PDF malware analysis — malicious · c36b76964da3a3cb

MALICIOUS

PDF

87.3 KB Created: 2021-07-31 12:54:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: b1ce9635907abc06783c3fed8c803027 SHA-1: 897fbbf6f9e4cfa54cd1ad6b556cbee050e3b88c SHA-256: c36b76964da3a3cbd8d344d3aede7a8157588299083edeec3c30de756451ce28

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, specifically within formcraft plugin upload directories. These links host other PDF files, suggesting a chain of malicious documents. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure points to a link farm designed to obscure the true destination.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

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 http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bed942c9cab---63356845408.pdf In PDF document text
- http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e249171b5b---temavijovivuwazedu.pdfIn PDF document text
- https://netshopnepal.com/userfiles/file/definifekubi.pdfIn PDF document text
- https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b6d2d060a---sikarowedanejaluvigogaxa.pdfIn PDF document text
- https://villatoscana-pi.it/userfiles/file/konodakolaguwigiwoz.pdfIn PDF document text
- http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6bfd5d5c0---xevegisuwu.pdfIn PDF document text
- http://zabradli-znerezu.cz/userfiles/file/zegun.pdfIn PDF document text
- http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160c46394ce5f5---matatabozizogupasikobuji.pdfIn PDF document text
- http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607617125af5a---wofuxumukoxole.pdfIn PDF document text
- http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606ebf388d186---5233241736.pdfIn PDF document text
- https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/rr5ksam2m705oqsb3s5hug02m9/54840084292.pdfIn PDF document text
- https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160afeea215636---rukuputorofamugudigej.pdfIn PDF document text
- https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/d8ur2sm6nrsde6sgo6e4mpfkug/ganewa.pdfIn PDF document text
- https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc1215ee2c---nozalenusukoz.pdfIn PDF document text
- https://proektasis.gr/admin/spaw2/uploads/files/wedegowalobasol.pdfIn PDF document text
- https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/82af43e6282d76bd0f4c15fc7dca79a9/jalif.pdfIn PDF document text
- http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a575cc71e89---vafurebile.pdfIn PDF document text
- http://land89.com/ckupload/files/2705547286.pdfIn PDF document text
- http://0965818789.com/CKEdit/upload/files/21253000567.pdfIn PDF document text
- https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/41fdad527d46e601ef8514517772db2d/mexikelabovabenag.pdfIn PDF document text
- http://autoscuolapezzano.it/userfiles/files/65659594249.pdfIn PDF document text
- http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c64601690ca---rusome.pdfIn PDF document text
- http://thevelascofamily.com/clients/11614/File/41600723860.pdfIn PDF document text
- https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/8d502c8326257999b6d0344401c6e9ff/42871501802.pdfIn PDF document text
- https://htlexpress.com/ckfinder/userfiles/files/73357361957.pdfIn PDF document text
- http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c84dea70dd1---96886571098.pdfIn PDF document text
- http://www.maderas-navarro.com/ckfinder/userfiles/files/tuvijusapapevupolatoret.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=kinemaster+without+watermark+apkpure+free+downloadPDF 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_off0000f104.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF104	16820 bytes
SHA-256: `62ee41b2fd594637829b5cb20fe93c46601e12537ca331abb0553dcafebea3da`
`font_01_sfnt_off00011cbf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11CBF	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000134d6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x134D6	11032 bytes
SHA-256: `c06d5c626bc37fe21d4d7e6f2395f72c5b20732941ce78ae74755aed5f9ecc7b`

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