PDF malware analysis — malicious · 0ebe42deb56b69f1

MALICIOUS

PDF

78.3 KB Created: 2021-06-29 12:44:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: 89a77c72a7aad042e70af31a12b2e7b8 SHA-1: 8f1899d414ed8aa648f82aee99605f2e41397120 SHA-256: 0ebe42deb56b69f14dc41b93ce98be4c9063e0a576fb61eb21fa6c2dbaec3918

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm pointing to compromised WordPress sites and disposable hosting. The embedded URLs, such as 'https://infrive.ru/uplcv?utm_term=flaubert+dictionary+of+received+ideas+pdf', suggest a phishing or malware distribution lure, likely disguised as a search result. No scripts were extracted, but the PDF structure itself facilitates redirection to these malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9962

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://infrive.ru/uplcv?utm_term=flaubert+dictionary+of+received+ideas+pdf PDF link annotation
- http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607361b4adf7b---wemebanek.pdfIn PDF document text
- https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/c848818ad75d5154d121149b988a4a9e/82903233727.pdfIn PDF document text
- https://tenekedjieva.com/uploads/file/lodonanufarabuzapizub.pdfIn PDF document text
- https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/sj91uavop48t44vdj812pb3t0l/difakawakejejaneliz.pdfIn PDF document text
- http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aba0234f52---suvudinafizipamovufosow.pdfIn PDF document text
- http://annandale1963.com/clients/69704/File/vudepowabanure.pdfIn PDF document text
- http://somersetcountybar.org/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/metijopaxugozeka.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a24a5336bb4---fuduzalukadobi.pdfIn PDF document text
- http://bhsclassof70.com/clients/a/ac/acf0241a72c9eb28a719a759cf8a4748/File/2623847635.pdfIn PDF document text
- https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/859fa4296be7b7bf2f9c5de5997d441a/garazisozi.pdfIn PDF document text
- https://abofahed.com/userfiles/file/75556283396.pdfIn PDF document text
- http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/up1ngqtgd7rjvg9q3i9ebgksh7/gexukukapazaxozag.pdfIn PDF document text
- http://greenplanetnepal.com/userfiles/file/40395064503.pdfIn PDF document text
- https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/274c7ffb4081da52710fba806c51cc86/ritadavitimifesefegegela.pdfIn PDF document text
- http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/5ov18d763s86k4a8l8o7tvmkiu/radikonafumadofowapid.pdfIn PDF document text
- http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160721ca62d5aa---bapomagajemawifikilebupoz.pdfIn PDF document text
- https://idd.no/ckfinder/userfiles/files/diwosorigusasebobaw.pdfIn PDF document text
- http://www.dilipprabhavalkar.com/images/file/dokakowilikilixusewake.pdfIn PDF document text
- https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/22nk7rjs6ajr49u658jprkrp6t/30042256851.pdfIn PDF document text
- https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/d7ca6748e6cc82eea0720ea8b6d181b1/49321501438.pdfIn PDF document text
- https://alshaabcoop.com/userfiles/file/nosibajexazeb.pdfIn PDF document text
- https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/ee2c1d698797a5a5a287ee60a17d7d09/59394529672.pdfIn PDF document text
- https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5a7d7f3db---2133342930.pdfIn PDF document text
- http://washchienluoc.com/upload/file/sedituvazesowigomas.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_off0000cef0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCEF0	11012 bytes
SHA-256: `8f1a0201b4d643423ad92d478f3248673f2a6c8b5837b8d80ff6c1a9f5ec24ec`
`font_01_sfnt_off0000e87d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE87D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001008f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1008F	16540 bytes
SHA-256: `6aeaee1c6d8060f38aefd0b74fc91cd2c69720000bfe25b7762e44e3a0ea3fc2`

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