PDF malware analysis — malicious · 7faa3cb4beb0963a

MALICIOUS

PDF

68.5 KB Created: 2021-09-25 22:21:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31

MD5: 4f0db9f6a8c8cccc1ab20408961d8fdc SHA-1: 3ea848493511e24df756021ce7814151acbd796a SHA-256: 7faa3cb4beb0963a8eca7d915932f27e0343ae418255291e9cc0e7c7cbfd538e

104 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many hosted on compromised or disposable domains. These links likely serve as a lure or redirect mechanism to deliver further malicious content or phishing pages. The ML classifier strongly indicates malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

Heuristics 6

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://krisoc.ru/uplcv?utm_term=lock+screen+my+phone PDF link annotation
- http://dreesmann-foto.de/userfiles/file/43915619126.pdfIn PDF document text
- http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161394747cf89c---jikikito.pdfIn PDF document text
- http://angerdress.store/ckfinder/userfiles/files/karuloxasesal.pdfIn PDF document text
- https://europacreativaeuskadi.eu/files/galeria/files/febedojetojuvukesugu.pdfIn PDF document text
- http://atthaya.com/file_media/file_image/file/fitevifufaxibaxuvu.pdfIn PDF document text
- http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148475dc9d8d---forotagemifufepukadosuj.pdfIn PDF document text
- http://studiogeologicotrilobite.com/userfiles/files/2322076113.pdfIn PDF document text
- http://lagerunda.it/public/upload/file/nusupaxifimafudutepidu.pdfIn PDF document text
- http://www.injamal.es/nueva/ckfinder/userfiles/files/9491133785.pdfIn PDF document text
- http://riggi.ru/userfiles/file/nakosokapumemajefipasa.pdfIn PDF document text
- https://karpataljaturizmus.hu/upload/72398758047.pdfIn PDF document text
- https://kurtoglumob.com/upload/file/47301312514.pdfIn PDF document text
- https://hurghadalife.net/userfiles/files/pomav.pdfIn PDF document text
- https://manage4.realtourvision.com/rtv/ckfinder/userfiles/images/files/kajerexezax.pdfIn PDF document text
- http://lovelyspa.net/ckfinder/userfiles/files/5563938539.pdfIn PDF document text
- https://pasifikendustriyel.com/userfiles/file/bevonopimutegelafi.pdfIn PDF document text
- https://trystsalonri.com/images/file/gidajotuwojonesafunular.pdfIn PDF document text
- https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ef547b7488---kuzad.pdfIn PDF document text
- http://www.ccengis.be/applications/ckeditor/addons/ckeditor/ckfinder/userfiles/files/50191394926.pdfIn PDF document text
- http://studiogiamberardino.it/userfiles/files/miwibaberejopusewiteri.pdfIn PDF document text
- http://associazionemillesogni.it/userfiles/files/44393541701.pdfIn PDF document text
- http://gaishachuukobuhin.com/js/upload/files/ligito.pdfIn PDF document text
- http://capitolmetrophysicaltherapy.com/userfiles/file/wusenomigofamofudiwo.pdfIn PDF document text
- https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16130315504433---nadabas.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_off0000b0c9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB0C9	14652 bytes
SHA-256: `d161dd9ab0edef63cc8b47457afa36f8a670d03867a85f345f3961a9f91cb3ae`
`font_01_sfnt_off0000d565.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD565	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000ed7c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED7C	10404 bytes
SHA-256: `b25c6af0fb04c5c431e003543dff299178df76cf3f71706b69b41b7609c43a83`

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