PDF malware analysis — malicious · dd0dd0cd8374c78f

MALICIOUS

PDF

80.4 KB Created: 2021-09-11 03:59:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 27ecfbbed78a83982bf0304d461c2c2e SHA-1: 170ceab97d4d961f1f16f8ec07d175ec3ff276f9 SHA-256: dd0dd0cd8374c78f7e055af69f76872e650a3cb1b8ce08484a93d67ba80f8610

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including an ML classifier and ClamAV. It contains a large number of external URIs and is described as a link farm, with many links pointing to compromised CMS upload storage. The primary purpose appears to be directing users to potentially malicious websites, indicated by the numerous unknown-reputation URLs extracted.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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://ketchas.ru/uplcv?utm_term=desiigner+panda+lyrics+video+download PDF link annotation
- https://terracetemayonetim.com/upload/ckfinder/files/fowetirataridasozekizawi.pdfIn PDF document text
- http://maturitni-ples.eu/UserFiles/File/65970887789.pdfIn PDF document text
- https://postelezmasivu-zlin.cz/ckfinder/userfiles/files/2942288905.pdfIn PDF document text
- https://ctsgroups.asia/images/file/8006984429.pdfIn PDF document text
- https://sindicav.com.br/ckeditor/ckfinder/userfiles/files/84366105735.pdfIn PDF document text
- http://haozuowenwang.com/imagefiles/file/gipeluwapobuge.pdfIn PDF document text
- http://sluchatka-shop.cz/files/upload/files/38923913871.pdfIn PDF document text
- http://koreaseowon.com/ckupload/files/gibelewofenoje.pdfIn PDF document text
- https://homecareangels.ca/files/files/files/43234700492.pdfIn PDF document text
- https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613bf059bcba5---jogopoba.pdfIn PDF document text
- http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc75d649ab---94640643423.pdfIn PDF document text
- http://99hospitalitygroup.com/ckfinder/userfiles/files/83753655832.pdfIn PDF document text
- https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/paiqeativqqqa8mjjk30di1l4d/jipiwawumirofi.pdfIn PDF document text
- http://www.florentmaussion.net/userfiles/File/88923192617.pdfIn PDF document text
- http://hondasushi.com/uploads/files/2555866974.pdfIn PDF document text
- http://agriturismolionsfarm.it/userfiles/files/34215291067.pdfIn PDF document text
- http://theclelandgroup.com/img/upload/file/jemoxavunixixazolu.pdfIn PDF document text
- http://umrllc.com/userfiles/files/fivifez.pdfIn PDF document text
- https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/r978p7h69vkkovpcl0k2q7bo7r/97351293854.pdfIn PDF document text
- http://reguitti-engineering.it/userfiles/files/zofusileruv.pdfIn PDF document text
- http://hanilkwanla.com/uploads/files/8298925311.pdfIn PDF document text
- http://tverzhilservis.ru/foktver.ru/ckfinder/userfiles/files/87786057416.pdfIn PDF document text
- http://lnaixi.com/userfiles/file/20210911071342_567055012.pdfIn PDF document text
- https://zippy-inc.com/app/webroot/userfiles/files/22280507949.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_off0000d393.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD393	10860 bytes
SHA-256: `1b587daffcdafc66d3a1a49d0344f3a31a5d12b5b4fc859ecd4891ff0d06fd03`
`font_01_sfnt_off0000eca3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xECA3	18416 bytes
SHA-256: `d1a044c22ed563ff0efc05f5ab52364d7d5b48e054836baa9d5aad0ee5069716`
`font_02_sfnt_off00011cdf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11CDF	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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