PDF malware analysis — malicious · f7bd15d8a5598515

MALICIOUS

PDF

83.7 KB Created: 2021-09-01 06:05:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 9ac527a806863d0009ac711890216bdf SHA-1: c41489b1d47ac44770ceea1c66f97cb21b751565 SHA-256: f7bd15d8a5598515df0661a97a70afdd7b22ef8a160e5793af866493a62f4c12

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating it likely exploits a vulnerability or contains malicious content. The presence of numerous links pointing to compromised CMS uploads and disposable hosting suggests a phishing or malware distribution scheme. The file's structure and embedded links are indicative of a tactic to redirect users to potentially harmful external sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9983

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://solemarservizi.it/userfiles/files/93700003855.pdf In PDF document text
- http://www.protectakoteasia.com/ckfinder/userfiles/files/3246934066.pdfIn PDF document text
- http://nuraski.pl/wsg/userfiles/vilobi.pdfIn PDF document text
- https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/11047f1dda4760010b3b9778d87a7826/87310743174.pdfIn PDF document text
- https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/fffbae7007d3380b4f819370f3998b0a/21712217061.pdfIn PDF document text
- http://vngo-cc.vn/cooker/public/files/povutezavapol.pdfIn PDF document text
- http://robbes.nl/media/files/8071221281.pdfIn PDF document text
- https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16094aa66b224e---18394353323.pdfIn PDF document text
- http://aeronautike.com/userfiles/file/68752106112.pdfIn PDF document text
- http://cokhixnktientien.com/Images_upload/files/4470600135.pdfIn PDF document text
- https://pavillonwohlen.ch/userfiles/files/xikugetexemajoto.pdfIn PDF document text
- http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdab9b185ab---lemekopave.pdfIn PDF document text
- https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/713be73077c84aaa7ffc6e1ae2a2189e/17914200317.pdfIn PDF document text
- http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/a115fca396c6fd3c79eb99372ff946ad/12322584442.pdfIn PDF document text
- http://www.lugashotel.com/data/editorfile/vemopujonan.pdfIn PDF document text
- http://skikk.eu/app/webroot/files/userfiles/files/80483759819.pdfIn PDF document text
- http://escuelasfutbol8.com/docs/files/setutisonoladupo.pdfIn PDF document text
- http://yuha.be/_files/file/jurawuwaduwidip.pdfIn PDF document text
- https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085aea72b282---46016528064.pdfIn PDF document text
- https://gute-reise.ru/i/files/files/redowupitakemoguk.pdfIn PDF document text
- http://valifyrepapillon.com/clients/6/68/68e1c6a84db99a04c21676ff826d6e37/File/wekudar.pdfIn PDF document text
- https://cafemocion.com/userfiles/file/jidineze.pdfIn PDF document text
- http://www.yoko-ono.be/images/userfiles/file/52652050647.pdfIn PDF document text
- https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/309cb7cc5a06669eb2a702da2a175eaf/71974429455.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=basic+properties+of+multiplicationPDF 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_off0000e0de.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE0DE	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f8f0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF8F0	17856 bytes
SHA-256: `aeb88e1cb4dc1c9e7e84fb20af39b7b73c27dac03036cd8b79364ab9b62318ab`
`font_02_sfnt_off0001271b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1271B	10792 bytes
SHA-256: `d08e4fcb1b6c580dbc538a3c6587fa12a3379d9e9616934cf7070118ca2ab2c4`

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