PDF malware analysis — malicious · 1592ad577e9d58dc

MALICIOUS

PDF

80.6 KB Created: 2021-09-11 04:55:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: d5c77972d2098c33fb00fcb8d7d596ac SHA-1: bf55fc0f8753f72e85f56e3900612e9407a46b9d SHA-256: 1592ad577e9d58dc5878a03fdf5b79faf5c5b3c6c96c756b71e66615d2a9491b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous external URIs and link farm patterns, suggesting it's designed to redirect users to potentially malicious websites. The presence of compromised CMS upload links further supports the likelihood of this document being used for phishing or malware distribution.

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://pixomot.ru/uplcv?utm_term=horimiya+manga+pdf PDF link annotation
- https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/a1c7519132bc0977dcc82fd4d532e0fd/mufolosixewoximirodiju.pdfIn PDF document text
- https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/161320fb10d059---71851012759.pdfIn PDF document text
- http://solee56.com/ckfinder/userfiles/files/69366296285.pdfIn PDF document text
- http://cn-polylysine.com/d/files/16942197163.pdfIn PDF document text
- https://kimcert.net/E/file/bonuw.pdfIn PDF document text
- http://hanhthien.net/uploads/file/kunaxetunegifefi.pdfIn PDF document text
- http://pensjonatagat.pl/userfiles/file/75142907315.pdfIn PDF document text
- http://www.pattyn360.com/upload/forum/files/63171271097.pdfIn PDF document text
- http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16137c0bd9024a---xidusan.pdfIn PDF document text
- http://mbjarrahi.com/UploadedFiles/New/file/80271835972.pdfIn PDF document text
- https://barcelona-health.com/files/galeria/files/bozubizunivabagum.pdfIn PDF document text
- http://gsmontaggi.it/userfiles/files/67398980433.pdfIn PDF document text
- http://prograsifkalip.com/files/12423769182.pdfIn PDF document text
- https://mtmnetwork.net/uploadEditor/files/73749256005.pdfIn PDF document text
- http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137698518515---gasiwofutepox.pdfIn PDF document text
- https://haruhonpo.com/upload/haruhonpo/files/sizivavejadomipi.pdfIn PDF document text
- http://hotelclinton.it/userfiles/files/roseganaxotebudud.pdfIn PDF document text
- http://banner-ever.com/ckImg/files/82749374974.pdfIn PDF document text
- https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133554ab1970---21626052925.pdfIn PDF document text
- https://pleasanton.com/wysiwygfiles/file/68319977219.pdfIn PDF document text
- http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16138d5528e0d7---xuzek.pdfIn PDF document text
- http://gursakaryahukuk.com/images/file/fijozogima.pdfIn PDF document text
- https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/1841bc2ee49f55f12dfa0905bb1cdfd5/77291654719.pdfIn PDF document text
- https://baust.edu.bd/app/webroot/ckfinder/userfiles/files/72512469706.pdfIn PDF document text
- http://kerekagy.hu/UserFiles/file/30410910393.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_off0000d24b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD24B	10504 bytes
SHA-256: `850f4d9744cf69e9b63cbffa283ceaedda0ef90c7c9b4aaa8a3df32c86c3ac17`
`font_01_sfnt_off0000e9e2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE9E2	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000101f4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x101F4	19208 bytes
SHA-256: `54a44f7684d22a8826d022a5db0664b9ea8e74aa600cbcfbf7b783f42c133fea`

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