PDF malware analysis — malicious · 4d8cd41b6cf36949

MALICIOUS

PDF

69.1 KB Created: 2021-09-04 15:25:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 3f9baa2a9d6f02e1144c0df1ef48cde5 SHA-1: d7c0c6046e98d10bf11d276f47bc884c639ac203 SHA-256: 4d8cd41b6cf36949ea0e4561c71fc259baeda36004ffa0d0af0084e10516728d

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to numerous websites, many of which are hosted on compromised CMS uploads or disposable hosting. The primary purpose appears to be directing users to potentially malicious or phishing sites.

Machine Learning

Nyx PDF Classifier malicious score 0.6872

Heuristics 5

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
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://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/c7e19e8f99f4e8e0b2a9032e347c6556/19649616775.pdf In PDF document text
- http://sieuthihatgiong.vn/webroot/img/files/gesibakazewegepu.pdfIn PDF document text
- https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c00afedc100---12349347761.pdfIn PDF document text
- http://fu-xin.tw/uploads//files/202108080005505306.pdfIn PDF document text
- http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c8e0207859---dozes.pdfIn PDF document text
- https://fundacjaartfreeart.pl/userfiles/file/garobupiselosexerixeziku.pdfIn PDF document text
- https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/mtffe307ot9a4q4ivd0josu0h8/jiwuzekukeluv.pdfIn PDF document text
- http://triyoga-tv.ru/userfiles/file/11823627938.pdfIn PDF document text
- http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/i89k289iq1apgahakepq9b2rf5/xovozibe.pdfIn PDF document text
- https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/b3857b70e92b18e4917f2abf3ac695c2/47025351795.pdfIn PDF document text
- http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609c13c5c954d---34369243643.pdfIn PDF document text
- http://tokyoracing.hu/userfiles/file/disixosafawunekoveza.pdfIn PDF document text
- https://avenue102.com/uploads/file/88585012089.pdfIn PDF document text
- https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/f2a5dbf762bb659f423b34bcafb7bf67/vusojivobarevatex.pdfIn PDF document text
- http://songhandiban.com/uploadfile/file/2021062821232573499.pdfIn PDF document text
- http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd2ac8e76fe---31770314489.pdfIn PDF document text
- http://brette-animation.com/userfiles/file/33398188079.pdfIn PDF document text
- https://fourseasons.events/wp-content/plugins/super-forms/uploads/php/files/37db3d3943fe274489d53807f1703e9f/51242762308.pdfIn PDF document text
- http://renovfab-menuiserie.com/userfiles/file/32371574113.pdfIn PDF document text
- http://waltwhitmanclassof1965.com/clients/c/cc/ccbfa8a87e297cd67510599b8aebcb74/File/dudarovivalo.pdfIn PDF document text
- http://woodsfamilypride.org/clients/2/2c/2c83419adcf4927d74d3defe18342386/File/75779423412.pdfIn PDF document text
- https://opuntia.eu/wp-content/plugins/super-forms/uploads/php/files/c676a4257f21e565947487e58a48447f/kexupilotunutilegujoki.pdfIn PDF document text
- http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa505bad61b---vejizepot.pdfIn PDF document text
- http://studioaeditecne.it/userfiles/file/vejixopotejotu.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=vicks+v745a+humidifier+manualPDF link annotation
- 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_off0000c0c3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC0C3	18360 bytes
SHA-256: `54f037cdfef7310a2d9008c1aa2d9ffbfc61732480ad0887c2a0e5d47185388a`
`font_01_sfnt_off0000f069.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF069	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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