PDF malware analysis — malicious · 98d6f6e00b66c39a

MALICIOUS

PDF

85.3 KB Created: 2021-09-18 17:51:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 4f3a4639c2e4a26d3e2197bf487a196a SHA-1: 54572fb295d77e918c81af150a306b4273c60a9a SHA-256: 98d6f6e00b66c39a97b06789045656e1003f797401191fe8f707cd8aa185ab4a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a lure to download further malicious payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9905

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://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0c2a5a3f0---baganazimu.pdf In PDF document text
- http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613204312db5c---jilarume.pdfIn PDF document text
- http://www.szphotar.com/admin/img/files/jimaku.pdfIn PDF document text
- https://rmduncanrealty.com/userfiles/files/22999446407.pdfIn PDF document text
- http://collegium-connect.nl/ckupload/files/vixikejimab.pdfIn PDF document text
- http://checopharma.com/upload/files/dixabezosasojax.pdfIn PDF document text
- https://digireg.lu/upload/38547016249.pdfIn PDF document text
- http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/161405ed896766---24166493052.pdfIn PDF document text
- https://syntellect.ru/Repository/file/xataxisede.pdfIn PDF document text
- http://tokyosushilohaus.com/uploads/files/30259104181.pdfIn PDF document text
- http://hejia-ele.net/upload/jugofote.pdfIn PDF document text
- http://sumosushingrill.com/uploads/files/tifikajaborelagusar.pdfIn PDF document text
- http://debseven.net/UserFiles/File/32406188091.pdfIn PDF document text
- http://ithalattagarantibelgesi.com/resimlerfiles/63525693252.pdfIn PDF document text
- https://fishboat.hr/files/xapexoneninilonisulaw.pdfIn PDF document text
- http://riggi.ru/userfiles/file/nepemifebu.pdfIn PDF document text
- http://www.feniuniversity.edu.bd/app/webroot/ckfinder/userfiles/files/wepagefezujiser.pdfIn PDF document text
- https://brincandoeaprendendo.com/fotosempresa/files/rinik.pdfIn PDF document text
- https://clinicscrm.com/img/files/33725672861.pdfIn PDF document text
- http://rileyillustration.com/images/agency/files/64728151043.pdfIn PDF document text
- https://zapcdn.space/web/img/podborky/files/werakokofufemodukasanot.pdfIn PDF document text
- http://clarklawtexas.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/woxemololoniw.pdfIn PDF document text
- http://noithatlekhanh.com/Images_upload/files/vapatavokivelofapibeseg.pdfIn PDF document text
- https://franchise-vietnam.com/app/webroot/img/files/33752988499.pdfIn PDF document text
- https://lesura.net/userfiles/file/81530133376.pdfIn PDF document text
- http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/765f52d82a78096cded80bf1108ff52d/wadexemuvutepebe.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=download+motogp+game+for+androidPDF link annotation
- https://b2cdemo.tickets.com/content/files/sisofasefojin.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_off0000e610.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE610	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fe27.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE27	10760 bytes
SHA-256: `9c64506fb08c5f899b22d2ce22f395644366c3d05ec5362d0f1b3218e00e11b0`
`font_02_sfnt_off000116aa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x116AA	18804 bytes
SHA-256: `cda21498755cac278a221b6a1de42c41425b3bca67dfb63198a02415ec773ceb`

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