PDF malware analysis — malicious · cad3c4c07fce901b

MALICIOUS

PDF

82.6 KB Created: 2021-09-05 08:44:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 3da5db3eb4bde4d0ee78538eb2f222c9 SHA-1: 006669371340b1abe7de57b3335a0c851f0a8a43 SHA-256: cad3c4c07fce901b144ac8349b438573bc185cb48d60ae330c6136fa96049220

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file functions as a link farm, directing users to multiple compromised websites. The presence of numerous links to potentially malicious content, coupled with the ML classifier and ClamAV detection, strongly indicates a phishing or malware distribution attempt. The document's structure and the nature of the embedded URLs suggest an effort to lure victims into downloading further malicious payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9977

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.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1607a275ba2ed9---28517289096.pdf In PDF document text
- http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc23c10199---matejemamegawupob.pdfIn PDF document text
- http://hferrynetworks.com/FileData/ckfinder/files/20210720_636D875D74D0414A.pdfIn PDF document text
- https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/pinesobetubetenapodoj.pdfIn PDF document text
- https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/27c0cdda440be8e32c7e91469e78f1b9/jojijinofujeg.pdfIn PDF document text
- https://akemi.ro/hirek/file/14520856534.pdfIn PDF document text
- http://goteneplast.se/files/images/file/52106147943.pdfIn PDF document text
- https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c5acf0e2b26---50903529746.pdfIn PDF document text
- https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a66cf8ae36a---9844893750.pdfIn PDF document text
- https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/965ef41293fbac76ebc9630a8cbd58d1/5883237770.pdfIn PDF document text
- http://multi-accueil.fr/ressource/site-image/files/jakom.pdfIn PDF document text
- http://oshcongregation.com/userfiles/file/32204428251.pdfIn PDF document text
- http://cisseo.net/userfiles/files/54380183183.pdfIn PDF document text
- http://sys-svinding.dk/userfiles/file/lovoje.pdfIn PDF document text
- https://yourownadviser.com/ckfinder/userfiles/files/zijasuja.pdfIn PDF document text
- http://twothirdsmajority.us/clients/38522/File/kuselutigarigabekez.pdfIn PDF document text
- http://waltwhitmanclassof1965.com/clients/c/cc/ccbfa8a87e297cd67510599b8aebcb74/File/9752127655.pdfIn PDF document text
- https://regiefranchet.fr/userfiles/files/tarusozefurubokotava.pdfIn PDF document text
- http://fillaracingacademy.cz/ckfinder/userfiles/files/zujad.pdfIn PDF document text
- https://beautyyaurient.com/editor_upload/file/fusowivuwi.pdfIn PDF document text
- http://cafemsoffice.com/userfiles/files/69369609051.pdfIn PDF document text
- http://elyriahigh1974.org/clients/0/05/052ab20d644b737728595af1a47b4450/File/59346625456.pdfIn PDF document text
- http://thedreams.cz/files/zasurixo.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=research+paper+on+simulation+and+modeling+pdfPDF 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_off0000db21.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDB21	11212 bytes
SHA-256: `b94cce934a9d1db80829c4ebba967ed1a55370e978b041d987047cd5b7144656`
`font_01_sfnt_off0000f4f8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF4F8	18188 bytes
SHA-256: `82c3f99df6834043bcb8798c711a614e2acb15bb00359bd8e33e20596ac481f7`
`font_02_sfnt_off00012435.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12435	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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