PDF malware analysis — malicious · 169049ff0e73e811

MALICIOUS

PDF

82.5 KB Created: 2021-09-03 21:51:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 86c3303987935576e725a0a7500a14ba SHA-1: c80be7fe3fee7e2395f684fb0cc20b07bce44122 SHA-256: 169049ff0e73e8112c66cc522d13e2c77b6bd3b565df1e2f099aaf40d9869b9b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains a link farm directing to multiple domains, some of which appear to be compromised or disposable hosting, suggesting an attempt to lead users to phishing or malware distribution sites. The presence of external URIs and link farm heuristics supports this attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

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 http://ahxxzx.com/userfiles/202107/file/supob.pdf In PDF document text
- http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1610d879bc20b9---46969333803.pdfIn PDF document text
- http://artecgroupservices.com/imagenes/file/39442546433.pdfIn PDF document text
- http://jiin-torng.com/uploadfiles/20210814195617.pdfIn PDF document text
- http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161115ba578d00---28110272260.pdfIn PDF document text
- http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adde8fea685---78169139353.pdfIn PDF document text
- http://wohingltd.com/userfiles/48010774182.pdfIn PDF document text
- http://cimkezes.hu/uploads/ckfinder/userfiles/files/rikawakatejupixafog.pdfIn PDF document text
- http://suachuaspa.com/upload/images-content/files/58962770796.pdfIn PDF document text
- http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1608199c78a3f5---12565655175.pdfIn PDF document text
- https://mashura.co/userfiles/files/14997056426.pdfIn PDF document text
- http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a55df1b14---gabijuto.pdfIn PDF document text
- https://ngusacdon.com/upload/files/92782858157.pdfIn PDF document text
- https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/2t7db8orcvm0pdcsd8lepc9v5g/gegivarosepitexez.pdfIn PDF document text
- http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d186c441d5c---rokudor.pdfIn PDF document text
- http://aklond.com/UploadFilesfile///2021050203340420.pdfIn PDF document text
- http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c57b8534911---333387914.pdfIn PDF document text
- https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/5d2f17aafc54885cfd55f0eb587fb7e8/rigesajinululadu.pdfIn PDF document text
- https://leo.tw/upload/ckeditor/files/goxelipomu.pdfIn PDF document text
- https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/85dbc8ed1317be9047f322d3d976ddc8/53678699592.pdfIn PDF document text
- http://doctour.hu/uploads/ckfinder/userfiles/files/biwiberipesuvopoxopikajaf.pdfIn PDF document text
- https://a1-recruitment.fr/v2011/Files/fck_upload/file/ribapewabonaweku.pdfIn PDF document text
- https://mvmdigital.gr/files/files/bedatebidi.pdfIn PDF document text
- http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792c2fea39a---58798902435.pdfIn PDF document text
- https://hensuyenpqa.traigiongthuha.com/ckfinder/userfiles/files/76285799777.pdfIn PDF document text
- https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b66bbef48---64488751100.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=list+of+antidiabetic+drugs+pdfPDF link annotation
- 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_off0000dce3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDCE3	10948 bytes
SHA-256: `daeeb1f6e8ad63caf8c448282aa11669253452ba301b5261e71dffb1e9484fdf`
`font_01_sfnt_off0000f606.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF606	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010e18.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E18	17528 bytes
SHA-256: `91dd81619818e5eef71285482d207788e0d3fd8042d5116ef56632668d4a1ca3`

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