PDF malware analysis — malicious · 8a25e30a1d81e165

MALICIOUS

PDF

88.6 KB Created: 2021-08-12 08:11:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: abc7b07b83e260fd5e2875a364900a1e SHA-1: 5193ab77d9bd9aa9e4c4e0f29fb8c929cc178aae SHA-256: 8a25e30a1d81e165c77eebed1ec23b178fd4c49e6aca8ce1f28293172530d5bf

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous embedded URLs that point to various websites, some of which are hosted on compromised WordPress installations. The presence of these links suggests an attempt to lure users to malicious sites for phishing or further malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9919

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
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://wastran.ru/uplcv?utm_term=what+is+moral+education+uae PDF link annotation
- https://prestinieurope.ch/userfiles/files/91094995710.pdfIn PDF document text
- http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160c011af37bf8---73740747999.pdfIn PDF document text
- https://theatresaucinema.fr/uploads/file/36360256748.pdfIn PDF document text
- https://asiajitu.com/contents//files/19813586046.pdfIn PDF document text
- https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/901bd10909e5714f6af3e37729be757f/23596672969.pdfIn PDF document text
- http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16081ad43f022c---lizedesiwonumusofopilot.pdfIn PDF document text
- https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ff3c5ba55---47765362479.pdfIn PDF document text
- https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/64a3b13ce413be36bf9a6f6c769d6f7d/52779072315.pdfIn PDF document text
- https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4cfe63a25---36402097700.pdfIn PDF document text
- https://learn-atdi.com/uploads/files/taneregosejezenefoxile.pdfIn PDF document text
- http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/rt6hn7ipd7q7t1nshbqu4m8s11/15935667032.pdfIn PDF document text
- http://studiopedrazzini.eu/userfiles/files/36652859792.pdfIn PDF document text
- http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd5d091a61---78626630343.pdfIn PDF document text
- http://byecook.com/ckupload/files/jifutumepisubuwu.pdfIn PDF document text
- https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c401260721---pimefugewisigiboburaxad.pdfIn PDF document text
- https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/c82e16b6826064de991be1a9df0dc564/gopexilesiwazuk.pdfIn PDF document text
- http://pusancard.com/userData/board/file/sakewube.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b77fe0d928f---98079215239.pdfIn PDF document text
- http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/161003a7adf103---4850349861.pdfIn PDF document text
- https://aslplastic.com/ckfinder/userfiles/files/89162952726.pdfIn PDF document text
- http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087d1e010431---kafavumupobadudexedamuvow.pdfIn PDF document text
- https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/a590cd63ed62ca3b24f376dea72cce59/jevuwumetapuk.pdfIn PDF document text
- http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/g2uah6fjcq6ek280uhp2sh8c72/47488168320.pdfIn PDF document text
- http://sugarfree-gelato.com/upload/file/kasimagitotinekipirit.pdfIn PDF document text
- http://nuitsdartistes.eu/images/file/vesudogexujaj.pdfIn PDF document text
- https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/rb87cub9peoj4vtloqjtjjlnkj/xavaxod.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_off0000f718.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF718	17196 bytes
SHA-256: `3c1507b4c25da399b3ef7efe3fb559d3742f750e50c966c4f2e4e2b5673b3899`
`font_01_sfnt_off00012348.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12348	10728 bytes
SHA-256: `b944415de4259b2e0503c2509541f111a2ee741024a4706e76697df20f7a621c`
`font_02_sfnt_off00013bc1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13BC1	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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