PDF malware analysis — malicious · ed9bae660f551a0e

MALICIOUS

PDF

82.0 KB Created: 2021-08-09 23:46:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 17283d59cca9f3b5835a142b7d623f53 SHA-1: 1ce2399fea449e2bffbcd81d5ae4fea8564c9973 SHA-256: ed9bae660f551a0e8bed35da95ad7bd6cf4caecf77d227037d7d1f7afb7aca46

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised WordPress sites, suggesting an attempt to host malicious content or redirect users to phishing pages. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9846

Heuristics 7

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://nomylo.ru/uplcv?utm_term=brazil+mix+all+mp3+song+download+mr+jatt PDF link annotation
- https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/fad3d197cf93eb4abbcd229d0041a2c8/93743049479.pdfIn PDF document text
- https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/7as9f9bgrtr4ptkf6nb99bpgf6/23641220167.pdfIn PDF document text
- http://www.museopizarra.com/ckfinder/userfiles/files/dezazulo.pdfIn PDF document text
- https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/c492828629f79d7e6fcc8aef68e157d1/47175714240.pdfIn PDF document text
- https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/b2026afec703ae184ccb962a19739a64/gutaketoroledalobededo.pdfIn PDF document text
- https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/1gkl70tnnloh5geuq0kbgbb56d/21005813000.pdfIn PDF document text
- https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/495c3ff4a4ce93e3d5015d3c0970f607/sinotunoxapo.pdfIn PDF document text
- http://greenlivinggarden.com/htdocs/UserFiles/file/lepokotato.pdfIn PDF document text
- http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16103e5b77c6ba---dapozozigotenobowi.pdfIn PDF document text
- http://cw-cut.com/uploads/file/muzarevazim.pdfIn PDF document text
- http://a-kamen.com/userfiles/file/rivenujerumolutodefezutew.pdfIn PDF document text
- http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bde30dbe14d---6321934114.pdfIn PDF document text
- https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/ihn1ua0qp7et1mbvqrjr942mn1/ranefagonefiwirubow.pdfIn PDF document text
- http://candientushinko.com/images/file/92692675264.pdfIn PDF document text
- http://lutechmed.com/Images_upload/files/74094458830.pdfIn PDF document text
- https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/7jcijbfp4ll7egn6q27b3lvttk/28607012879.pdfIn PDF document text
- http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/ff5c0cdb45bad67059ef25b5f915e5f5/67421357685.pdfIn PDF document text
- https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608b39453a848---mipusujofanaker.pdfIn PDF document text
- http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607886d77d50a---peditakepipi.pdfIn PDF document text
- https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/23cf96967a83bad25c0780db2b1d6c7c/burasegasisukege.pdfIn PDF document text
- http://commune-bourre.com/userfiles/file/jilumoge.pdfIn PDF document text
- https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160820c4e7364e---44258751982.pdfIn PDF document text
- https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/pg99dhoh3h1csnq5a833mrnta3/13880440852.pdfIn PDF document text
- http://www.grupoaccs.net/ckfinder/userfiles/files/84839741628.pdfIn PDF document text
- http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/egjb4s0jose41pnanq7bek2r87/67035075084.pdfIn PDF document text
- http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a56c8fe0665---81623199632.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_off0000d7c8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD7C8	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000efda.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFDA	17896 bytes
SHA-256: `3d06994c554c54d603d3241510d5699c766a79721f1397080c481fb71d48e664`
`font_02_sfnt_off00011e8e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11E8E	11208 bytes
SHA-256: `1eaf22bb5a94fa8e63f1e2f1450f678978e0e1554dbaffad62b1c3c987e408d0`

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