PDF malware analysis — malicious · bc6363f192412581

MALICIOUS

PDF

82.7 KB Created: 2021-09-17 13:52:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: d411d30125172202ddd7b5df916ef77c SHA-1: 018f486d8aae3f0115e8036ab069fae9e1ea4b3a SHA-256: bc6363f1924125819200856436e595d5a16e3d33f855b5ca648fc7a8a0827003

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript and a large number of external links. Several heuristics indicate that these links form a link farm hosted on compromised CMS uploads, with some pointing to disposable hosting. The embedded JavaScript likely facilitates the redirection or download of malicious payloads, contributing to the phishing and malware distribution observed.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
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://coretry.ru/uplcv?utm_term=adjectives+that+begin+with+an+n PDF link annotation
- https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/1acbf339eba8f7108f1eb11ba463641f/narim.pdfIn PDF document text
- http://dorisemitchell.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gotulikifinowiripiti.pdfIn PDF document text
- https://callmarkinvestments.com/callmark/files/xebabovolopazovek.pdfIn PDF document text
- http://adhunikjewellers.com/ckfinder/userfiles/files/kelufuzujigedaminarano.pdfIn PDF document text
- http://surveycook.com/upload/tmp/202109/file/nifasisijefiduvavilofo.pdfIn PDF document text
- https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/161304ebd90266---66656124124.pdfIn PDF document text
- https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/161354f2e57870---73553101417.pdfIn PDF document text
- http://zawodydrwali.pl/app/webroot/userfiles/file/gizufasemobuwaxoj.pdfIn PDF document text
- https://dreptultau.hotnews.md/upload/userfiles/files/36689221503.pdfIn PDF document text
- http://www.aaar.cat/assets/js/ckfinder/userfiles/files/daxegepelorobadavewobabi.pdfIn PDF document text
- https://divetechmarine.com/contents/files/xikanorisigizajem.pdfIn PDF document text
- http://amongelite.com/ci/userfiles/files/wexirekazevuxosapazoli.pdfIn PDF document text
- https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/7d3d7a3c21894cc2932255cb3c57e116/wujesidipabalitaruvevepa.pdfIn PDF document text
- http://biosurfest.com/userfiles/files/81376193550.pdfIn PDF document text
- https://gobelsprofil.com/upload/files/wumamofiwomazus.pdfIn PDF document text
- http://furniture83.com/upload/files/51593862208.pdfIn PDF document text
- http://tai-yang.tw/taiyang/upload/file/ledinejevazoxanilupudan.pdfIn PDF document text
- http://ekopaczka.pl/imgbrama/files/749029844.pdfIn PDF document text
- https://learn-atdi.com/uploads/files/44428434450.pdfIn PDF document text
- http://telecycling.org/files/file/53342364857.pdfIn PDF document text
- https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/rvj3p729spk9ujufana76c6ci6/melexewipugorejex.pdfIn PDF document text
- http://kmsenior.org/file/files/senupaxukifo.pdfIn PDF document text
- http://tscyw.net/userfiles/file/20210908165610_sifbla.pdfIn PDF document text
- http://ybshajiang.com/userfiles/file/2021-09-06/210906183031303433dleabyttyew1.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_off0000de3e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDE3E	10784 bytes
SHA-256: `27995f26baf71f0f6f93630dfa853f14e12061d5ed8c66bb7784e8f8d8655202`
`font_01_sfnt_off0000f6d9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF6D9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010eeb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10EEB	17796 bytes
SHA-256: `3c48e9a2e537ca6b58c7e2933cc24a7d3a2c4c0c4961c6449d4a557b5cb9df54`

Open this report in the interactive analyzer, or submit your own file for analysis.