PDF malware analysis — malicious · 0f3d780521cd7ef1

MALICIOUS

PDF

76.8 KB Created: 2021-10-12 08:21:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24

MD5: a25a88895164274bda6047943041b770 SHA-1: 3b02b5c8456ed0b534dae9d2ea6f5f75095dd445 SHA-256: 0f3d780521cd7ef114075a93e116d23e7caea3fdd7b7fd4e59cb70e8a7acfbba

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external URIs, many of which point to domains that appear to be part of a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a malicious intent to redirect users, likely for phishing or malware delivery. The ML classifier and ClamAV detection further support the malicious classification.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://yourmoneyyourbank.com/uploads/File/66267944588.pdf In PDF document text
- http://fashioneducation.ru/userfiles/file/xawewenitukataxe.pdfIn PDF document text
- https://coebmsf.com/userfiles/file/weretudexepizupuvemogag.pdfIn PDF document text
- http://saeronbio.com/userData/board/file/23570246933.pdfIn PDF document text
- http://ambvetfanini.eu/userfiles/files/66699885601.pdfIn PDF document text
- https://chimrodistribution.ro/poze_diverse/file/99782614607.pdfIn PDF document text
- http://kondicionery-dzerzhinskij.ru/upload_picture/file/99531334023.pdfIn PDF document text
- http://golden-candies.ru/webroot/files/files/leniwavi.pdfIn PDF document text
- http://195exim.com/datas/files/44658394212.pdfIn PDF document text
- https://shastriratanchatterjee.com/ckfinder/userfiles/files/92605063640.pdfIn PDF document text
- http://customize.fr/fckeditor/editor/filemanager/connectors/php/img/Editor/file/bozulika.pdfIn PDF document text
- http://mispuntossaga.com/campannas/file/10582563902.pdfIn PDF document text
- http://mfcpavpos.ru/file/fakogasupikox.pdfIn PDF document text
- http://nobody-films.com/bpms/includes/fckeditor_uploads/userfiles/file/16318590209.pdfIn PDF document text
- https://magicdiscoradio.com/userfiles/file/nonub.pdfIn PDF document text
- http://1mosref.ru/ckfinder/userfiles/files/jojilabudosupi.pdfIn PDF document text
- https://wangwangcamp.com/uploads/files/202109020431188734.pdfIn PDF document text
- http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16156b90aa7b1c---xozinabaziv.pdfIn PDF document text
- https://clubberia.com/js/ckfinder/userfiles/files/denisepojitibuj.pdfIn PDF document text
- http://demirlermetal.com/resimler/files/deloluwagujodebekaxebek.pdfIn PDF document text
- https://mumegram.com/userfiles/file/gadokakirubepaxam.pdfIn PDF document text
- http://imcborivali.org/userfiles/file/34422753191.pdfIn PDF document text
- http://aloisiquadri.it/userfiles/files/mezatodewibubeno.pdfIn PDF document text
- http://stsaischoolamritsar.com/slbdavbatala/userfiles/file/tejusudawoban.pdfIn PDF document text
- https://www.pessin-location.fr/ckfinder/userfiles/files/femufewugoxogonu.pdfIn PDF document text
- https://feedproxy.google.com/~r/Gsjc/~3/TSvcnjQ06Jg/uplcv?utm_term=another+name+for+expensivePDF 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_off0000c59b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC59B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000ddb2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDDB2	10724 bytes
SHA-256: `77818a9777fabb9fc54382e2cee0ba7d23d99188aeef0e63bf9603b50297d228`
`font_02_sfnt_off0000f634.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF634	18192 bytes
SHA-256: `f8a1a68502dde9b824c99a5f2198a2f67dcb6b3460597bab1f8d2f5ed370a9c2`

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