PDF malware analysis — malicious · 7c5ca113e0e39499

MALICIOUS

PDF

90.4 KB Created: 2021-07-31 20:47:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 2e0bccaed21bd1ffa4c0a9e49aaa0146 SHA-1: d0c109bc41fdb986eaf456ace504ad73d1c77bcd SHA-256: 7c5ca113e0e39499135ba0dda5245e433e96c0cb5b245fde7534f570458e4aa5

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous links, many pointing to compromised WordPress sites, which act as a link farm. These links redirect to other PDF files, suggesting a multi-stage redirection or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9905

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://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e272140c1b---56429318100.pdf In PDF document text
- https://pmeds.us/userfiles/file/22234071090.pdfIn PDF document text
- http://movitecnic.fr/ressource/site-image/files/40584450267.pdfIn PDF document text
- http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160abd1aa5ba51---guzofak.pdfIn PDF document text
- https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160785920f16ca---kifuvagokubelomo.pdfIn PDF document text
- http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16077fd732e517---lopalum.pdfIn PDF document text
- http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093ce289601a---paditiborebo.pdfIn PDF document text
- http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160704394ca2c7---17579365118.pdfIn PDF document text
- https://www.pepinieres-gey.fr/ckfinder/userfiles/files/rovunuwadojatodem.pdfIn PDF document text
- https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/394ab5a31f8769789e503ee7490599bc/9480828927.pdfIn PDF document text
- https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/868e4d74f91e2d20946738f79a0430ef/5047129258.pdfIn PDF document text
- http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16075ab1c567c1---250890640.pdfIn PDF document text
- https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/knp1mc5f3n8k30v6e4d535bciq/luvixevufuxekate.pdfIn PDF document text
- https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3f492bc21---16939961561.pdfIn PDF document text
- http://zxsolar.com/d/files/72611693878.pdfIn PDF document text
- https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0e3db7d67---10009648169.pdfIn PDF document text
- https://mobiligennari.com/userfiles/file/wanoxo.pdfIn PDF document text
- http://gearonlaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/batugumitiwitesoguju.pdfIn PDF document text
- http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e7cacfd7513---gilabebadibajaxen.pdfIn PDF document text
- http://kaztelcom.kz/ckfinder/userfiles/files/8075500956.pdfIn PDF document text
- http://caycanh.vn/images/fck/file/poduvowowitarenifaraxebi.pdfIn PDF document text
- http://interstroy96.ru/uploads/files/segif.pdfIn PDF document text
- http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/202161721296748.pdfIn PDF document text
- http://apcmagon.com/userfiles/pogod.pdfIn PDF document text
- http://schokobrunnen.com/idata/nogonewojikisevaxewelob.pdfIn PDF document text
- http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/16091f39be46a8---suxixepikuzuzu.pdfIn PDF document text
- https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ada88b5538c---77212049440.pdfIn PDF document text
- https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b658d35125e---legufuxenojixafiku.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=clanbook+tremere+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_off0000ffab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFFAB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000117c2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x117C2	10664 bytes
SHA-256: `76c422626f15cac38d537bf1fd07c714e2e251180f448e479c7f8d1a58e1b473`
`font_02_sfnt_off00012ff8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12FF8	16728 bytes
SHA-256: `998b816d086b4e2d375da95d2d60b4d100d46dd54ed5d0f4816b254528dc58ca`

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