PDF malware analysis — malicious · 9e07577e55257cae

MALICIOUS

PDF

77.5 KB Created: 2021-09-13 19:34:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 50ac1313858e85d89e7eab7335b8c9d9 SHA-1: 2741c6eb7696c909782ef2fd14e7f4ddcf40f6a8 SHA-256: 9e07577e55257cae3a580993c69eafb38538fde8e5795afdb3d3da99dbd3012d

132 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, including a link farm hosted on disposable domains and compromised WordPress sites. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent, likely to redirect users to phishing pages or download further malware. The presence of JavaScript indicates potential for client-side exploitation or redirection.

Machine Learning

Nyx PDF Classifier suspicious score 0.3475

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
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
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://boki.hu/editor_up/zunujanimixavogujavididi.pdf In PDF document text
- https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/a1da92b36f7b6b0443e4e10738a275ba/wasimomejojimorawi.pdfIn PDF document text
- https://almuhja.com/ckfinder/userfiles/files/42012897741.pdfIn PDF document text
- http://runwellconsulting.com/file/file/40942196327.pdfIn PDF document text
- https://el-tall.pl/pics/file/35263864078.pdfIn PDF document text
- http://cargologicru.com/sadm_files/kutewixu.pdfIn PDF document text
- http://akiyastyle.com/app/webroot/js/ckfinder/userfiles/files/sirigo.pdfIn PDF document text
- http://lsbwg.com/ckfinder/userfiles/files/20210908/1713533458.pdfIn PDF document text
- https://wilocom.ro/ckfinder/userfiles/files/95959966956.pdfIn PDF document text
- http://svazekobciorlice.cz/userfiles/file/92332963546.pdfIn PDF document text
- https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/s0vjumnq9aupn2h39ooqgplu8f/noxakimewurawiku.pdfIn PDF document text
- http://cambridgekapurthala.com/damana/userfiles/file/mupidexopigajevejeg.pdfIn PDF document text
- https://datxeninhbinh.com/data/dulieu/files/lufobujegaxudole.pdfIn PDF document text
- https://steammining.com/userfiles/file/madigazunitolanuj.pdfIn PDF document text
- http://www.bongbansaigon.com/uploads/files/selewus.pdfIn PDF document text
- http://letdentalab.com/img/files/24665329155.pdfIn PDF document text
- http://veitali.com/upload/files/tidusawu.pdfIn PDF document text
- https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131a914ea96a---41021879546.pdfIn PDF document text
- https://fnb-concepts.com/images/uploads/files/96003596702.pdfIn PDF document text
- http://www.louisianarebarcontractor.com/editorimg/file/21560267791.pdfIn PDF document text
- https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/a6635d71a8536ff5448600fb01aebbda/66965399255.pdfIn PDF document text
- http://jingyilin.org/uploads/file/zudakanoti.pdfIn PDF document text
- https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb9f0791e5---govibubili.pdfIn PDF document text
- http://caminodesantiagoenmoto.com/assets/ckfinder/core/connector/php/uploads/files/dirugiro.pdfIn PDF document text
- http://myrbacken.se/login/ckfinder/userfiles/files/99169928295.pdfIn PDF document text
- http://nenayu.com/filespath/files/20210912225913.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=oedipus+seneca+pdfPDF link annotation
- 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_off0000d876.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD876	18048 bytes
SHA-256: `72ff64f2a35d9c943cdcc0d8c23ee215a0978437199fbed2de4f2432b94ad12e`
`font_01_sfnt_off00010788.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10788	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011f9f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11F9F	10372 bytes
SHA-256: `1896b1b1f52388a4ce420f9b84e2047c477c013a04edeae18c8921437e04b561`

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