PDF malware analysis — malicious · ccf50ea18cda3c62

MALICIOUS

PDF

85.4 KB Created: 2021-06-30 08:32:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: b9496161e526eb152871ff0d85bf9314 SHA-1: 6d16bd66267d5dea1f189e0e429507bb89d4af0a SHA-256: ccf50ea18cda3c62b55197f0cdd92553a89e994abaf7d6957c086f4f0d510c72

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 serves as a phishing or malware distribution lure. The numerous external URLs embedded within the document, many pointing to compromised CMS uploads or disposable hosting, suggest it functions as a link farm to redirect users to malicious sites. No scripts were extracted from this sample, but the overall structure and URL patterns are consistent with a phishing or downloader campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9860

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://synerhu.ru/uplcv?utm_term=spider+webs+flammable PDF link annotation
- http://fmi.lu/userfiles/files/bizumorofela.pdfIn PDF document text
- https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/pr5d97ejospuf7umuta6fgd3bj/gedapalowamojabonax.pdfIn PDF document text
- https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/e68cfc7cf076d98a8ee1cca99696ad9c/22708518311.pdfIn PDF document text
- http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0dbff0a718---sabibufaxawigata.pdfIn PDF document text
- http://shinies.ru/img/lib/file/digedosubomasorobaje.pdfIn PDF document text
- https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/37527fc58c2f940175d4f9390a33307b/setazejixonisukulup.pdfIn PDF document text
- http://coeb.eu/userfiles/files/75174614582.pdfIn PDF document text
- http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/61ug9fl1bqbpspa100pp8fc8n4/82168982267.pdfIn PDF document text
- https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/j2btajj9n3d44qmbfr4l2hd17l/joxuvatixazefetupero.pdfIn PDF document text
- http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/09d9521768b28654e66cb609ebab9181/73187988443.pdfIn PDF document text
- https://hogozaty.com/ckfinder/userfiles/files/87269510244.pdfIn PDF document text
- https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1607e56d7718f7---boxobinifisunebegoboze.pdfIn PDF document text
- https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16079bbf2c7257---vuladomakidoxedamagav.pdfIn PDF document text
- http://www.odnpoznan.pl/fotki/file/file/xifaboritog.pdfIn PDF document text
- http://latexindia.com/userfiles/file/3856279361.pdfIn PDF document text
- https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/14aebc2b836d0103e0ebac2bd7dbc991/48666384480.pdfIn PDF document text
- http://soflocops.net/clients/81266/File/20720950452.pdfIn PDF document text
- https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/bcba06825f419a3a35e266f47f066cb5/naluli.pdfIn PDF document text
- http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e60c56834---58636602594.pdfIn PDF document text
- https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b891c3ccd29---rolubidesulonotil.pdfIn PDF document text
- https://susta.vn/userfiles/file/50208893226.pdfIn PDF document text
- https://ksuskalology.com/images/file/82586600482.pdfIn PDF document text
- https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a53c16083e4---97456134683.pdfIn PDF document text
- https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ba95bd66280---nufasesevelogeza.pdfIn PDF document text
- https://pristineleather.com/userfiles/file/76259657302.pdfIn PDF document text
- http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fac5e7dbdd---sesalugugapagiporevojewi.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_off0000ec47.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC47	16912 bytes
SHA-256: `2d41a05981875410501f2fe9b378982d33f72d24afa14bd7124f4a5b835fea12`
`font_01_sfnt_off0001185a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1185A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013071.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13071	10636 bytes
SHA-256: `c33a3ea2a1bb530904ee1bc93b46eb4a710774f88b589bb64785782f4f68543b`

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