PDF malware analysis — malicious · 60a3452c8c8c4ee0

MALICIOUS

PDF

79.3 KB Created: 2021-09-05 06:49:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 9cfa772ef4b1e38acb5e9f367b9bca94 SHA-1: f509f5c8532fed4aa5e62b7523f90af67afab8b9 SHA-256: 60a3452c8c8c4ee01e2409eba3df45d0cb9d8302deda35f9ac9032da0d7c8111

176 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file impersonates a document signing service, a common lure for phishing attacks. It contains numerous links to external PDFs hosted on compromised websites, suggesting a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading further malicious payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9846

Heuristics 7

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.
Document signing service impersonation lure medium SE_DOCUSIGN_LURE

Document impersonates DocuSign, Adobe Sign, or a similar signing service in a signing-request context
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 http://mottaing.eu/userfiles/files/29411494436.pdf In PDF document text
- https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a49065e8809---novibura.pdfIn PDF document text
- https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/f5f30675a6858973493c738711110ee9/22953761176.pdfIn PDF document text
- http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/ir8cvdc2n9bbhl1vdjj31tct0u/xabupivafufu.pdfIn PDF document text
- https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/6433cbc3ebc4e4c336ea310e9038efb3/56276846270.pdfIn PDF document text
- http://rosg.net/sa_upload/userfiles/file/20210722061434.pdfIn PDF document text
- http://location-appartement-venise.com/italie_documents/files/patizot.pdfIn PDF document text
- http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075b68b32865---23775558333.pdfIn PDF document text
- https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f3caf511306---18898597555.pdfIn PDF document text
- http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160ae1127c9baf---1386706688.pdfIn PDF document text
- http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160aa6090282d3---kumizarujijodo.pdfIn PDF document text
- https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/1cc489d11b280e41a9bdac1c2883aca8/tesorupokavine.pdfIn PDF document text
- http://bgindus.com/t/tutorfirm/uploads/ck/files/87344924514.pdfIn PDF document text
- https://nutricount.cz/UserFiles/File/bamuvawuvulijererawora.pdfIn PDF document text
- http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105c39001598---71940384927.pdfIn PDF document text
- http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160be14d0df02a---refujusizokak.pdfIn PDF document text
- https://psychotherapie-coeppicus.ch/userfiles/files/baxofevodufuroxiz.pdfIn PDF document text
- http://frankslawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/87689317764.pdfIn PDF document text
- http://salocchi.it/userfiles/files/86125870214.pdfIn PDF document text
- http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607af6bf10c8a---tegezezokabibe.pdfIn PDF document text
- http://olynskiconstruction.com/pics/file/zujefefaweroberube.pdfIn PDF document text
- http://tomaszskiba.com/userfiles/file/bipuposoteniripexezepe.pdfIn PDF document text
- https://www.hermanosvalerorecio.com/ckfinder/userfiles/files/38679145291.pdfIn PDF document text
- https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/0d33d1ed1c85c9a9d9966b8b8a2b2934/lomalulavuselaguxozimuxu.pdfIn PDF document text
- https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8f0aef3a48---zopatuvu.pdfIn PDF document text
- http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6c6cd16b30---34328205.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=how+to+sign+pdf+with+macPDF 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_off0000d30a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD30A	10864 bytes
SHA-256: `e2584e60aa6dab61b6f5c8b7e7ff091f0264e44f052a9987f91dae8d0417b688`
`font_01_sfnt_off0000ebbe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBBE	17000 bytes
SHA-256: `aa0edb146714d1bf13a5f22ce41583909d4e6e57f19e7a61a0f8a0cccb4ec5ee`
`font_02_sfnt_off00011796.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11796	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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