PDF malware analysis — malicious · 2102de3d1a7e7ef6

MALICIOUS

PDF

84.7 KB Created: 2021-09-11 09:46:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: c505c541c5a10af77b56c6caaabb03c7 SHA-1: 75b41d9ee9b1a79f226d5f55fe9146255912e38f SHA-256: 2102de3d1a7e7ef68ee3a1cd34b38f22cb2adac2bfb68a356d9bb7f73c403561

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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://uniradioweb.info/userfiles/files/2971531004.pdf In PDF document text
- https://fuoriscena.eu/file/47620081664.pdfIn PDF document text
- http://nandishoverseas.com/UserFiles/File/15721042266.pdfIn PDF document text
- http://ukwoodrecycling.com/userfiles/files/konimajarusakuzezap.pdfIn PDF document text
- http://akgwealthplanner.com/crm/files/sakuburirurawonejosoluba.pdfIn PDF document text
- https://vipbeachhouse.com/uploads/editor/file/68117019326.pdfIn PDF document text
- http://massvt.sk/editor_uploads/system/files/kunoposolipesudunemilabul.pdfIn PDF document text
- https://anmoul.com/userfiles/file/daxapupemopaxenagodezivis.pdfIn PDF document text
- https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/161304e8a43f1f---rojusajixoretavitidul.pdfIn PDF document text
- http://bronia.org/userfiles/file/tufepukem.pdfIn PDF document text
- http://rowadhr.com/app/webroot/upload/files/nexefusukodalesiba.pdfIn PDF document text
- http://saluteebenesseresas.it/userfiles/files/powujosuxuni.pdfIn PDF document text
- http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/b0d68b45dc00a3b12015af66fc32edcb/3214078932.pdfIn PDF document text
- http://vnos.vn/app/webroot/uploads/files/geluwawemozorededulu.pdfIn PDF document text
- http://hwayoung.kr/upfile/files/74288569271.pdfIn PDF document text
- https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/161351200d5497---49954389824.pdfIn PDF document text
- https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/161347f4e501ce---76487385154.pdfIn PDF document text
- https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae50fb36d7---bavililenuku.pdfIn PDF document text
- http://tythb.cn/uploadfile/files/87332843130.pdfIn PDF document text
- http://zoo-foto.cz/userfiles/file/rimufoxetadipigozi.pdfIn PDF document text
- https://bnbcostaverde.it/userfiles/file/39970710544.pdfIn PDF document text
- http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613529969362c---10733508890.pdfIn PDF document text
- http://hnfhdc.com/UpLoadFile/2021090617010710288.pdfIn PDF document text
- http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161373916408b6---buxejinepu.pdfIn PDF document text
- https://syteq-pro.com/userfiles/file/3442705777.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=contacts+on+iphone+not+syncing+with+outlookPDF 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_off0000e564.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE564	17904 bytes
SHA-256: `e8b42bd8621cca9224cad115bdf140965809e8a9c617eb907d12b307b3a5a2f9`
`font_01_sfnt_off00011346.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11346	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012b5d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12B5D	10976 bytes
SHA-256: `922c4e3f1440cd86c3abe1215312f22a5def58fcda24ecb9d178b636a7477fe3`

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