PDF malware analysis — malicious · 249e61d0aeb54b60

MALICIOUS

PDF

79.8 KB Created: 2021-09-02 22:17:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 763c38c1e0195ebb69eaee134ebf0d88 SHA-1: f1ad6b78c4a022e84fce967f27f4888273eaa9ae SHA-256: 249e61d0aeb54b60f2b812ae69542dce416d3d138e247aa94bbb68ad8f71219d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics and an ML classifier as malicious, specifically as a phishing attempt. It contains a link farm pointing to compromised WordPress upload storage, likely intended to host further malicious content or redirect users to phishing sites. The presence of embedded URLs and the nature of the heuristics strongly suggest a phishing attack vector, likely delivered as a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

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://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/16081235e5aafe---sekopejulitujabiga.pdf In PDF document text
- http://ecohouse-lab.com/userfiles/file/xikariwadepixonogoluduz.pdfIn PDF document text
- https://x-software.cz/data/file/52608488322.pdfIn PDF document text
- http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16103c9706d965---watenoned.pdfIn PDF document text
- https://gymlesgeants.com/upload/editor/file/82179451240.pdfIn PDF document text
- http://ecoevopublisher.com/files/upfiles/file/jibijolodizujavakefol.pdfIn PDF document text
- http://www.mariabeckmann.com/fotos/uploads/files/tewosatule.pdfIn PDF document text
- https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/1e66f6119ce78bf6c8cf10da27b9cad8/zidunabaketen.pdfIn PDF document text
- https://stallion-international.com/userfiles/file/7727417983.pdfIn PDF document text
- http://tutek.eu/userfiles/file/381069997.pdfIn PDF document text
- http://timecraftz.com/userfiles/file/66752731393.pdfIn PDF document text
- http://bsl-trans.ru/admin/ckfinder/userfiles/files/47139599536.pdfIn PDF document text
- https://chupwo.com/editor_upload/file/5668261974.pdfIn PDF document text
- https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/4896fc73781817a1b8700468ca69b84d/wixizepok.pdfIn PDF document text
- http://ampletrekking.com/userfiles/file/40242985208.pdfIn PDF document text
- http://batiment-tunisie.com/userfiles/file/saturoferilekesosak.pdfIn PDF document text
- https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984c7f12e64---72811502924.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=torque+pro+%28obd2+%26+car%29+manualPDF 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_off0000d67d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD67D	17196 bytes
SHA-256: `924afa0d43ae4975bca675f2190d78b1a9eca3e8dc6d7be8ecccc5c59762cc8e`
`font_01_sfnt_off00010358.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10358	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011b6f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11B6F	10264 bytes
SHA-256: `1512219739d6bbc028aec90bb3748c2fef0a356b80b517f1194f36768768cd09`

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