PDF malware analysis — malicious · 9b03b1ff8aa557fd

MALICIOUS

PDF

86.5 KB Created: 2021-09-04 04:58:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02

MD5: e9b835ae42e021ff172d9b5662c78b5c SHA-1: 5de0b85a4e0abccbded5103b401393b9fa3d9986 SHA-256: 9b03b1ff8aa557fdd93a625837b7b2d5e315d07a292b15c607db359c2cc903cd

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm pointing to compromised CMS uploads. The PDF contains numerous URLs, many of which lead to potentially compromised WordPress sites or disposable hosting, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the PDF structure and URL patterns are indicative of a phishing or malware distribution lure.

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 http://cgl.lu/userfiles/files/rojofekutoje.pdf In PDF document text
- https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9eb965f92e9208f54bcdc9b9e4354c81/1626413869.pdfIn PDF document text
- http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16070aa7770521---xedevotapemumuvumu.pdfIn PDF document text
- http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609268cba9c18---kuvel.pdfIn PDF document text
- http://zonazero.es/userfiles/file/ripakuge.pdfIn PDF document text
- https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/d52aff62f450d97a2908549113caad4c/12237776503.pdfIn PDF document text
- http://bannermaul.com/userData/board/file/7331993262.pdfIn PDF document text
- http://banphimchuot.com/userfiles/file/12760069382.pdfIn PDF document text
- http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ccac5b3cc45---kaxinotugumojikege.pdfIn PDF document text
- http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/90319379877.pdfIn PDF document text
- http://windmill-bv.com/userfiles/files/28548379902.pdfIn PDF document text
- https://aftaplan.com/works/peepsparty/html/upload_files/file/vomewisupukudokis.pdfIn PDF document text
- https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/2ddf25e5be8ac94e55218510939b5e1a/jesupimob.pdfIn PDF document text
- http://playitdirect.ca/ckfinder/uploadfiles/files/96165320405.pdfIn PDF document text
- http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2f40bf0ee---16385346937.pdfIn PDF document text
- http://tumwebthailand.com/ckfinder/userfiles/files/88864582840.pdfIn PDF document text
- http://benrassam.com/uploads/files/70526203214.pdfIn PDF document text
- http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16114e4f600334---36468938874.pdfIn PDF document text
- http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/18504243925.pdfIn PDF document text
- https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/e257f3e9a9edefb1f9e9a59b77860e96/dixina.pdfIn PDF document text
- https://batikatravels.com/userfiles/file/rovoperesijigarimad.pdfIn PDF document text
- http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/l7ce8ommuergovuhrp91usods9/bejeguwotileji.pdfIn PDF document text
- http://accronline.com/userfiles/file/jobas.pdfIn PDF document text
- https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/9ljlrcou7jqbsvu2g4e4hs60l0/relopiradutadu.pdfIn PDF document text
- http://bouwbedrijfbouwheer.nl/userfiles/file/2451046684.pdfIn PDF document text
- http://rld-carbon.ru/file/80103901659.pdfIn PDF document text
- http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e459e49a08---ropaxodabudepura.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=energiestrategie+2050+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_off0000ea51.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA51	18920 bytes
SHA-256: `40a6724971a6abcd81ad1b38fd65ad9c58994d18e021155d0fdce924e9fee730`
`font_01_sfnt_off00011ada.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11ADA	10864 bytes
SHA-256: `e17d5ac6642782d9011b1b3d2227ce15c1b21c53561ab795564b7985b0fd93a1`
`font_02_sfnt_off000133f2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x133F2	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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