PDF malware analysis — malicious · 7e0bdae573f8e3dd

MALICIOUS

PDF

111.2 KB Created: 2021-07-07 19:54:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 8f0a839dfec0f45186ab3fee87f6a15f SHA-1: 5567418b6d1da53d79b2d3b6a6a509afa6d8641a SHA-256: 7e0bdae573f8e3ddcb05e5e855caf633a9a2c3a5e322768f6bcfc8978b9b38fc

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, many pointing to WordPress upload directories on distinct hosts, indicating a link farm designed to redirect users. The ML classifier also flagged this PDF as malicious with high confidence. The presence of these links suggests an attempt to lure users to potentially malicious sites, likely for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9666

Heuristics 5

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://irlanc.ru/uplcv?utm_term=verbs+followed+by+infinitive+without+to PDF link annotation
- http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a53efe3eb04---kegosufepiguneme.pdfIn PDF document text
- https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/6ee2kdcr139qksq7fpqokc0os4/delokuwojiguvijokodukeva.pdfIn PDF document text
- http://hagelkonzept.de/userfiles/file/26618229077.pdfIn PDF document text
- http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9b8fe0237---73372206885.pdfIn PDF document text
- https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096537dd4b89---85288138296.pdfIn PDF document text
- https://badrivishal.com/media/35049729241.pdfIn PDF document text
- https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/06c71f2a6520bf00f3326116dd022d9f/4616485656.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b29a43dcfbd---27133333581.pdfIn PDF document text
- http://adance0112.com/upfile/editor/file/fupugojuxorolutirefe.pdfIn PDF document text
- https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9839e8cd5---bipoluxodosumonomapizimat.pdfIn PDF document text
- https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/1df9455aa981a17fee6572573eab200e/gajote.pdfIn PDF document text
- http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160a7dcc9ba74c---junure.pdfIn PDF document text
- http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160893d360a335---28621774816.pdfIn PDF document text
- http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160750bec93403---joxoduzafi.pdfIn PDF document text
- http://mcutech.net/upload/2021/06/file/16248170561946355219.pdfIn PDF document text
- https://mepho.hu/ckfinder/userfiles/files/volazini.pdfIn PDF document text
- https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf9c4260c4---8066472686.pdfIn PDF document text
- https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/9c840fb20b5002a6b6a519d2206b8b78/38698729139.pdfIn PDF document text
- http://noithatnhapkhaugiasi.com/luutru/files/sesekejulenibafelonipigof.pdfIn PDF document text
- https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/67dd4fc8af92bb0d3c019b0788c29bbc/71733852317.pdfIn PDF document text
- https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8d6442d61---26785173515.pdfIn PDF document text
- http://annandale1963.com/clients/69704/File/84319719350.pdfIn PDF document text
- http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091a0aa32892---xaxixadifu.pdfIn PDF document text
- http://onlineticketreview.com/images/file/9879042050.pdfIn PDF document text
- http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc40532ded---14287291960.pdfIn PDF document text
- https://nisahanpin.com/calisma2/files/uploads/lilululega.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00012598.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12598	16444 bytes
SHA-256: `f2fa3593d47f4f9e90450355abfc2d2346637af93175edf7d85ba91d70c21a1b`
`font_01_sfnt_off00013c65.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13C65	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001547c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1547C	10764 bytes
SHA-256: `4c274d2b57ce6dc48ae997e5b7ae81cba76efe5913cf8c5d45eb40cebe11a3b2`
`font_03_sfnt_off00016d3a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16D3A	26228 bytes
SHA-256: `1936445557488b3c5657589ccc2948c7206faee413157aa37c50d97eb9032809`

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