PDF malware analysis — malicious · ebfada9b1f3e4b61

MALICIOUS

PDF

78.6 KB Created: 2021-09-06 18:08:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: f8d08465b4858d59b6c302722c8114b4 SHA-1: ea46cb777a35bd1bf2261d689161fa56d5884582 SHA-256: ebfada9b1f3e4b61b4da0d24da55d2e939ca6a55e2279009dd4a9bfb33666bd5

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier. It contains numerous external links, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm or phishing lure. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. While no scripts were explicitly extracted, the nature of the links and the detection name indicate a likely attempt to redirect users to malicious sites for credential harvesting or further payload delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9833

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://pixomot.ru/uplcv?utm_term=chronological+order+worksheets+pdf PDF link annotation
- https://emauto.lv/index/images/up/file/kobixidasomoxaruradore.pdfIn PDF document text
- http://bukharaalpharetta.com/sites/default/files/file/nixovokenezofu.pdfIn PDF document text
- https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/d2a03469a962f9172411fede98ad57d7/nezixorasabujuzuratev.pdfIn PDF document text
- http://askaudit.ru/price/92694300751.pdfIn PDF document text
- https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1607b81a18d097---26773500623.pdfIn PDF document text
- https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/pesr7i1qpm3ms8fu3gu4kdb3fr/7754765800.pdfIn PDF document text
- http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16091289b8cf04---21422338893.pdfIn PDF document text
- https://e-tta.com/app/webroot/userfiles/files/8881999523.pdfIn PDF document text
- http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9c4d410b4---59208846979.pdfIn PDF document text
- http://biaikatolikus.hu/files/file/35438282330.pdfIn PDF document text
- https://shiokerbau1.com/contents//files/97974230207.pdfIn PDF document text
- https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/ea4168e6a6b05c52212f37980c052df6/44853708954.pdfIn PDF document text
- https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1f6f3d31a---10900111998.pdfIn PDF document text
- https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/64c2bad80d4923c2656a072ffa9bd1b7/73156741913.pdfIn PDF document text
- https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/d6f8d840a9f798fbbdc92b8bacd33764/65453859765.pdfIn PDF document text
- http://tdjl.com/uploadfile/file///2021090322004173.pdfIn PDF document text
- http://biomax.shop/filespath/files/20210804100940.pdfIn PDF document text
- http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a74a214b130---dalonaratut.pdfIn PDF document text
- http://www.motionmantra.com/userfiles/files/kosolabokivokebon.pdfIn PDF document text
- http://angarakshaksecurity.com/userfiles/file/90726224171.pdfIn PDF document text
- http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f2b382dc1---sokawafiwi.pdfIn PDF document text
- http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bfaf654d9f---lolopogaduzeker.pdfIn PDF document text
- http://vanhoadautu.vn/static/uploads/editor/files/geratojujog.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f6742d81c74---23252763256.pdfIn PDF document text
- http://sinoorchids.com/image/file/83882657743.pdfIn PDF document text
- http://bortran.com/upload/image/file/20210621020625.pdfIn PDF document text
- http://mensagemcrista.com.br/ckfinder/userfiles/files/44313468359.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_off0000cd3c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCD3C	11108 bytes
SHA-256: `12838214089394d8c8aaf611b9f935cd399901ad7b4be98affe7394d14b5adf6`
`font_01_sfnt_off0000e704.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE704	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000ff16.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFF16	17936 bytes
SHA-256: `8a0506f9461ed0a0b380f180e522bcfab9821719f27d859a62de94127e3abda6`

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