PDF malware analysis — malicious · 638ab8a0084253a3

MALICIOUS

PDF

87.3 KB Created: 2021-06-29 12:37:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 4a5c7af6817e370e774e226b910f5c45 SHA-1: 59bfb6970c34157ad47ae26c1214956107cae9b2 SHA-256: 638ab8a0084253a32a3b0594a39221460f8d45b5d3fb570d845e29cec7697c37

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed for malicious purposes. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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://pixomot.ru/uplcv?utm_term=bike+all+spare+parts+name+list+pdf PDF link annotation
- http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/ct25pjddmroc00314qhqbr7tfu/54537170657.pdfIn PDF document text
- http://kojeneckezbozi.eu/userfiles/file/10702790498.pdfIn PDF document text
- https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/8c7a5e9f73d66b59af30037d7b5d43d6/26461692357.pdfIn PDF document text
- http://udemadriatic.com/userfiles/files/bixaxajopamixajujomilon.pdfIn PDF document text
- http://yuha.be/_files/file/59322694524.pdfIn PDF document text
- http://baliretreatcenter.com/olabali_ci/media/images/newsfiles/47405844829.pdfIn PDF document text
- https://alamansyria.com/userfiles/file/bewapibukuvad.pdfIn PDF document text
- https://alakharia.com/public_html/userfiles/file/12126883518.pdfIn PDF document text
- http://studiovalentini.eu/userfiles/files/27288676780.pdfIn PDF document text
- https://equator-maritime.com/userfiles/file/dibanapewokonobol.pdfIn PDF document text
- http://pensjonatagat.pl/userfiles/file/783655201.pdfIn PDF document text
- http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160733f3c3ae55---6776824897.pdfIn PDF document text
- http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/16087d5e58c5a7---busafukumu.pdfIn PDF document text
- http://absigorta.come/file/moliribufik.pdfIn PDF document text
- http://lg-palette.com/upload/files/kiladodikotifon.pdfIn PDF document text
- https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd298014ef---wukumukaxovowemag.pdfIn PDF document text
- https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd8bc0a2a70---78807579888.pdfIn PDF document text
- http://aiswaryamatrimonials.com/fck_uploads/file/46962216936.pdfIn PDF document text
- https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/04d87eb5697788fb28a93d6428f45ece/dolabe.pdfIn PDF document text
- http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/tapusovaxato.pdfIn PDF document text
- https://prana.video/wp-content/plugins/super-forms/uploads/php/files/v2ghn56g48opdr9lepuhdls0bc/62377788020.pdfIn PDF document text
- http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ac31f4971b7---denokogememepavimowowopur.pdfIn PDF document text
- https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/ed50a0c31856a02112cd41b0de7fd51d/28064565387.pdfIn PDF document text
- http://taborcapitalpayment.com/clients/d/d0/d0a3925ee25d0adc8806453b18bccccc/File/gudurudadalasob.pdfIn PDF document text
- https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/6puf4icntvo592r5gt99gffmic/jegatupulelimagowejuz.pdfIn PDF document text
- https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608a123236d3e---sowajemepotuwel.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_off0000f41d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF41D	10684 bytes
SHA-256: `812f6ac01fb021c1965962d728f67b969f09b1645ff8d830ef68091b2d12537a`
`font_01_sfnt_off00010c9a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10C9A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000124ac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x124AC	16548 bytes
SHA-256: `5a983dab9b26bf94dcad1d2995bf8b8a1d5536102d848ecef0d031708b3a6437`

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