PDF malware analysis — malicious · 6fba57c2d743e7e1

MALICIOUS

PDF

86.5 KB Created: 2021-06-28 23:22:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 83cfbbda3725da906ed70b7240bf0179 SHA-1: 4734614fb6f996801050d56d7b7d7049aa1794cc SHA-256: 6fba57c2d743e7e18c0f204634363c164f6834226500380dc3c4432da34a409b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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://atdawnwelift.com/userfiles/file/vegaxujezolemidewatolage.pdf In PDF document text
- https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/bput0f62ok4ebolv5eetjnaoqr/fibulozusojud.pdfIn PDF document text
- http://labotinnghia.com/img/files/29518685418.pdfIn PDF document text
- https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/27f3aa2567454abece46448b28599f7c/fudupunutobovejematuw.pdfIn PDF document text
- http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/16076db40b8129---19748715015.pdfIn PDF document text
- https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b661cade39---5034378439.pdfIn PDF document text
- http://bukharageorgia.com/sites/default/files/file/1078289485.pdfIn PDF document text
- http://wadirumshootingstars.com/userfiles/file///17335509230.pdfIn PDF document text
- https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/20022bb3ea89dd4812d8e050437d66ba/bijozogova.pdfIn PDF document text
- http://produccionesproezas.com/clients/2/28/28ea8f13eb032e89cab2838ec144e7af/File/joxosajixazowot.pdfIn PDF document text
- https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8535cf0820---gutugazidogiwuroture.pdfIn PDF document text
- https://argentinaproduct.com/ckfinder/userfiles/files/90246327832.pdfIn PDF document text
- http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/40aad8922dccf2bd94c13df995f8650c/vonasim.pdfIn PDF document text
- http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160828ab002ae5---92507752155.pdfIn PDF document text
- http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d36999b9ff2---ritidisil.pdfIn PDF document text
- http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608301d1b06d0---dubepababebanawa.pdfIn PDF document text
- https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/e4f605aee38b0bd0e9328177cc20c7c7/xadeduzofewom.pdfIn PDF document text
- http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16072b84aa271f---zolixidematila.pdfIn PDF document text
- https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/7a0d0afda31f8ea2248f2afacb8dc7d0/8980421091.pdfIn PDF document text
- https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/4a4ac7a3492a04fb38729a4289d7ea1c/kakunit.pdfIn PDF document text
- http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160835a8ab5675---fatokudogaxulen.pdfIn PDF document text
- http://occahomesearch.com/userfiles/files/rujalajesa.pdfIn PDF document text
- https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/u5cnvpntmmmbgrnn459j5qm5lr/vajikapufuvog.pdfIn PDF document text
- https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d30f3aef11b---51243901265.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=abscess+removal+surgeryPDF 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_off0000f034.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF034	16992 bytes
SHA-256: `711308304c6ba9f14035919cf7595ddffaae98915bbf67a620597f97c5413362`
`font_01_sfnt_off00011c6e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11C6E	10680 bytes
SHA-256: `1e2034d6c58614c8e1aa87f6d012cdbcd01dc4ad6c87c23f71eb8568b4cf8fb9`
`font_02_sfnt_off00013513.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13513	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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