PDF malware analysis — malicious · a78a4f68d3c22af1

MALICIOUS

PDF

83.7 KB Created: 2021-09-12 09:08:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31

MD5: b9ccf9e3a7ea2f5d7fca9bc17ba113ce SHA-1: 0d2c980c968dc5bd5840d201e702fde291fe721b SHA-256: a78a4f68d3c22af18474edb8a3776c60521a95a3964fe33827628a6b36b3ba49

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous links to disposable hosting, identified as a link farm, strongly suggests a phishing or redirection attempt. The embedded JavaScript likely facilitates the redirection or download of further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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://bahispesinde.com/gnc/veri/_files/kazinitoxafifizazawud.pdf In PDF document text
- https://ehotelgateway.com/bot/ckfinder/uf/files/11090973925.pdfIn PDF document text
- http://tetrafluoro.com/upload/files/rirufajoxoba.pdfIn PDF document text
- http://xn----dtbhwhggdaoqfh3d.xn--p1ai/media/file/xorewipuj.pdfIn PDF document text
- http://pierrevillers.fr/mairie_files/file/35675432271.pdfIn PDF document text
- http://pushgroup.lv/userfiles/files/82415077199.pdfIn PDF document text
- http://mynigaoe.com/upload/file/20210909043347.pdfIn PDF document text
- https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/oamn8hororhuc0kshdad73dtvj/82087489920.pdfIn PDF document text
- http://tinavaron.com/ckfinder/userfiles/files/bipevotojukuwuleduno.pdfIn PDF document text
- http://www.lalorraineperdue.com/documents/22271762824.pdfIn PDF document text
- http://www.web-globus.de/ckfinder/userfiles/files/newakesozijodufufufezepo.pdfIn PDF document text
- http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ecf114ea49---86475789255.pdfIn PDF document text
- https://negaratoto.com/contents/files/zumunizulew.pdfIn PDF document text
- http://secretinvitation.net/images/files/92206378284.pdfIn PDF document text
- http://studiocariola.com/userfiles/files/madafawudatud.pdfIn PDF document text
- http://exdebt.bg/userfiles/file/kakajem.pdfIn PDF document text
- http://karpatskiles.ru/store/file/puzipos.pdfIn PDF document text
- http://kurumakaitori-one.com/js/upload/files/53445029951.pdfIn PDF document text
- https://e-tta.com/app/webroot/userfiles/files/lefuz.pdfIn PDF document text
- http://xn--h1agcmh.com/ckfinder/userfiles/files/59094368345.pdfIn PDF document text
- https://weeb.nu/userfiles/file/27704088087.pdfIn PDF document text
- http://montagnobozzone.it/userfiles/files/vajazezas.pdfIn PDF document text
- https://benqmusicworkshop.com/fupload/file/vedanujosizasixapetotav.pdfIn PDF document text
- https://moraure.net/js/ckfinder/userfiles/files/sutaloxurisajenivelin.pdfIn PDF document text
- https://xn--hjrnskadeakademien-mtb.se/userfiles/file/tivejok.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=senior+android+developer+requirementsPDF 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_off0000dc40.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDC40	10940 bytes
SHA-256: `2614ab9f5e648b128a4fd79b4c9ddb6b7e7fdb8ca84078918bb6bb1f0cbbc2d5`
`font_01_sfnt_off0000f55f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF55F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010d71.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10D71	19644 bytes
SHA-256: `87a9f5cbc5a1295f5e36d0b71d5354ab4f3b4d0e36798aa183625d0aacdf59f1`

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