PDF malware analysis — malicious · 33d82eb4273bcb05

MALICIOUS

PDF

84.8 KB Created: 2021-07-01 11:44:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 98bbe64d8e437d67874ff3f0eb36f2d6 SHA-1: e61e407f654ae657e7de6faf8ffa71e8a9570b73 SHA-256: 33d82eb4273bcb05a816a06777e2ea4a17817971ed292b53efeb0adcbf8a8bda

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external URIs and is identified as a link farm pointing to compromised WordPress upload storage. The ML classifier also flagged this PDF as malicious with high confidence. The primary purpose appears to be redirecting users to potentially malicious content hosted on compromised websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9956

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://irlanc.ru/uplcv?utm_term=treat+you+better+song+download+mp4 PDF link annotation
- https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/07f4261c6ac45989c1113dd3a881a9b5/tizopoxufefimoxogo.pdfIn PDF document text
- https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071670bb4924---bifavofatofoxiwajeriwi.pdfIn PDF document text
- https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/obk09a7m1qfeuddg7bpksuf2l1/30186268040.pdfIn PDF document text
- https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/c5cea4f9a1758cc6634e8dd61f356d44/72311348135.pdfIn PDF document text
- https://zzarosiscarampola.it/file/91289711147.pdfIn PDF document text
- http://praconsulgroup.ru/pict/file/vatisutavu.pdfIn PDF document text
- https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609be31b9e1a1---25066254032.pdfIn PDF document text
- https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b2ff12aec4deb77d7a9ea1cd1cdc3bc3/zedisuvavetajesufalele.pdfIn PDF document text
- https://motelandratecuci.ro/userfiles/file/gedepizubena.pdfIn PDF document text
- http://anvlaw.com/userfiles/file/54868845730.pdfIn PDF document text
- https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/vkige36kfdcc6qp0r2cnt6uudf/tekus.pdfIn PDF document text
- https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/e62c43e1bcc36776ca2ea1d2f109df78/97914266821.pdfIn PDF document text
- http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160738adf28f04---33388429434.pdfIn PDF document text
- http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f1724ad53---89021885296.pdfIn PDF document text
- http://planbmedia.hufiles/58014002410.pdfIn PDF document text
- http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7f2a6569e---jomozikabifebej.pdfIn PDF document text
- http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4827a7c77---tadipiramodirogare.pdfIn PDF document text
- http://1960ihs.com/clients/e/e0/e0b58928a48036c9af8d6cfc9cffdd99/File/gawajudesuzuwam.pdfIn PDF document text
- http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b60186ef4be---45431629297.pdfIn PDF document text
- https://thinkglobalcompliance.com/ckfinder/userfiles/files/sebifa.pdfIn PDF document text
- http://noospc.ru/SITE/files/editor/file/banura.pdfIn PDF document text
- https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/ff5b5a957089b56a3447749d0f38f0c8/67530661595.pdfIn PDF document text
- http://biosafety.biz/ckfinder/userfiles/files/rilegevizamulupegovu.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_off0000e61f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE61F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fe31.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE31	17664 bytes
SHA-256: `aacf1a04744cdac6fcc76a2c0a7a2a8f1f328e2473ada51ec222f0b41523bd34`
`font_02_sfnt_off00012c62.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12C62	11124 bytes
SHA-256: `c08cbbda1bc3c519d9bf61687495afbd41e7893766417a7ed2ad12f820104a8d`

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