PDF malware analysis — malicious · d0b0223a55d3977d

MALICIOUS

PDF

83.7 KB Created: 2021-08-02 03:48:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17

MD5: 015174fb14041248995daa2b5f7c2f0c SHA-1: 8fa5d17ee790b42422b27d0c1a7c72bf55c0c721 SHA-256: d0b0223a55d3977dc9a5f786f597dc5609ca8178dcf28552c713838ca1533687

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and links to compromised CMS upload storage, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

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.
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://drafthe.ru/uplcv?utm_term=problemas+de+suma+para+2+grado PDF link annotation
- https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/50c1f2347dcca21085f0a888c8c5192d/ziwatoxuretepirumugebiv.pdfIn PDF document text
- http://misspacificus.com/clients/873634/File/vitevesenudaretuxezoliluv.pdfIn PDF document text
- https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/945df517aca63ad1e544016a7513a5c0/gokigipetigosukogufofi.pdfIn PDF document text
- http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce8a174447---zifut.pdfIn PDF document text
- http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160762d57266fd---57972833954.pdfIn PDF document text
- http://laconchigliacasevacanze.it/userfiles/files/somogoladewo.pdfIn PDF document text
- http://xz-brand.com/ckfinder/userfiles/files/87489456444.pdfIn PDF document text
- https://szaniterplaza.hu/ckfinder/userfiles/files/zowerosipenaruxadomupa.pdfIn PDF document text
- http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/bp1e355dkq9e51qfl7e48n0gf7/84392806659.pdfIn PDF document text
- http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/16070ee2b809e6---61465063418.pdfIn PDF document text
- http://bannhuaduong.net/upload/files/jidivuwanevugidugar.pdfIn PDF document text
- http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16099d65573609---dabazogonigi.pdfIn PDF document text
- https://successalpha.team/upload/files/64806035092.pdfIn PDF document text
- https://chrmglobal.com/userfiles/file/tigadixubetov.pdfIn PDF document text
- https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/8c6vbhgfpajreldeciqlv2fuve/nabafoped.pdfIn PDF document text
- http://aptchasers.com/FCKeditor/userfiles/file/tejevadopafija.pdfIn PDF document text
- https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/d866efd918bd799716a06fe075a96580/vusifazetupasitoj.pdfIn PDF document text
- https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/54b5f0081b373209818ca1cb98ddb36e/lujixatedaguwufupajanewa.pdfIn PDF document text
- http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076433f83913---nenexefinovatokirujo.pdfIn PDF document text
- https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/cb48b4661f05ba41b908df53eb056847/18122787718.pdfIn PDF document text
- https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/f9bc2bb467c267cd1ab70dcf7a6dd61f/nepuzorevufate.pdfIn PDF document text
- https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/03d2b134c7c40c6708d8dc2d8471c51d/75323612415.pdfIn PDF document text
- http://myucmas.com/userfiles/file/21234372754.pdfIn PDF document text
- https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/2f32sajevrpgflri7hgltu2kpd/bulenujojikojuf.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_off0000e187.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE187	10804 bytes
SHA-256: `4056cb219ebbfdce456dcedc08e65da1b91e966f9c0401ca6b3eb08ecf34fdb8`
`font_01_sfnt_off0000fa08.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA08	18652 bytes
SHA-256: `d462ff0d0a08a253ba0c32a3f26e0610ab3f2edc451eb4089f342b780d3e0772`
`font_02_sfnt_off000129ec.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x129EC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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