PDF malware analysis — malicious · d0b27c11c0d0a6f2

MALICIOUS

PDF

79.3 KB Created: 2021-09-19 09:38:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: b7cded6bed414123fcf915eede2975c6 SHA-1: f9b6735ef7bba0b7d9387161c060491c31ded38b SHA-256: d0b27c11c0d0a6f27468d006a035ef1345a252dd7352b374100cfba71acfb96c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains numerous links, many pointing to compromised WordPress sites and other domains hosting PDF files, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious distribution mechanism.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://ks4073.com/file_media/file_image/file/mizalitusujebafedijaruso.pdf In PDF document text
- https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/52625b4884c6eb51e746cd95da4f9abf/2750216843.pdfIn PDF document text
- https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/d89d0160acfa82aefb31ae6f0798cd50/lomijod.pdfIn PDF document text
- http://locnuocvietmy.com/Images_upload/files/siximexepupufakazovema.pdfIn PDF document text
- http://ordinate-ltd.com/file_media/file_image/file/33304494845.pdfIn PDF document text
- https://laughteronlineuniversity.com/images/upload/files/33967920954.pdfIn PDF document text
- http://skyrybupaslaugos.lt/uploads/files/6275552939.pdfIn PDF document text
- http://bandenplaats.nl/cmsimages/file/11468288271.pdfIn PDF document text
- https://ldcpc.com/ckfinder/userfiles/files/9312499600.pdfIn PDF document text
- http://ottomaniantextile.com/userfiles/file/17378695741.pdfIn PDF document text
- http://www.sana-anong.com/ckeditor/ckfinder/userfiles2/files/ginapigevomi.pdfIn PDF document text
- http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161381a02503d2---wofeguwetutuwikemi.pdfIn PDF document text
- http://box8websites.com/ckfinder/userfiles/files/55217367547.pdfIn PDF document text
- http://nm-union.ru/ckfinder/userfiles/files/sogeripexofubire.pdfIn PDF document text
- https://hyosung-gulf.com/uploads/file/20107251986.pdfIn PDF document text
- https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/8os5epuhudedk9f96le09agcpd/92450768773.pdfIn PDF document text
- https://www.weldcor.ca/public/ckfinder/userfiles/files/27035254292.pdfIn PDF document text
- http://stolizstekla.ru/userfiles/file/tovamujivodamorigejavu.pdfIn PDF document text
- https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/8b34f36060e3f3605e57e8919cced8fb/46864670849.pdfIn PDF document text
- https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/fde4e4f9c87d9417cae71cb476d0ebf1/mazawarudadazotiw.pdfIn PDF document text
- http://dvif.fr/userfiles/file/10829155763.pdfIn PDF document text
- http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16142bbe279c9b---sedefumomojuxuxef.pdfIn PDF document text
- http://medicalproduct.hu/images/files/42475269221.pdfIn PDF document text
- http://infoegrafica.com/userfiles/files/nasif.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=fake+fortnite+appPDF 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_off0000d1dd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD1DD	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e9ef.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE9EF	18176 bytes
SHA-256: `68fc9e9d65424c2ed86e4f1673e50f84cbcfbaef1b67f383b8789e66d11f5abd`
`font_02_sfnt_off0001189b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1189B	10204 bytes
SHA-256: `854f516ea28a3ee974b5fdc92a32e48cdb9d11401a38b0b2b122c355281d0636`

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