PDF malware analysis — malicious · 7e3c6808731a28c9

MALICIOUS

PDF

72.5 KB Created: 2021-09-25 15:22:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 2723fa02d6a29dd47906e7bf2ae80bc0 SHA-1: 4f03fcf25285cff6d5349acd8e16903c6f6246ac SHA-256: 7e3c6808731a28c998be379e40e0b5b4310371206c93c692f79cf738485ade87

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and multiple external URIs, indicating it is designed to redirect users to malicious websites. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM and ML_NYX_PDF_MALICIOUS firings, along with the ClamAV detection, strongly suggest a phishing or malware distribution campaign. The embedded JavaScript likely facilitates the redirection or execution of a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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://smidgel.ru/uplcv?utm_term=letter+to+homeowner+from+potential+buyer PDF link annotation
- https://iword.de/userfiles/file/piwanebamisowukepoponamon.pdfIn PDF document text
- http://cathyourhair.nl/js/ckfinder/userfiles/files/13940706906.pdfIn PDF document text
- http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cbcbe44d31---32356541763.pdfIn PDF document text
- http://muacuoi.vn/Pictures/files/66522043142.pdfIn PDF document text
- http://stin-verdon.fr/assets/Image/files/mowedifaludonireregil.pdfIn PDF document text
- https://facades-et-traditions.com/actualites/file/mulawumixuwiwitasuzedolik.pdfIn PDF document text
- https://norservis.cz/files/files/kekamotosa.pdfIn PDF document text
- http://ibtaker.ps/userfiles/file/79121433411.pdfIn PDF document text
- https://oriontradecom.com/ckfinder/userfiles/files/kitizuvesikolarug.pdfIn PDF document text
- http://tiwtactic.com/userfiles/files/93397112502.pdfIn PDF document text
- https://demircanticaret.com/userfiles/file/20612699770.pdfIn PDF document text
- https://smg.bid/ckfinder_userfiles/files/94620376846.pdfIn PDF document text
- http://muabannhagiare.net/images/uploads/files/torapixabutefarikeg.pdfIn PDF document text
- http://allier-genealogie.org/File:/totiruko.pdfIn PDF document text
- http://fotografiafrancescosomma.com/userfiles/files/93857805389.pdfIn PDF document text
- http://rana-international.com/userfiles/files/52236133667.pdfIn PDF document text
- http://newgrids.com/userfiles/file/xabefilibibixavuz.pdfIn PDF document text
- http://licausi.it/userfiles/files/89187332644.pdfIn PDF document text
- http://usa-ex.com/images/blog/file/wukulovenuxivofoxejox.pdfIn PDF document text
- https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/7s2756tiqs2ui99h49u5jltdbg/34444897321.pdfIn PDF document text
- http://ecohouse-lab.de/userfiles/file/4189377058.pdfIn PDF document text
- http://ekorob.pl/userfiles/file/rugexeput.pdfIn PDF document text
- https://economiadecomunion.com/ckfinder/userfiles/files/16864885793.pdfIn PDF document text
- https://escaletravel.com/userfiles/files/gomobonune.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_off0000b6dc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB6DC	17452 bytes
SHA-256: `601b8f2779d9ad378b90f2aa20bc33c0464c1de192350a17a8c803c65368025f`
`font_01_sfnt_off0000e343.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE343	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000fb5a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB5A	10852 bytes
SHA-256: `ec2ee33b5b64784fb61ffd6eac13bef5cd7cbe3f406ab562ce49104f90ee1d2b`

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