PDF malware analysis — malicious · 97eed065d1122275

MALICIOUS

PDF

88.1 KB Created: 2021-09-22 20:16:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: fdee8b9ef152f89623939e2519eb01c9 SHA-1: a9af97b0d306668b40e53de9e6e46f47cc7828dc SHA-256: 97eed065d112227537162e412ccba3606fad21bd69fd3594c65235ae2bcbbc62

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable hosting and are structured as a link farm. This suggests the document's primary purpose is to redirect users to malicious content, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9940

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
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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://archism.ru/uplcv?utm_term=the+eyes+darkness+pdf PDF link annotation
- http://ctcinsulator.com/uploads/file/towiwiju.pdfIn PDF document text
- http://toyotaprius-custom.com/js/upload/files/lajex.pdfIn PDF document text
- https://clubon.top/uploads/files/36345485287.pdfIn PDF document text
- http://osstemcardiotec.com/files/fckeditor/file/1958346712613cdfcc57732.pdfIn PDF document text
- http://dar-tom.pl/userfiles/file/59468573987.pdfIn PDF document text
- https://aprenda-atdi.com/uploads/files/77479276818.pdfIn PDF document text
- http://barcabianca.eu/upload/file/79526894697.pdfIn PDF document text
- https://www.adom.biz.pl/ckfinder/userfiles/files/gufosuxawake.pdfIn PDF document text
- https://doanhnghiepvietnam.niengiamdoanhnghiep.vn/img_duhoc/files/lomixoxipukufow.pdfIn PDF document text
- https://eurosan.pl/user_images/file/11109866155.pdfIn PDF document text
- https://myparrotfood.com/user_files/files/39596342354.pdfIn PDF document text
- https://makenie.com/upload/files/pejojajakemugiwujekuz.pdfIn PDF document text
- http://dges.in/userfiles/file/zatefudolirararedilokusur.pdfIn PDF document text
- http://polkovnik.su/upload/file/nokebejisom.pdfIn PDF document text
- http://vinczeandlaszlo.com/upload/fikotapabuzikokibo.pdfIn PDF document text
- http://ehomeforeclosure.org/images/file/wasifaxenoxapapivizotefa.pdfIn PDF document text
- http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614993d6688c5---misaf.pdfIn PDF document text
- http://www.verneteco.com/ckfinder/userfiles/files/35220447078.pdfIn PDF document text
- http://handsonmontessoripk.com/userfiles/files/webujivo.pdfIn PDF document text
- http://sgrdinstitutionspandher.org/sgrd/userfiles/file/wizaxobazogalamunul.pdfIn PDF document text
- https://naucharts.com/ckfinder/userfiles/files/27259300711.pdfIn PDF document text
- http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613986da92123---87352692885.pdfIn PDF document text
- https://hensuyenpqa.traigiongthuha.com/ckfinder/userfiles/files/73313726640.pdfIn PDF document text
- https://sanmuabancongty.vn/images/content/files/lifodalozejizajide.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_off0000d75e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD75E	18692 bytes
SHA-256: `f45f035ec19e55045cd49467a5c46ab7c3ccd41adeedc79d286e6a122d6f96ee`
`font_01_sfnt_off000107d9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x107D9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011fea.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11FEA	17532 bytes
SHA-256: `620e0fbd8f7e7b151c12f6e607acabff303586541b6653778e6fe7b2b97ed9ce`
`font_03_sfnt_off00013a56.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13A56	10408 bytes
SHA-256: `70a59c1907ca24ad17302f7cb41471b1b3b33a11f152dc7827c0eadbeaf6428b`

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