PDF malware analysis — malicious · 2e07e0f0e2100753

MALICIOUS

PDF

71.3 KB Created: 2021-09-15 22:14:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: e06776e055015a5849a54cad63472193 SHA-1: e4df52ac44f97c28bd61216d485338c0cfa3102f SHA-256: 2e07e0f0e2100753f6103db4d8ea3e318f7bbd6466f4e70c58c76dc1f18d64cc

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm strategy, suggesting the document's primary purpose is to redirect users to potentially harmful external sites. No scripts were extracted, but the overall structure and URL distribution strongly suggest a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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://coretry.ru/uplcv?utm_term=bluez+ime+apk PDF link annotation
- http://geombiagioschettino.eu/userfiles/files/kutul.pdfIn PDF document text
- https://francemonde.news/UserFiles/file/titiwobobusutalukefewopek.pdfIn PDF document text
- https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a9ed509785---vovumumosoze.pdfIn PDF document text
- http://change4best.ru/upload/file/61755938144.pdfIn PDF document text
- https://castilloexterior.org/ckfinder/userfiles/files/47896397358.pdfIn PDF document text
- https://home-consult.lu/userfiles/files/61411080225.pdfIn PDF document text
- http://www.ville-dammarie.com/ckfinder/userfiles/files/60325069958.pdfIn PDF document text
- https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/eab1e2ab4fd77be2c7ebb19458ee3198/33082871764.pdfIn PDF document text
- http://cukrarnakolbaba.eu/obrazky/files/57265276611.pdfIn PDF document text
- https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16137873b3e604---51834319760.pdfIn PDF document text
- https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/48ec0boat5kk8auqn5qe2lnl5b/76535314442.pdfIn PDF document text
- https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/d5cb8a7d5a71c07dc3ac2f83d8048d82/vexifawajaben.pdfIn PDF document text
- http://merlegdoktor.hu/tmp/jevatulaweziturof.pdfIn PDF document text
- https://internationalmedia.com/userfiles/file/jujefukupur.pdfIn PDF document text
- http://myjobcareer.net/userfiles/file/2021090422310873499.pdfIn PDF document text
- https://cfbadalona.net/ckdata/files/ropekabupipabuzodefizexe.pdfIn PDF document text
- http://citra.cl/userfiles/file/didab.pdfIn PDF document text
- http://dpsnowodworze.pl/userfiles/file/70933284335.pdfIn PDF document text
- http://salon-urody-bellis.pl/images/file/tobet.pdfIn PDF document text
- https://rovetco.com/userfiles/file/jurebejanusiva.pdfIn PDF document text
- http://www.teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/pilewixugazuxif.pdfIn PDF document text
- http://vinczeandlaszlo.com/upload/27422442586.pdfIn PDF document text
- http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1613433526b124---8960171690.pdfIn PDF document text
- http://goodnest.info/tctt/sites/aaa/file/losixub.pdfIn PDF document text
- http://pedraferro.com/files/files/11046149376.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_off0000b60c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB60C	10128 bytes
SHA-256: `abcf49662fb7214bbf4417aaae0016eec7426f77f6a53a2ef033bcc76fff3363`
`font_01_sfnt_off0000ccad.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCCAD	16932 bytes
SHA-256: `093a3184391727950e2dcb96bfcab49481d7112ae1fd1c4acb66840fd489ca44`
`font_02_sfnt_off0000f778.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF778	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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