PDF malware analysis — malicious · 04b5ce9d3a4d318d

MALICIOUS

PDF

81.2 KB Created: 2021-09-16 07:04:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 5c7ea8866ad87940ebecacc01b012e09 SHA-1: eb0be0041e1219a9c5b9bcd68476d4f4e9304d20 SHA-256: 04b5ce9d3a4d318d9b80cfc05e5df03bf5c2a340a9b97a8984a17392088f1eef

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is flagged by ML classifiers and ClamAV as malicious. It also exhibits characteristics of a link farm, with numerous external URIs pointing to disposable hosting, suggesting an attempt to redirect users to malicious sites. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

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://www.dean-cpa.com/files/adminpic/file/31510228666.pdf In PDF document text
- http://akiisushi.com/uploads/files/82749852671.pdfIn PDF document text
- http://spartapr.com/images/upload/file/tepizewiv.pdfIn PDF document text
- http://www.bluewhaleline.com/image/upload/File/95269041951.pdfIn PDF document text
- https://webmenuplus.com/images/file/18853798741.pdfIn PDF document text
- https://strategie-forex.com/ckfinder/userfiles/files/joxekopan.pdfIn PDF document text
- http://austral-immo.com/userfiles/files/69059589859.pdfIn PDF document text
- https://justforjetscatering.com/userfiles/image/files/53033900822.pdfIn PDF document text
- https://mollis.rs/files/kumavomafogikezoxefe.pdfIn PDF document text
- http://hyunsin.net/userfiles/file/17698134331.pdfIn PDF document text
- https://postele-z-masivu.sk/ckfinder/userfiles/files/24397545124.pdfIn PDF document text
- http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/vepesuzekokug.pdfIn PDF document text
- http://bawaconstructions.com/editorData/file/vetatodabifuj.pdfIn PDF document text
- http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f01019ada4---66268699717.pdfIn PDF document text
- http://dailythang.com/userfiles/files/kakipupabizuru.pdfIn PDF document text
- http://asclyziarskyklub.sk/userfiles/file/63771801551.pdfIn PDF document text
- http://beloezoloto.ru/userfiles/file/kexuf.pdfIn PDF document text
- http://consulcongress.it/uploads/assets/file/muwibure.pdfIn PDF document text
- http://www.benyowsky.com/resources/files/gimomirotovowix.pdfIn PDF document text
- http://wwpokebar.com/uploads/files/leromutixitoxunexodetoj.pdfIn PDF document text
- https://starfoil-mail.nl/uploads/wysiwyg/20017437110.pdfIn PDF document text
- http://pivotal-technologies.com/userfiles/file/bajogasozowujexidemusu.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=app+to+read+word+documents+out+loudPDF link annotation
- http://irodori.kir.jp/files/file/31453451906.pdfIn PDF document text
- https://tes-sys.com/uploads/ckfinder/files/20210908/16310630817517.pdfIn PDF document text
- http://louisiana-arts.org.s150269.gridserver.com/siteuploads/editorimg/file/josaris.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_off0000d7c6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD7C6	17880 bytes
SHA-256: `fb79b084a25b8b23aaad189dd33e950166ac1924158d721618d762baf61e869c`
`font_01_sfnt_off0001067e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1067E	10748 bytes
SHA-256: `96fc0571e5a0424b80f5e6082ef0066827c1dfa3d051d1306a3e473bfdc4fd0b`
`font_02_sfnt_off00011f51.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11F51	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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