PDF malware analysis — malicious · 1094241351f1c5f1

MALICIOUS

PDF

72.1 KB Created: 2021-09-10 17:27:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21

MD5: 9962b4bcea9e84cdc349b788777bf02f SHA-1: 5b9f5fff207cc6c8e7c14367565ba6ab93116aae SHA-256: 1094241351f1c5f1c261a57d01fb98dbd2bbecb5708dfa3fa3285ad65aa9bcf4

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to websites hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the structure and URL patterns are consistent with a link farm designed to lure users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

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://cructi.ru/uplcv?utm_term=vidmate+vidmate+hd PDF link annotation
- http://angerdress.store/ckfinder/userfiles/files/ribamavojexetuwavuwosa.pdfIn PDF document text
- http://candleelectricals.com/uploaded_files/userfiles/files/jivugedexowinegowofoka.pdfIn PDF document text
- http://piri-piri.pl/ckfinder/userfiles/files/25860248843.pdfIn PDF document text
- https://futurefacesnyc.com/uploads/file/23562785314.pdfIn PDF document text
- http://inspiredindianfoundation.org/uploads/bifinixiwoxikisuminisevo.pdfIn PDF document text
- http://pivotal-technologies.com/userfiles/file/subidemakajovu.pdfIn PDF document text
- http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16131643bac07b---xepafixorusotifanajuj.pdfIn PDF document text
- http://sanxuatbanthinghiem.org/app/webroot/uploads/files/zelomivudixuwavexud.pdfIn PDF document text
- http://gpmpoolandspa.com/ckfinder/userfiles/files/gugokoxaf.pdfIn PDF document text
- http://montpellier-businessplan.com/mbp/upload/images/images/upload/ckfinder/vugafemugotew.pdfIn PDF document text
- http://barahi.com/assets/userfiles/files/wilozamarotenej.pdfIn PDF document text
- https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16135643176c54---kowegoganix.pdfIn PDF document text
- http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/161364e8eb88ed---jumitigo.pdfIn PDF document text
- http://pngroup.pl/ckfinder/userfiles/files/rajugasazunudiguzubi.pdfIn PDF document text
- https://fokusmedia.com/images/uploads/89711836569.pdfIn PDF document text
- https://almentispharma.com/ckfinder/userfiles/files/danuridosimezezuratuwupu.pdfIn PDF document text
- https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/161376f077fd62---kiwokupo.pdfIn PDF document text
- https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/6e61bc44139ad33a9530639aa10f0d77/16873392762.pdfIn PDF document text
- https://stka.gr/ckfinder/userfiles/files/35520439894.pdfIn PDF document text
- http://weforyou.it/userfiles/files/47685699208.pdfIn PDF document text
- https://heritagecambodiatravel.com/userfiles/file/renapupoxijodan.pdfIn PDF document text
- http://richmore.kr/uploadfile/fckeditor/file/13056110607.pdfIn PDF document text
- https://www.shipgo17.com/plugin/ckeditor/ckfinder/userfiles/files/nevanokinuvujazebun.pdfIn PDF document text
- http://windowsplusllc.com/ckfinder/userfiles/files/53973235740.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_off0000bcd4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBCD4	15660 bytes
SHA-256: `53534232e546ddfb97135de5602471db8fc5010f5e2692fe8b15b1c6daf290e2`
`font_01_sfnt_off0000e4ad.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE4AD	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000fcc4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFCC4	10008 bytes
SHA-256: `5e50a57ad293fcae516339b809018465579ea782687762f412acb560e5ec3704`

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