PDF malware analysis — malicious · 7fe9300a1407be75

MALICIOUS

PDF

72.6 KB Created: 2021-09-07 11:02:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: 373de351975b234eb67b0ae47d82899f SHA-1: 16a148c055f55b70b80b20eb5b25ccb1e08a9c4d SHA-256: 7fe9300a1407be75cc58f0a39ab13ab4f9b820bb5d8cf639dbd18f9f36bbbddf

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which lead to disposable hosting or compromised CMS upload directories. The ML classifier strongly indicated maliciousness, suggesting the links are intended to redirect users to malicious content or phishing sites. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

Nyx PDF Classifier malicious score 0.9840

Heuristics 5

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://ekaplast.site/admin/ckfinder/userfiles/files/12592129907.pdf In PDF document text
- http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c0af10421---26606550225.pdfIn PDF document text
- https://medicentrumnz.eu/medicentrum/files/file/48957894069.pdfIn PDF document text
- http://canxetaianhduc.com/images/file/19703795002.pdfIn PDF document text
- https://5uempat.com/contents//files/rawudejokutakikodeje.pdfIn PDF document text
- http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081b20d660b9---xabijub.pdfIn PDF document text
- http://unioncentralreunion.com/clients/3/3a/3acd25563584ef55397927d4124196c4/File/kevoviruviwodujabowas.pdfIn PDF document text
- http://vietsonplastic.com/uploads/userfiles/file/22527158833.pdfIn PDF document text
- http://rld-carbon.ru/file/kotebadizazefomunuwomezop.pdfIn PDF document text
- http://canadapremiumlubes.com/survey/userfiles/files/16603225945.pdfIn PDF document text
- https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/c864d4e0fb72a5f674d459d59d211fa7/35641859938.pdfIn PDF document text
- http://pcmcpropertyblog.com/wp-content/plugins/super-forms/uploads/php/files/9d72f1f37db9a65076879ee7b5d1764e/78726687971.pdfIn PDF document text
- http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4765adf31a---27702788492.pdfIn PDF document text
- https://mn-lawfirm.com/box/userfiles/file/fukov.pdfIn PDF document text
- http://fuerst-architects.com/uploads/file/48027099338.pdfIn PDF document text
- http://nbnjl.com/userfiles/files/11864599725.pdfIn PDF document text
- https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4339628830---54475715261.pdfIn PDF document text
- http://pm-ural.com/uploads/files/tewusile.pdfIn PDF document text
- http://seoulsquare.com/userfiles/file/91767539586.pdfIn PDF document text
- http://bandenplaats.nl/cmsimages/file/bipujifokejaripifow.pdfIn PDF document text
- http://schroniskoorzechowce.pl/ckfinder/userfiles/files/wonuxisupaxipekufugum.pdfIn PDF document text
- https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076e10db3f47---26085223889.pdfIn PDF document text
- https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/b63d832747005fc9e8f479817a57f60c/94811787246.pdfIn PDF document text
- http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16082440f6b28e---97111422058.pdfIn PDF document text
- https://fier-forjat-valimet.ro/ckfinder/userfiles/files/duzutewudawimekaz.pdfIn PDF document text
- http://gidaero.com/upload/fckeditor/file/guzunagipegexesebuketuxen.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=anansi+the+spider+story+worksheetPDF 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_off0000ba56.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBA56	16492 bytes
SHA-256: `d71fc7fbf4b21a7118873c7d94e0739ae1bec2eeebbbb1e1da04ee0e1e0e4df9`
`font_01_sfnt_off0000e42b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE42B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000fc42.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC42	10716 bytes
SHA-256: `92b16d6a9b952331dd2826a08729bdac8063f0080d376f1783537f416c5837e0`

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