PDF malware analysis — malicious · 742e686ee788d436

MALICIOUS

PDF

87.8 KB Created: 2021-09-06 21:30:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20

MD5: 0357130199b38b4818d19a5fba8734cd SHA-1: 2a2ba90fecc28e3e6a65e20dd6d4bc1c37ca70cf SHA-256: 742e686ee788d436d67f965785e4c50e493e39f3cf5520a71952bb8a7c96555e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of multiple external URIs and a link farm heuristic indicates a clear intent to redirect the user to external, potentially harmful, resources.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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 https://chcial.ru/uplcv?utm_term=common+spanish+verbs+conjugation+pdf PDF link annotation
- http://ptaki.info/imgekoprojekty/files/54338036337.pdfIn PDF document text
- http://cdhsalumni.com/clients/28864/File/88994500176.pdfIn PDF document text
- http://sakurahoaanhdao.com/webroot/img/files/21877958351.pdfIn PDF document text
- https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/5gqv8aeak1g9kka7tehci67aq6/75213132787.pdfIn PDF document text
- https://bishopsalamatkhokhar.org/userfiles/file/tipipexusurek.pdfIn PDF document text
- https://espiber.cl/images/uploadedimages/file/56548177138.pdfIn PDF document text
- https://abogadosaccidentealicante.centralcms.cloud/galeria/files/52629509216.pdfIn PDF document text
- http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16110b2b50f1e2---jadokamelasubuzukabaju.pdfIn PDF document text
- http://vigen12.com/userfiles/file/bekiwizepawowos.pdfIn PDF document text
- https://pjkconstruction.ca/images/file/buduwolajo.pdfIn PDF document text
- https://talaa-obour.com/webmisr/uploadwebmisr/file/23715027867.pdfIn PDF document text
- http://rqconsultores.com/userfiles/file/porubuxodubugiji.pdfIn PDF document text
- http://rld-carbon.ru/file/resikelinoxawiromawedowij.pdfIn PDF document text
- https://pypconsultores.mx/userfiles/file/20755864940.pdfIn PDF document text
- https://menuiserie-sainte-anne.fr/userfiles/file/relup.pdfIn PDF document text
- https://associazionedynamica.it/uploads/file/24578549330.pdfIn PDF document text
- https://milsagliksen.org/upload/ckfinder/files/83595197600.pdfIn PDF document text
- https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/4102aa47f8151364089e9924a73d270e/40335449320.pdfIn PDF document text
- https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606d68d066055---506341937.pdfIn PDF document text
- http://harasim.cz/uploaded/files/56554480587.pdfIn PDF document text
- http://hillsdale66ersreunion.com/clients/c/c6/c679c52642bc64dd8629b98fb95ccc77/File/95897176280.pdfIn PDF document text
- http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d2c6d36d1---pabovowekevegan.pdfIn PDF document text
- https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/f661bb4acf926b607b98e673ab0d65be/tokudurasunezigipiwat.pdfIn PDF document text
- http://vimar.ua/userfiles/files/wabuxewotur.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_off0000ec45.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC45	19424 bytes
SHA-256: `a9ca0e332eb93b9500d467bc5aac138846e3ebb688887202237f088a7d5813ec`
`font_01_sfnt_off00011ebd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11EBD	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000136d4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x136D4	11488 bytes
SHA-256: `509af6027ba83e8ccbd701ecb27d4187df24a187b1af69e85471727a7fbaacce`

Open this report in the interactive analyzer, or submit your own file for analysis.