PDF malware analysis — malicious · 8f154eb049813867

MALICIOUS

PDF

75.0 KB Created: 2021-07-07 09:56:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 2d1ff665a13baf80b872ecd079ca1840 SHA-1: 6a343675b3f472719760c6ca85fac6e5787c841d SHA-256: 8f154eb04981386732a8bdb27b0003ebb29fd9f0e4047f352bd52ee66440ed7b

156 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 numerous links, many of which point to compromised WordPress sites acting as link farms. The presence of multiple distinct hosts and a high number of links per host suggests a deliberate effort to obscure the final destination, likely a phishing or malware distribution site. No scripts were extracted, and the document body was unreadable.

Machine Learning

Nyx PDF Classifier malicious score 0.9840

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://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088564842cde---43562272612.pdf In PDF document text
- http://sharon-barron.com/userfiles/files/pedoxefubeferoguzetosubig.pdfIn PDF document text
- http://bygreenpure.com/userfiles/file/11484567255.pdfIn PDF document text
- https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/dfa277a6330bf29f50f6c8c8e2f92c45/bamotexidazoxegafude.pdfIn PDF document text
- https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a7004a813ae---bemikabet.pdfIn PDF document text
- http://bettynblue.com/upload/fck_img/20210613/file/ninafejes.pdfIn PDF document text
- http://xn--9w3b11kh5l.com/ckupload/files/vofak.pdfIn PDF document text
- https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/nttlepnssjnco0hsg6id59jqh2/xewivekibabovod.pdfIn PDF document text
- https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/88cc54d8538f1fdd1d2838db3c71f8a3/pilesenananufodifotimifu.pdfIn PDF document text
- http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1608b5e8c459fc---69421452779.pdfIn PDF document text
- https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16082585e546c8---79797382091.pdfIn PDF document text
- https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/1b7e55e687ac46e6afb9e2e6ce2e98a0/bedujati.pdfIn PDF document text
- https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/753511ef2d8b268178c6557458fded9a/satizip.pdfIn PDF document text
- http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/16084b782cde3b---furabupabizimojopew.pdfIn PDF document text
- http://begemot-rus.com/uploadfiles/file/2021062122315973499.pdfIn PDF document text
- https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/ttlm1g9d00nvrb8frq6osa89va/43980740907.pdfIn PDF document text
- http://caratow.nl/userfiles/file/61850774272.pdfIn PDF document text
- https://sailstudy.in/ckfinder/userfiles/files/xuwolebavasokilax.pdfIn PDF document text
- https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/5d2e9b48f1396ebca94162e73973e65e/7527240565.pdfIn PDF document text
- http://banghetretruc.com/media/ftp/file/bupavenageneminiwatif.pdfIn PDF document text
- http://happyhanool.com/ckupload/files/3211703597.pdfIn PDF document text
- http://akhsmombasa.com/clients/861898/File/nixefovonafidazado.pdfIn PDF document text
- http://okmarin.ru/userfiles/file/lakijutonenim.pdfIn PDF document text
- https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/l7ialv77gjjfh05k6cu6sfeg3r/51618224943.pdfIn PDF document text
- https://bodymason.com/user_uploads/files/basabixojafob.pdfIn PDF document text
- https://loctra.net/userfiles/file/54120813231.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=vice+city+checkpoint+charliePDF link annotation
- 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_off0000c3e3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC3E3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000dbfa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDBFA	10480 bytes
SHA-256: `9a1eba0980ca633eb0f8d10207a091b127fd5b301afa0fb9aa7ee6888159d89f`
`font_02_sfnt_off0000f3c1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF3C1	16752 bytes
SHA-256: `00018c241c4147ec4e3973dbdb2abb64e8bc955d28d185478a60c7230e826bd9`

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