PDF malware analysis — malicious · f8baa1541e0e58c4

MALICIOUS

PDF

80.9 KB Created: 2021-09-01 13:29:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 569f716bd8ea8400f69279d563041037 SHA-1: 1d081a606ca9de691b023c4e279a7c11bc320055 SHA-256: f8baa1541e0e58c43c070bff29240df7d9192420c5c8d75074e48847a8d4aea9

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external URIs and is identified as a link farm, with many links pointing to compromised WordPress sites or disposable hosting. ClamAV and ML classifiers flagged this file as malicious, indicating a phishing or trojan distribution attempt. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an effort to obscure the final destination and potentially track user interactions with the malicious links.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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://smidgel.ru/uplcv?utm_term=restricted+values+calculator PDF link annotation
- https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/37cd077e852d0a776bf77639643dd455/86256087134.pdfIn PDF document text
- http://rdmsrl.it/userfiles/files/87048699141.pdfIn PDF document text
- http://filippodelvita.com/demo/userfiles/file/guzijevedekodezonufovatim.pdfIn PDF document text
- https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c781d6e4e18---39859714477.pdfIn PDF document text
- https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/e50a9001b35efe01659f3e1c7a3d8a95/18006702659.pdfIn PDF document text
- http://teplolux72.ru/upload/file/xotakasil.pdfIn PDF document text
- https://advik.net/userfiles/file/resufarubesebaxo.pdfIn PDF document text
- http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608af8ece93ec---74328817309.pdfIn PDF document text
- http://unityproductions.com/upload/files/56995347232.pdfIn PDF document text
- http://seoulsquare.com/userfiles/file/93520994583.pdfIn PDF document text
- https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b650554cf29---38594351623.pdfIn PDF document text
- https://grupo-bahia-real-estate.com/ckfinder/userfiles/files/gilufo.pdfIn PDF document text
- https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160788b80967f8---36139777398.pdfIn PDF document text
- https://sunnyrosesschool.com/userfiles/file/47727531844.pdfIn PDF document text
- http://malbreil.com/userfiles/file/jaxume.pdfIn PDF document text
- http://michelesherrinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kulolezuvirova.pdfIn PDF document text
- http://www.gabrielamaciel.net/images/content/file/zatibexaravovozigiref.pdfIn PDF document text
- http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609dde0e54069---33759447636.pdfIn PDF document text
- https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/7qldjo6bbeobgpaiknqhc5ii9p/79522156512.pdfIn PDF document text
- http://we2meeting.com/ckfinder/userfiles/publics/files/12949297044.pdfIn PDF document text
- http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16129e33197bd4---38080050076.pdfIn PDF document text
- http://cuanhuadanang.vn/uploads/image/files/jisow.pdfIn PDF document text
- https://opuntia.eu/wp-content/plugins/super-forms/uploads/php/files/bd4cab2ec42a61fe87f10b7aa6f4a586/mifaxemujenezatuzodekodin.pdfIn PDF document text
- https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/k2kb9umghdifnrgftcrpahopbd/zanivikunokagazamaja.pdfIn PDF document text
- http://birnagarcollege.in/userfiles/file/kabuvupa.pdfIn PDF document text
- http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/nepofi.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_off0000d4ed.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD4ED	18328 bytes
SHA-256: `4c7b2a912962335a10288eed7197288c06451686446d531c7885fc65ac93735f`
`font_01_sfnt_off000104e2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x104E2	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011cf9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11CF9	10468 bytes
SHA-256: `82495e57ccad3c61f636f9c295c62156f74e50ed1942355862abd2526b9e918e`

Open this report in the interactive analyzer, or submit your own file for analysis.