PDF malware analysis — malicious · e1200cd6bf7b6afb

MALICIOUS

PDF

81.0 KB Created: 2021-09-23 05:57:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 3d0475fb04fee468d1cfba94c56c3da0 SHA-1: 8ab59d61eaa3fc8c332fe848ddb141a4792ea2ec SHA-256: e1200cd6bf7b6afbdc0a2f5ff41b78d775c1d0afef4c913b837378f72a0b62f0

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating a malicious intent to redirect users to potentially harmful websites. The ClamAV detection and ML classifier strongly suggest this PDF is a phishing or malware distribution vehicle. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports that the document is designed to host many links, likely for SEO manipulation or to spread malicious content.

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://queure.ru/uplcv?utm_term=wot+blitz+cheats PDF link annotation
- http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/16131bd2f50616---75355876191.pdfIn PDF document text
- https://fjhi.org/userfiles/file/rurinetefavinemakiwusap.pdfIn PDF document text
- http://baracenter.be/userfiles/file/25409721733.pdfIn PDF document text
- https://quangcaowebsite.vn/uploads/files/fifirobipepopiledomize.pdfIn PDF document text
- https://beeshark.ro/app/webroot/files/userfiles/files/13709011911.pdfIn PDF document text
- http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613875db78cb0---21634647457.pdfIn PDF document text
- https://actorconseil.com/files/file/wefunelowaga.pdfIn PDF document text
- http://vietsonplastic.com/uploads/userfiles/file/9249697948.pdfIn PDF document text
- http://actlogistic.vn/upload/editor/files/4638733968.pdfIn PDF document text
- https://fsbulletsandbrass.com/userfiles/files/38722496122.pdfIn PDF document text
- http://educasters.co/ckfinder/userfiles/files/nopedugumanokagerirunifej.pdfIn PDF document text
- http://dailynewsodia.com/assets/ckfinder/core/connector/php/uploads/files/35806284703.pdfIn PDF document text
- http://www2.grupoksl.com.br/js/ckfinder/userfiles/files/415136885.pdfIn PDF document text
- http://avvocatoandreabruschi.it/userfiles/files/luzubupowi.pdfIn PDF document text
- http://bippex.com/filespath/files/20210920101419.pdfIn PDF document text
- http://www.leasebridge.com/CKUPimg/files/naxotumepodekaxaf.pdfIn PDF document text
- https://stalbeckers.nl/userfiles/image/file/60501820537.pdfIn PDF document text
- https://listapp.in/ci/userfiles/files/lipuroposikedifijagev.pdfIn PDF document text
- https://tectrongim.com/uploads/file/47383306866.pdfIn PDF document text
- http://drsrkbedcollege.com/ckeditor/ckfinder/userfiles/files/10120855501.pdfIn PDF document text
- http://fapannimario.it/userfiles/files/bawobuzajakejufokebe.pdfIn PDF document text
- https://cuatudongsaigon.vn/uploads/files/wurujijabaza.pdfIn PDF document text
- http://hkalc.com/userfiles/sozanawo.pdfIn PDF document text
- http://www.jindatunnel.com/up_files/file/95212307668.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_off0000d9a3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD9A3	10316 bytes
SHA-256: `a63e1ba6c12a0492b63450ceae445153547a2079d9344cf8226032a78884950b`
`font_01_sfnt_off0000f124.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF124	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010936.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10936	17564 bytes
SHA-256: `66ec2a1962751325f618a45f015259a59a43b8f23989d7d28642278798ee24db`

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