PDF malware analysis — malicious · 3cc260bf0281bbd3

MALICIOUS

PDF

94.3 KB Created: 2021-07-13 21:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 334b0a59d8e4d9531c558578f0f7206d SHA-1: 43b8a92a9e8eccf727cac4035e61aa32d59d5f49 SHA-256: 3cc260bf0281bbd3e795686d3dfda29f2b8c9c9e5469ec49c0a3284125c0f39d

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains numerous external links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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://coretry.ru/uplcv?utm_term=racing+into+the+night PDF link annotation
- http://5m-tti.com/uploads/image/files/24941616199.pdfIn PDF document text
- https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a445443fd5f---55986398285.pdfIn PDF document text
- https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609077e5c45c2---lajebiwu.pdfIn PDF document text
- http://cameradungphat.com/uploads/files/rufesodolukiwob.pdfIn PDF document text
- http://lbhs1965.com/clients/6/6b/6bdd8f708684a1f547efbf97e1630fe5/File/sevireravosetove.pdfIn PDF document text
- https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/16403658cc13026e66de47649a1eed64/35335415503.pdfIn PDF document text
- http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9813dc712---migaxagelagaxesalanuzit.pdfIn PDF document text
- http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16099a1c5ecee3---fobubu.pdfIn PDF document text
- http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160913e6c862a6---72794509932.pdfIn PDF document text
- https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607626202b684---simazapifupitosulakiw.pdfIn PDF document text
- https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/91q2voce25d9lsmnneemd0d3ac/dulixif.pdfIn PDF document text
- https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/2gcnqkse3fvsn2nt304ru5rhb7/1336445473.pdfIn PDF document text
- http://lookkorea.net/userfiles/file/17333135765.pdfIn PDF document text
- https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/uerjr808mg0iot1de6hojoq1g2/fapolaza.pdfIn PDF document text
- http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a5991870ada---20618200161.pdfIn PDF document text
- https://szekszardportal.hu/userfiles/file/83392275774.pdfIn PDF document text
- http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e781d69493---10686304033.pdfIn PDF document text
- https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/4ac604726be613a1cc4ff91f97b97dbd/30272350080.pdfIn PDF document text
- https://batikatravels.com/userfiles/file/46493204103.pdfIn PDF document text
- https://www.potravinyav21.cz/ckfinder/userfiles/files/1050442192.pdfIn PDF document text
- https://cr2tek.com/userfiles/Proj_Name//files/21933274124.pdfIn PDF document text
- https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d9413e354f5---66852290000.pdfIn PDF document text
- https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/b73c1a99bbd92d6cdaf9f91ec0ca1ca9/muzerisabek.pdfIn PDF document text
- https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/853802ee31fc58ed3f674cf03a3fe6e9/66974602800.pdfIn PDF document text
- https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/5f98967c85c90f339daaad57ed29b0a2/17162105556.pdfIn PDF document text
- http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bcffceed5f0---forolip.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_off00010cd3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10CD3	17644 bytes
SHA-256: `e44981c22ff9ad72123ed98d83de1c6c29bf73a5e2168bc43261258a1fe33d91`
`font_01_sfnt_off00013b5b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13B5B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00015372.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15372	10240 bytes
SHA-256: `6cab66c9372e1fa5aff509c3f2075d437e0c3bcbdfecbc12467851c30f9eb99f`

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