PDF malware analysis — malicious · 20bca7548adac939

MALICIOUS

PDF

93.3 KB Created: 2021-06-29 10:41:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05

MD5: 2e144ed9b02e8a494fcab17751c314f2 SHA-1: 25db361f7752e7fcd831a7f177b87852313ec309 SHA-256: 20bca7548adac939cecbb144caa1fe8ce552c32ec56125481abfb309e20a8c1e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external URIs and points to compromised CMS upload storage, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of multiple links on disposable hosting further supports this assessment.

Machine Learning

Nyx PDF Classifier malicious score 0.9786

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://drafthe.ru/uplcv?utm_term=multiple+choice+solver PDF link annotation
- http://progetec.org/userfiles/files/nupofazuremos.pdfIn PDF document text
- https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/2korlc24ef17r3rpvqvao906vh/fezix.pdfIn PDF document text
- http://datong-travel.tw/upload/ckeditor/files/20210626074729.pdfIn PDF document text
- https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7090809247---13932598848.pdfIn PDF document text
- http://bulgankhangai.mn/userfiles/files/7226657484.pdfIn PDF document text
- https://electrabicycles.pl/app/webroot/uploads/file/16226852775254.pdfIn PDF document text
- https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e73fd3cd5---95578600277.pdfIn PDF document text
- http://krakow4you.pl/krakow/files/49011895022.pdfIn PDF document text
- http://msinziniering.com/userfiles/file/rekegotokifen.pdfIn PDF document text
- http://drapikowski.pl/uploaded/fck_files/file/xexetiwu.pdfIn PDF document text
- http://asvpp.fr/pdf/43282888886.pdfIn PDF document text
- https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607880ffea9e7---55145850820.pdfIn PDF document text
- https://baongochoa.com/upload/file/baseparitim.pdfIn PDF document text
- https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/dbf32862e2a71c65928301daac343d77/sebupuv.pdfIn PDF document text
- https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/ngs358ti71v9gmfscqsf31fudh/puxavajurinozuseliwa.pdfIn PDF document text
- https://vildmarksjagt.dk/userfiles/file/viwadubi.pdfIn PDF document text
- https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5cfd7e3594---28996037434.pdfIn PDF document text
- https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa45b00664---sebelekozarav.pdfIn PDF document text
- http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5dbc75ecd---tovomomovadezajig.pdfIn PDF document text
- https://cr2tek.com/userfiles/Proj_Name//files/xomasos.pdfIn PDF document text
- http://jagatjyotischool.org/jagatjyotischool/userfiles/file/sofodireboxasak.pdfIn PDF document text
- http://kibbkw.com/uploads/files/56636124774.pdfIn PDF document text
- https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/441dd05adfd23123f9a84893787a60b2/wegabas.pdfIn PDF document text
- https://c-effeimmobiliare.it/file/pakaki.pdfIn PDF document text
- http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c889695dc18---9932206602.pdfIn PDF document text
- http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8260e18ccc---37474691684.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f10f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF10F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010920.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10920	16312 bytes
SHA-256: `7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae`
`font_02_sfnt_off00011f27.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11F27	18208 bytes
SHA-256: `9163692020a4bfb63e930d74c0a0610afdc8421efe57b3de9e2e7463800f8f80`
`font_03_sfnt_off00014fb6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14FB6	10364 bytes
SHA-256: `10ef3a73e8f56f62978672d885cd29f8930b72c006d807e54e8c0f0d3cf8d854`

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