PDF malware analysis — malicious · ae05846d493cc8f6

MALICIOUS

PDF

83.8 KB Created: 2021-09-23 20:59:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 78f520a96228f26f6b1d65751ac346be SHA-1: 4db0e8c51d8614e0e53c4331513e7e815bd72064 SHA-256: ae05846d493cc8f67befba0a2b40f2a8eabea7578baae2cddb2113fc391ed135

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are part of a link farm 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 a common technique for initiating malicious actions within PDF documents.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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://irlanc.ru/uplcv?utm_term=ps4+redeem+codes+free+2021 PDF link annotation
- https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16145a740dcd72---70650359067.pdfIn PDF document text
- http://stsmcc.org/www/js/ckfinder/userfiles/files/serafigazudirev.pdfIn PDF document text
- http://ulv-fogger.ru/d/files/reteso.pdfIn PDF document text
- http://badaranquehablar.com/userfiles/files/67520699569.pdfIn PDF document text
- https://ezokniga.com/uploads/file/xipiwanidodudulexegojegid.pdfIn PDF document text
- https://impulsa.mantareys.net/uploads/plantillas/files/80269938235.pdfIn PDF document text
- https://csam-villepinte.org/uploads/images/file/zizogapuzixudusuj.pdfIn PDF document text
- http://sasmedm.com/www/js/ckfinder/userfiles/files/42568695710.pdfIn PDF document text
- http://klgd.spokoino.ru/i/upload/files/wozekedagodopefusufu.pdfIn PDF document text
- http://jongauger.com/ckfinder/userfiles/files/86993359185.pdfIn PDF document text
- https://sportyou.fr/ckfinder/userfiles/files/36226725992.pdfIn PDF document text
- https://tigaintan.com/contents/files/megilon.pdfIn PDF document text
- https://jaurrieta.net/USERFILES_JAURRIETA/files/bekematirixizepobonivife.pdfIn PDF document text
- http://jinruily.com/UploadFile/file/20210912105728203.pdfIn PDF document text
- https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/hctbfcaientmj9avk8rdoj6u4q/35506435330.pdfIn PDF document text
- http://maketmaster.ru/admin/ckfinder/userfiles/files/75403876032.pdfIn PDF document text
- https://fotobolfestmeny.hu/mvc/userfiles/file/togegepivobutuvokilop.pdfIn PDF document text
- http://agrobud.net/uploaded/file/pifopefilemiz.pdfIn PDF document text
- https://kiaavcilar.com/upload/ckfinder/files/56565542070.pdfIn PDF document text
- http://auto-rad.pl/userfiles/file/zaruvagibuwezedaxo.pdfIn PDF document text
- https://euinsuti.ro/app/webroot/files/userfiles/files/89584990187.pdfIn PDF document text
- https://rozynoklinika.lt/userfiles/file/bufogupexisumi.pdfIn PDF document text
- http://theexplorerthai.com/userfiles/files/refotikob.pdfIn PDF document text
- http://naszemotyle.natura2000.pl/imgturysta/files/64161234512.pdfIn PDF document text
- http://alibabashipping.com/userfiles/file/87376842728.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_off0000e24b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE24B	10508 bytes
SHA-256: `998e2536e3973d508e4632e84b46357fbe4a1c8327a52f7e0b04116c14fb3be3`
`font_01_sfnt_off0000fa52.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA52	17988 bytes
SHA-256: `5b38a04a38a12b4f1ea60ca50d57b7a933f748a10c30034bb013e9925de7f84d`
`font_02_sfnt_off00012934.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12934	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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