PDF malware analysis — malicious · d355ef0e34d20c5d

MALICIOUS

PDF

70.7 KB Created: 2021-09-19 05:05:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: de84181e90188a3853560ae7f16cf742 SHA-1: e6ccadd52562b067b04656a489074eb977cc14e5 SHA-256: d355ef0e34d20c5dbe292fee9dca07e8556d63d512889a476a9e929614e3004d

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 PDF files hosted on various domains, suggesting a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript (T1059.007) is a common technique in malicious PDFs.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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 http://tearose-kitchen.com/sites/default/files/images/imcefile/73148997544.pdf In PDF document text
- https://equator-maritime.com/userfiles/file/20246740324.pdfIn PDF document text
- http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1614432a8659f2---deromadepejudazibobelovu.pdfIn PDF document text
- https://ural-aiti.ru/admin/ckfinder/userfiles/files/52889602349.pdfIn PDF document text
- https://salondumariagededijon.com/userfiles/file/salijebimurabulaf.pdfIn PDF document text
- http://nacyc.jp/Upload/file/72452685896.pdfIn PDF document text
- https://corumosmanlimakina.com/js/ckfinder/userfiles/files/85912249701.pdfIn PDF document text
- http://metabolit-plus.ru/files/file/26372380538.pdfIn PDF document text
- https://jck.ro/userfiles/file/52564576361.pdfIn PDF document text
- http://ks-system.co.uk/ckfinder/userfiles/files/loturotinisurebulogupuduw.pdfIn PDF document text
- https://goldfieldssanddrags.com.au/ckfinder/userfiles/files/dovus.pdfIn PDF document text
- http://autoescuelatosal.com/galeria/files/92521616148.pdfIn PDF document text
- http://zeci.nl/im/image/74359620531.pdfIn PDF document text
- https://imagebeaute.fr/userfiles/file/27018528637.pdfIn PDF document text
- http://danies.ru/ckfinder/userfiles/files/48193836797.pdfIn PDF document text
- http://icoenergia.com/userfiles/files/1090075679.pdfIn PDF document text
- https://equipelec.fr/ckfinder/userfiles/files/43894488738.pdfIn PDF document text
- https://beautydiction.com/ckfinder/userfiles/files/35564867262.pdfIn PDF document text
- https://taptigrihnirman.com/singhania/downloads/file/xakoz.pdfIn PDF document text
- http://sun-green.eu/ckfinder/userfiles/files/90599883896.pdfIn PDF document text
- http://veszpremlizards.hu/_user/file/1929679808.pdfIn PDF document text
- http://marchmont.ru/imgs/file/vakixeseropikilamewuvun.pdfIn PDF document text
- https://pepinieramontana.ro/ckfinder/userfiles/files/mabatesigi.pdfIn PDF document text
- https://asi-filter.pl/files/file/munibekiwewebunepawop.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=how+to+connect+your+firestickPDF link annotation
- 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_off0000b69f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB69F	10504 bytes
SHA-256: `4dcd50a28174402659da51c7d55329ebc9e2161920afac15a0edfbb473d17f4f`
`font_01_sfnt_off0000cebc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCEBC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000e6ce.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE6CE	15216 bytes
SHA-256: `029f9cf0c2cb747d9bf9d5aafa37724585ffbd09bce73ce2bc8d50564122eb08`

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