PDF malware analysis — malicious · 545f6a6f42980c89

MALICIOUS

PDF

90.2 KB Created: 2021-06-26 20:48:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: f94ca6b2ed4eef5d01f66d2ad794c6ba SHA-1: cb9822c53189ba50c3869cb666c237f3fb3dc7db SHA-256: 545f6a6f42980c893b3be19cf0cb8c2f20eb918a666f625a20766b1357e7aa37

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV detection. It contains a large number of external URIs, many pointing to compromised WordPress sites, suggesting it's designed to lead users to malicious content. The presence of embedded URLs and the link farm nature of the document indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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://laborke.ru/uplcv?utm_term=how+do+i+know+if+my+water+broke+in+the+shower PDF link annotation
- https://activepymes.com/pub/file/fusujikejarerugoxunovarat.pdfIn PDF document text
- http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c40fb89ef---76770562011.pdfIn PDF document text
- https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/2ff36ec8d5c10fa1c92cd20751ac6e9b/16192880491.pdfIn PDF document text
- https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/5r87me3r89r0r64hcsdg26dh84/datomogibomogole.pdfIn PDF document text
- https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/823b92346c9f2b9d60439dc900162937/nituli.pdfIn PDF document text
- http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e606ce558d---mokafowixi.pdfIn PDF document text
- https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/h2qmhrbp56i7p61rpltpumm2hs/renusevudazoruki.pdfIn PDF document text
- http://sjhrz.com/images/upload/File/jeseleb.pdfIn PDF document text
- https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/6vgndud71jrdslb7ekfi685p11/80735219952.pdfIn PDF document text
- http://goldmustang.ru/files/files/53490582792.pdfIn PDF document text
- http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a957e365e---komipugoworemopotoxogapu.pdfIn PDF document text
- http://myshopekerala.com/userfiles/file/14966695096.pdfIn PDF document text
- https://actor-conseil.com/files/file/xavegukijuso.pdfIn PDF document text
- http://rasmesafar.net/basefile/basefiles/92821073342.pdfIn PDF document text
- https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/8b905df8c0df01c993c9e6eee62b7b0b/xubojogibawabaden.pdfIn PDF document text
- https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/nq364rbl818t9r10ttujdscuun/53365714475.pdfIn PDF document text
- https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/41869dbff0bd2111819300ea91e1c8cd/70356325066.pdfIn PDF document text
- http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607049d5a9f2c---patarupubasixim.pdfIn PDF document text
- http://pronobile.de/catalog/file/lilivijekatelar.pdfIn PDF document text
- http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f511ecb0b5---diwidujazepaninanogami.pdfIn PDF document text
- http://se-ty.ru/uploads/userfiles/file/kikakuxafofaxugasamukid.pdfIn PDF document text
- http://allprintusa.com/admin/images/file/54560935240.pdfIn PDF document text
- https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/l7n9q7vpm82a7t85ps8ciph3m7/fikezukavudev.pdfIn PDF document text
- http://musiclivemarsala.com/userfiles/files/puxug.pdfIn PDF document text
- http://cbcom.fr/ressource/site-image/files/wuzusakaz.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_off0000fafb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFAFB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00011312.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11312	10996 bytes
SHA-256: `cfb8e789f8aa8acf827fa271297f3c53e2e83ec3e6a0fddaf9e6bb6242598e2b`
`font_02_sfnt_off00012c6c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12C6C	17268 bytes
SHA-256: `f82fae2849cb855047ab62fdd82bc35bfc7e4a90935452f7c3714c0604ee57cb`

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