PDF malware analysis — malicious · eea3965396571e9d

MALICIOUS

PDF

81.9 KB Created: 2021-09-22 19:53:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 4d18439ab7c34794840e2ca57f7a2353 SHA-1: 55d42615a5c320790d7e436a4a6f4542e2f722e3 SHA-256: eea3965396571e9d9dfe482aca7e04f85864adb40bc1c351f1839d19c22ef073

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external URIs, many of which are hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely used to obfuscate the links or perform malicious actions upon opening.

Machine Learning

Nyx PDF Classifier malicious score 0.9955

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://drafthe.ru/uplcv?utm_term=subway+surfers+hack+apk+latest+version PDF link annotation
- https://conrays.ru/f/data/birunek.pdfIn PDF document text
- http://szm.hu/userfiles/file/3832479378.pdfIn PDF document text
- http://camberwelltaxi.com/survey/userfiles/files/zawalo.pdfIn PDF document text
- http://cp-tournament.org/ckfinder/userfiles/files/46370851647.pdfIn PDF document text
- https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1614245d22a324---69827741253.pdfIn PDF document text
- http://progetec.org/userfiles/files/basoburosi.pdfIn PDF document text
- http://tizianaiberti.it/userfiles/files/zuzabepavadexo.pdfIn PDF document text
- http://gysanya.com/upload/file/210901160607274732z41bwv1g5x86.pdfIn PDF document text
- https://styliststudios.com/imagesTE/file/sixit.pdfIn PDF document text
- https://rajakedua.com/contents/files/wutogi.pdfIn PDF document text
- https://transturist.ba/ckeditor/ckfinder/files/files/bozilivafobizaninas.pdfIn PDF document text
- https://franchisefarm.franchiseharbor.com/files/files/28525808212.pdfIn PDF document text
- http://rajhansnursery.com/userfiles/file/67638907425.pdfIn PDF document text
- http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/161396120ebd03---nerurojijoravizamijitekuz.pdfIn PDF document text
- http://westfallassociates.com/documents/file/fokuxidigakijerumejupam.pdfIn PDF document text
- http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/miwaj.pdfIn PDF document text
- http://sujitonweb.com/userfiles/files/mosujavanibapagolori.pdfIn PDF document text
- http://www.tlo.ntou.edu.tw/ckfinder/userfiles/files/80462955693.pdfIn PDF document text
- https://aluvioneschicamocha.sinecsas.com/ckfinder/userfiles/files/zaraligaxerodadoberaladeg.pdfIn PDF document text
- https://perfecthospital.org/ckfinder/userfiles/files/42341028806.pdfIn PDF document text
- http://www.valathors.com/ckfinder/userfiles/files/9666288260.pdfIn PDF document text
- http://artediapharma.com/upload/files/11994223076.pdfIn PDF document text
- http://wdnederland.nl/file/zazobew.pdfIn PDF document text
- https://theatresaucinema.fr/uploads/file/mojufulojabesari.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_off0000d5bc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD5BC	18816 bytes
SHA-256: `2ab51fc4b2a5bb6716a5b7fa65600a48b9edf62b2f1ac92495daaf86430b2955`
`font_01_sfnt_off00010758.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10758	11252 bytes
SHA-256: `a827298aa7d3152ff78e3e598ed6da62248385f448ce3c0df5a474342a24029b`
`font_02_sfnt_off00012192.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12192	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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