PDF malware analysis — malicious · ce6a0d638b4ceda3

MALICIOUS

PDF

102.8 KB Created: 2021-06-25 20:21:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: 63e717e20dd79ad23ad04e01e9151a07 SHA-1: e5aeb1f9d7691e876e645d15ef9dc115c533e168 SHA-256: ce6a0d638b4ceda3a1f9d979e7f9fdf08128139d9309a1dae63dffd098a67769

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or malware distribution intent. It functions as a link farm, containing numerous URLs that point to various websites, many of which appear to be compromised WordPress installations. The presence of external URIs and link farm heuristics suggests the document is designed to redirect users to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9926

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://pixomot.ru/uplcv?utm_term=a+streetcar+named+desire+tennessee+williams+summary PDF link annotation
- http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/a7un6sejtdhvtmn6444ge03f25/dadoli.pdfIn PDF document text
- https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/01000034bb0a98372417ac8759f382f6/zixofupozuxuwibelo.pdfIn PDF document text
- https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160843d2aa8b80---fonivonavojozive.pdfIn PDF document text
- http://unsersohn.ch/images/file/rifudumumaporedagojola.pdfIn PDF document text
- https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608182f6efc81---letazake.pdfIn PDF document text
- http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160acd04158e3c---36977391299.pdfIn PDF document text
- http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074917c58583---tixarijilesazomodimuf.pdfIn PDF document text
- https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/73c5f5f22d35570e34409abdf501c2c1/94757469783.pdfIn PDF document text
- http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d4bc2e4a8---lenuxizijozezuzuka.pdfIn PDF document text
- https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160745ae1176d4---xosasigilibepokatokejelen.pdfIn PDF document text
- http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c10898221---xopigisowibegelib.pdfIn PDF document text
- http://kaztelcom.kz/ckfinder/userfiles/files/doluv.pdfIn PDF document text
- https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/16083841be43ad---892194606.pdfIn PDF document text
- https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c319c5d2b6c---99385699531.pdfIn PDF document text
- https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/b6dc77913e166c6f7e0dec3ef5926119/ninexawurixinodumux.pdfIn PDF document text
- https://medtek.vn/storage/file/subefonu.pdfIn PDF document text
- http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb5a04decae---wafafotom.pdfIn PDF document text
- https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/293acdfe96489b8cf2238fa6182ff2f2/pisagidaweda.pdfIn PDF document text
- https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607863e91a67c---67931514945.pdfIn PDF document text
- https://ceccarbotosani.ro/userfiles/file/74550514990.pdfIn PDF document text
- http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0de011c8e8---getet.pdfIn PDF document text
- http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/79859328494.pdfIn PDF document text
- http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160c9e8dd70e7b---ziwowob.pdfIn PDF document text
- https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/349c79b0900aaf987409d0f42bc3641e/64364047762.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_off00013057.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13057	17348 bytes
SHA-256: `b12559a36b958aa0062bde2aa1b54fefeebc3e8a2bf7684830801804445f2857`
`font_01_sfnt_off00015cdb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15CDB	10692 bytes
SHA-256: `b8e001295083b47664619f91356c65141dc6a5714bc0dc08d3b15d7c63d6918f`
`font_02_sfnt_off00017576.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17576	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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