file/19813312109.pdfIn PDF document text
- http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608acbf6d1abd---zugamelimafadinadogeti.pdfIn PDF document text
- http://cinstech-inspect-survey.com/fckeditor_userfiles/file/79800428841.pdfIn PDF document text
- https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/3lh9ph9irb0up89q4i3d67q8i6/44792484867.pdfIn PDF document text
- http://pogologistics.com/ckfinder/userfiles/files/pamododofebekuvokere.pdfIn PDF document text
- https://gruntbudowa.pl/files/file/bumevaridokimekapot.pdfIn PDF document text
- http://grafichesirio.com/userfiles/files/2927071696.pdfIn PDF document text
- https://personnelcle.com/userfiles/file/3493102085.pdfIn PDF document text
- http://bhttourist.com/upload/fckimagesfile/50383852240.pdfIn PDF document text
- https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b518feaf462---55307023242.pdfIn PDF document text
- http://amdind.com/userfiles/file/60616113377.pdfIn PDF document text
- http://toyotalongbien.org/data/dulieu/files/52971428826.pdfIn PDF document text
- https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/b93bf3abf21fc037544dcac9eefd29bd/10066593615.pdfIn PDF document text
- http://automsystem.com/UploadFile/file/20210503101744749.pdfIn PDF document text
- https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/6bb9e7804c90f3cbfcedf6309fbf68c0/jodizalanizibutuvan.pdfIn PDF document text
- http://booklandbooks.com/userfiles/file/85420308250.pdfIn PDF document text
- http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ac224998e3e---damekoboworekofiropusow.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=solidification+in+casting+pdfPDF link annotation
- http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/571e32a46e015162f917bcbcb63d8daf/mufiruwironudeno.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ef69.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF69	10636 bytes
SHA-256: `a0f788cc524acecc2dc2274f60ab82f7ba2e4b325df0c3000584f0d775b6942c`
`font_01_sfnt_off0001079c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1079C	17908 bytes
SHA-256: `d623a4bf2f5bdc8d7f1340d463c13542c2d4e8d9d217d6a5c7c7a5b65fc50033`
`font_02_sfnt_off00013579.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13579	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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