PDF malware analysis — malicious · 1964271bb6b45fc4

MALICIOUS

PDF

79.4 KB Created: 2021-09-03 01:29:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 11eb1ac44954afff67783b164a4f7d57 SHA-1: df62475605909c3e6c844565eca6282b929a18ac SHA-256: 1964271bb6b45fc44146576738d0e11aa4dab90995f228fc5e806de735977e99

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers, indicating malicious intent. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the overall structure strongly suggest this document is part of a phishing campaign or a distribution vector for further malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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://infrive.ru/uplcv?utm_term=dilapidations+protocol+pdf PDF link annotation
- https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b656ee2b762---24230915972.pdfIn PDF document text
- https://monyetjoget.com/contents//files/jevufagifag.pdfIn PDF document text
- https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/0cf99277788939b34022adc3b665526c/soluxepupebed.pdfIn PDF document text
- https://miaousland.fr/ckfinder/userfiles/files/resufasijuzuribesolezum.pdfIn PDF document text
- http://musicincw.com/fckeditor/userfiles/image/bebixob.pdfIn PDF document text
- https://fanaf.comarticle_ressources/file/fifafoxorisoridam.pdfIn PDF document text
- https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/f35a430a0ad987aa973d993a545127bc/2529739455.pdfIn PDF document text
- https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610abaf9eabb9---27197470620.pdfIn PDF document text
- https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/3dd02314e87f27769654553ed9d03958/tivifufejidavaborijugerap.pdfIn PDF document text
- https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160740c7add68d---falari.pdfIn PDF document text
- http://sieuthibongda.net/ckfinder/userfiles/files/xefozunatakilejufafinale.pdfIn PDF document text
- http://abwgulfport.com/uploads/files/74645100321.pdfIn PDF document text
- http://asiadomainstore.com/userfiles/file/zadubifedesagedekos.pdfIn PDF document text
- http://tradeweb.es/userfiles/file/38582801672.pdfIn PDF document text
- http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4a46d3059---94039114014.pdfIn PDF document text
- http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b723be420f---tovedudo.pdfIn PDF document text
- https://www.andreivieru.com/ckfinder/userfiles/files/vutovugasozuwesisosam.pdfIn PDF document text
- http://naitikfashions.com/ckfinder/userfiles/files/pigufakafugoj.pdfIn PDF document text
- http://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/33052752171.pdfIn PDF document text
- https://anmimar.com/royal/userfiles/file/resirunumefa.pdfIn PDF document text
- https://cowichanseniors.ca/userfiles/file/xotogijalaj.pdfIn PDF document text
- http://gabortech.comadmin/file/9924176432.pdfIn PDF document text
- http://guoyangmoju.com/userfiles/files/16096081369.pdfIn PDF document text
- http://mevlanaasm.com/resimler/files/8007150751.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_off0000d475.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD475	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000ec87.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC87	16864 bytes
SHA-256: `84299c26d7b1089bd0e7d07130f074cf519e2f0c3e70bdbe080eb64d9ef36069`
`font_02_sfnt_off000117d8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x117D8	10480 bytes
SHA-256: `17da5b6707e0a55df67aefc483b6b7d5c3dac2f525a653f656aa004e181b83a8`

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