PDF malware analysis — malicious · d238f6219ad3a178

MALICIOUS

PDF

96.1 KB Created: 2021-09-07 10:33:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 96bb5944ac4ac41222353ff260521f0e SHA-1: 1d76877daaf1527ca76f9f79ecb8bc20f41e6a4a SHA-256: d238f6219ad3a1786f535ea6328da7644605e238bd2ee1aa0c257986a65f4902

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content likely prompts the user to install a browser extension or update, a common social engineering tactic. The numerous embedded URLs, many pointing to compromised WordPress sites, suggest an attempt to host malicious content or redirect users to phishing sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9918

Heuristics 7

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE

Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
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://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/msojce1tu7t6ca14oa4rn0irn4/namul.pdf In PDF document text
- https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/ae58e39673c55c505efba1138caf235c/9215426293.pdfIn PDF document text
- https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/edb921b3a5ad4879804810ce563489f7/15722409359.pdfIn PDF document text
- http://dsagco.com/Upload/file/59525369041.pdfIn PDF document text
- https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/e35a85cbdbc7dcf9fd64cf23ed55c4b2/rujugurexizetowukoxulipas.pdfIn PDF document text
- https://bibliotheque-des-arts.ch/ckfinder/userfiles/files/50678878863.pdfIn PDF document text
- https://samowar.me/userfiles/files/belutixiviso.pdfIn PDF document text
- http://remaining-mc.de/userfiles/file/jivezupifaxo.pdfIn PDF document text
- https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/46fa3ab264aac4d59da44f624a9722e5/difafop.pdfIn PDF document text
- https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/d9b225f8242e6228ccba2a366105faf7/67562520520.pdfIn PDF document text
- http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1ed00a40e---vitiwimede.pdfIn PDF document text
- https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/6vt6ukguv7r9auel8i1qrnm79u/79287038481.pdfIn PDF document text
- http://sakuragiramenandsushi.com/uploads/files/40400871010.pdfIn PDF document text
- https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/f527m9bj1h25lonk81s9l34nnu/dudiponovigure.pdfIn PDF document text
- http://nbnjl.com/userfiles/files/92727623003.pdfIn PDF document text
- http://casier-a-bouteilles.com/file/19990962572.pdfIn PDF document text
- http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a85cc2a8e33---18087771004.pdfIn PDF document text
- https://lolakarimova.uz/ckfinder/userfiles/files/mofakegawoz.pdfIn PDF document text
- http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613465d552923---rimigisuwodopo.pdfIn PDF document text
- http://tkhomedeco.com/assets/uploads/ckedit/files/20210715182630.pdfIn PDF document text
- http://badgerhillfarm.uk/37681832207.pdfIn PDF document text
- http://maximaviajes.com/FCKfiles/file/nulit.pdfIn PDF document text
- https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/742f8dc14ea8e9411e9a82e43422bf06/rewusov.pdfIn PDF document text
- https://panificioilcavaliere.it/userfiles/files/5916165091.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=pdf+size+compressor+to+200kbPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f24a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF24A	18900 bytes
SHA-256: `3cef7f6f166f5e81417b668e6e8c24c0fc32b0cbba3ba2bf6b6a5fac67d0f4a9`
`font_01_sfnt_off0001111e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1111E	18080 bytes
SHA-256: `e71655ae2bf9a0c3bf514a9e16e672f75913303432cd634c41d6ef53426f3185`
`font_02_sfnt_off00014072.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14072	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off00015889.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15889	11004 bytes
SHA-256: `a6c83e79ec5bf1bc207672455702fac789efc6d26fef75d1d65c8a4c7ce1a102`

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