PDF malware analysis — malicious · 0b381a1abeeef1f5

MALICIOUS

PDF

95.9 KB Created: 2021-06-30 12:19:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22

MD5: a25be4009f092b65063850cceef14a60 SHA-1: 837782e23988b6dc9abfacd8d3c335da794f84b9 SHA-256: 0b381a1abeeef1f5458378ff89927bb7473858b3f87b9b9301b6ac97d02d9105

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9929

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://chcial.ru/uplcv?utm_term=arcane+mage+builds PDF link annotation
- http://beerskiboot.de/img/upload/file/tuxifajigekurovazefir.pdfIn PDF document text
- http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16078dbde15523---pokat.pdfIn PDF document text
- https://aedwea.com/upload/foto/93040827804.pdfIn PDF document text
- http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160912a3aaceef---62805633278.pdfIn PDF document text
- https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/ad350f81104715e55505b1d0228a0478/pewavipojikulono.pdfIn PDF document text
- https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb02de5c7d---sijesukibuzegileke.pdfIn PDF document text
- https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/5136459852159dc72e9accff4511f832/70787966126.pdfIn PDF document text
- https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/1l88hjovbjomneajt7fma2ain2/91480145048.pdfIn PDF document text
- http://lube-stc.com/ckfinder/userfiles/files/13718211563.pdfIn PDF document text
- http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609323f5832b1---gezanadivuwovubodasivajav.pdfIn PDF document text
- http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f531891719---nujitudedorogavumejirov.pdfIn PDF document text
- https://immo-cjeanpaul.lu/userfiles/files/55211109357.pdfIn PDF document text
- https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077f3537ff0e---23579524443.pdfIn PDF document text
- https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/704796f66db527add5f39d239410e99e/falimef.pdfIn PDF document text
- https://europartner2.pl/uploads/tedomutaseget.pdfIn PDF document text
- http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb1c47d933d---sinakuxunomemused.pdfIn PDF document text
- https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab14079ea3d---85861053742.pdfIn PDF document text
- https://cr2tek.com/userfiles/Proj_Name//files/64026822167.pdfIn PDF document text
- https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/l6q8f7p45606psa8bfdde4r612/62984985346.pdfIn PDF document text
- https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac8780220c---76079153372.pdfIn PDF document text
- http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160741c610b9e7---nozenofevutoxokajuduxa.pdfIn PDF document text
- https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/si3ro2nd21lmeri778l1k0ceua/34670838235.pdfIn PDF document text
- http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d7d94a0a3---83922412889.pdfIn PDF document text
- http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b53a2908b8---86859552444.pdfIn PDF document text
- https://angelsstaff.com/uploads/file/88552671289.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_off0001156f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1156F	10716 bytes
SHA-256: `d246d2a7c8422c14173b71e33115f15bb000a861480bb1830af19107ee3d89c2`
`font_01_sfnt_off00012dca.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12DCA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000145dc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x145DC	17064 bytes
SHA-256: `ac600cd289a8718f04bcbc5b7bfd092cbca763176e799fa1f6875aaf41eda691`

Open this report in the interactive analyzer, or submit your own file for analysis.