PDF malware analysis — malicious · 6fe7ea567c6e0f1b

MALICIOUS

PDF

81.1 KB Created: 2021-09-08 06:05:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: d66fdb3d019f7a68e697d533b5d02959 SHA-1: c76bc92864202a90d63e7eaee1cc39882c555fb8 SHA-256: 6fe7ea567c6e0f1bea39cd3bc536917c1854e2ee00aa3ca6e68ed8d0fbc40064

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure itself is used to facilitate the attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

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://queure.ru/uplcv?utm_term=bright+morning+stars+are+rising+pdf PDF link annotation
- http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160975a8d19252---92829462035.pdfIn PDF document text
- http://nct-vn.com/userfiles/file/5800810388.pdfIn PDF document text
- http://the100voicesofgospel.de/fichiers/newsletter/file/zaxudig.pdfIn PDF document text
- http://vasvaripalmuzeum.hu/upload/file/18510543008.pdfIn PDF document text
- http://bdsductri.com/upload/files/48290721701.pdfIn PDF document text
- http://fiumevivo.it/userfiles/files/7536307247.pdfIn PDF document text
- https://cristalensi.com/public/File/4225082510.pdfIn PDF document text
- http://studiotrusso.it/userfiles/files/52488276109.pdfIn PDF document text
- https://jagamimpi.net/contents/files/nidinoxubal.pdfIn PDF document text
- https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/26f82fdff956b32823ad958cd8cafaec/dakurenorubegi.pdfIn PDF document text
- https://sunridgecorp.com/uploads//files/202108031619474127.pdfIn PDF document text
- https://galerieportelouise.be/userfiles/files/73414758102.pdfIn PDF document text
- http://mgocsm.in/userfiles/file/67685947397.pdfIn PDF document text
- https://efnnma.org/files/file/90847249102.pdfIn PDF document text
- http://police8coop.com/UserFiles/file/vetexag.pdfIn PDF document text
- http://atthaya.com/file_media/file_image/file/gijezubuwovugasapogas.pdfIn PDF document text
- http://circuitoinsulargc.com/documentos/file/majovepidodaza.pdfIn PDF document text
- http://www.annaleehuber.com/content_files/file/xuninavolidugo.pdfIn PDF document text
- https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160832015b94f4---pusakipivojowokivog.pdfIn PDF document text
- https://tramhuonghanoi.vn/upload/files/36827817734.pdfIn PDF document text
- http://frangarcia.eu/upload/file/74429240905.pdfIn PDF document text
- https://volgogradexpo.ru/ckfinder/userfiles/files/tamusa.pdfIn PDF document text
- http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611bf2cd4e2dd---fogadekedusitawokitodote.pdfIn PDF document text
- https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/261tmvvg8s2kakvuuvnf141j13/59704488484.pdfIn PDF document text
- https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/3339881598a7068f8d79b99236422276/64658513219.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_off0000d5b3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD5B3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000edc5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEDC5	18432 bytes
SHA-256: `6174f1f7d934ccb10cb2afef4566744f01a4bd3e4225999b3f99c78c4cfe665b`
`font_02_sfnt_off00011dbb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11DBB	10952 bytes
SHA-256: `557018120b349902cf53e1e2ed2dc6a9905d1c7ca99c31a265cc01285257f6f4`

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