PDF malware analysis — malicious · 7249eeb8408177b3

MALICIOUS

PDF

83.8 KB Created: 2021-08-16 02:02:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 281a32a2399c19db43e5ad9a488bcb36 SHA-1: cc63a7ed9ffab41f8d99d439209c12a299c234d0 SHA-256: 7249eeb8408177b3838fb87424f1acc71392862c6ab598543ff657c2e634549d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is a phishing or malware distribution vehicle. No scripts were extracted, but the structure and URL patterns are indicative of a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9912

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://garglob.ru/uplcv?utm_term=exercicios+de+conversao+de+bases+numericas PDF link annotation
- https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d334879a8---zenoniraxete.pdfIn PDF document text
- https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609966759ce29---luvimikaw.pdfIn PDF document text
- https://thefertilizergranulators.com/d/files/894512145.pdfIn PDF document text
- https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/omv6a867vmi93evg8g25k2o5ti/35667266098.pdfIn PDF document text
- https://ecoverservice.be/gallery/file/25029050274.pdfIn PDF document text
- http://botosani.ro/img/uploads/file/dagadikadeda.pdfIn PDF document text
- https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/a49bba5777d72e80d2aca81fbd98da64/39174760499.pdfIn PDF document text
- http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6005ca43f---85238749353.pdfIn PDF document text
- http://meyanko.com/userfiles/file///wofam.pdfIn PDF document text
- http://vimbark.sk/editor_uploads/files/71910027763.pdfIn PDF document text
- http://cokhihoaiduc.com/uploads/files/nofov.pdfIn PDF document text
- http://yogathoitrang.com/quangbasanpham/app/webroot/upload/image/files/44556547626.pdfIn PDF document text
- https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/fa36534449c7758ac55be7d591b5591b/57259330352.pdfIn PDF document text
- https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c166b0f4a---64343915637.pdfIn PDF document text
- https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/e89f077e17014434c36627c8ff6248fc/84489136131.pdfIn PDF document text
- http://valeneighbors.com/userimages/kowifome.pdfIn PDF document text
- http://oasis-inwaste.asia/files/file/rovapelalijodogeri.pdfIn PDF document text
- https://alkalacarservice.com/public_html/userfiles/file/47948252715.pdfIn PDF document text
- http://samtle.net/ckupload/files/21217741708.pdfIn PDF document text
- http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0087c3c06a---bikebixenadezexasexomor.pdfIn PDF document text
- http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e088fc88c7c---471649016.pdfIn PDF document text
- https://riondene.ch/img/uploads/file/96033721129.pdfIn PDF document text
- https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/6524251971f146c0a54d6109bdfef01e/mesimipidezokasivisupedur.pdfIn PDF document text
- https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/f87e208b2f51eab88daa5e442c02a628/76109899930.pdfIn PDF document text
- http://brandnewgoods.net/userfiles/file/paxorolazetepilolawomu.pdfIn PDF document text
- https://yukkumpulgroup2.com/contents//files/49899579261.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_off0000e062.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE062	18580 bytes
SHA-256: `25153d0f893a9dbf31ce984050579c56f8587c6624b44e862763707486411dff`
`font_01_sfnt_off00010e88.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E88	10776 bytes
SHA-256: `21ec4cd14de61318e4d0ba396de20e4e412343ed79f977702b388229917723ee`
`font_02_sfnt_off00012760.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12760	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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