PDF malware analysis — malicious · c700a434343db0d6

MALICIOUS

PDF

78.1 KB Created: 2021-09-16 18:05:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31

MD5: 4f2c61f160df1f7a9dbbafd5009a543b SHA-1: 5cc55cdb964a6da6c3b3d9a77a48e60a68e523c0 SHA-256: c700a434343db0d691e881c5bd191e130c1316acd81c6934838c6ea60f2001c0

162 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and numerous external URIs, many of which are part of a link farm hosted on disposable or compromised domains. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are designed to deceive users, potentially for phishing or further malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.5306

Heuristics 6

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
External URI info PDF_URI

PDF contains an external URL action
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://inwebjor.ru/uplcv?utm_term=command+and+conquer+android+offline PDF link annotation
- http://hoadon-dientu.net/images/files/xepopuvirumekelabuvet.pdfIn PDF document text
- https://vocembalo.ch/userfiles/file/dulepikufiba.pdfIn PDF document text
- http://thenikharvconsultancy.com/userfiles/file/8192112471.pdfIn PDF document text
- http://paradisetnl.com/FileData/ckfinder/files/20210905_25E6232DA753E2F1.pdfIn PDF document text
- https://vieclamday.com/userfiles/file/gogav.pdfIn PDF document text
- https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/9cd86230ae3049b39edc626157ff8fe4/76300977912.pdfIn PDF document text
- https://jungleflightchiangmai.jungle-flight.com/Uploads/files/janudofif.pdfIn PDF document text
- http://donghotam.com/luutru/files/16405978083.pdfIn PDF document text
- http://batterseataxi.com/survey/userfiles/files/249473371.pdfIn PDF document text
- https://ls-machinery.com/uploadpic/files/202109081523042189.pdfIn PDF document text
- http://machinesupplier.cn/data/product/file/202196_123935_646.pdfIn PDF document text
- https://cryptoshift.be/anaeter_capital/siteadmin/userfiles/files/71922527200.pdfIn PDF document text
- http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614344385b962---tunapokedefif.pdfIn PDF document text
- https://keluargamimpi.com/contents/files/57463766702.pdfIn PDF document text
- https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134608255e33---54983076565.pdfIn PDF document text
- https://sonerofset.com/userfiles/file/15975727533.pdfIn PDF document text
- http://mizuho-co.net/file/ck/files/1564455545.pdfIn PDF document text
- https://halkum.rs/files/bofuwefarikaz.pdfIn PDF document text
- http://vnndt.com/Images_upload/files/sidajosadifebuletude.pdfIn PDF document text
- https://chief-moving.com/editor_upload/file/86325282126.pdfIn PDF document text
- http://theofficeplus.com/userfiles/file/zarud.pdfIn PDF document text
- https://nolimitscenter.be/peausitive/images/FCKeditor/file/sivudibugutifelavozo.pdfIn PDF document text
- http://tarp.longi.tw/uploadfiles/tubirosipudewafoxosupum.pdfIn PDF document text
- https://empezo.xyz/js/ckfinder/userfiles/files/64524354404.pdfIn PDF document text
- http://fernandopelosini.it/userfiles/files/nuzeranibaxosupik.pdfIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f0da.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0DA	18632 bytes
SHA-256: `192a9c748277188002b2b6c5398880e530f8c47d38dbe4e99e5b85a0eb602e60`
`font_01_sfnt_off000120d2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x120D2	10648 bytes
SHA-256: `75e98d2435f5e4c78291b60864f9188483e1c395b49ed965b1193b72ffc002b5`

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