PDF malware analysis — malicious · 2ed011d9019df05a

MALICIOUS

PDF

109.9 KB Created: 2021-08-31 20:14:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: aa13a1bd7f9f92eaaee4ba0b5754caf0 SHA-1: 9449ee1d3935840c4f62c195826c18c57c83a655 SHA-256: 2ed011d9019df05ad031b8fae4f25ffc9dbefde75e782a684c739179f6ac29a7

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The file contains numerous links, many pointing to compromised CMS upload directories, suggesting it functions as a link farm. These links likely serve to redirect users to phishing sites or download further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9875

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 http://meyergarden.com/ckfinder/userfiles/files/61400300006.pdf In PDF document text
- http://banquat.com/userfiles/files/daledividonumesifupaxuku.pdfIn PDF document text
- https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/ed11931775dcadb19fd1fbeebc8f4383/54315292412.pdfIn PDF document text
- https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a26d932cdb---81415961708.pdfIn PDF document text
- https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/e5eed2686453df5903cf15a23be716c7/kaponupupexuvisatusa.pdfIn PDF document text
- https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5d79172ae---38871596283.pdfIn PDF document text
- https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16121a5a7600ef---21260974345.pdfIn PDF document text
- https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608549ffa3050---nuxenazovuvodixizopugowu.pdfIn PDF document text
- https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/28876b68e92942a0c7e5f0967fe7b3a9/rininezumuritid.pdfIn PDF document text
- http://lnianemarzenie.pl/userfiles/file/81897459999.pdfIn PDF document text
- http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa13f58ea7---14184019107.pdfIn PDF document text
- https://ajwatravel.com/wheelmarine/userfiles/file/23655276453.pdfIn PDF document text
- https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0ba4a550e---midupogawuxikalobarawuti.pdfIn PDF document text
- http://outspokenholland.com/userfiles/fckFile/20210608163159.pdfIn PDF document text
- https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/cdefc7cbdcd02bd3965b119fb88b382b/tarozururoxeduwawizi.pdfIn PDF document text
- https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a407a0c641f---6602771154.pdfIn PDF document text
- http://xn--9w3b11kh5l.com/ckupload/files/tagotigizuwobunitisa.pdfIn PDF document text
- http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073999e1d4f8---89858124035.pdfIn PDF document text
- https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/ds5qd7g6tk9blg0uac91mifemq/54732190261.pdfIn PDF document text
- https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3c32b6244---welemamogeluvezizunefad.pdfIn PDF document text
- http://kpdb.org/userfiles/files/zoxetin.pdfIn PDF document text
- http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1611ad4462da36---7010910311.pdfIn PDF document text
- http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1162910c8---60652607112.pdfIn PDF document text
- http://mrcookie.tw/upload/editor/file/032358294308.pdfIn PDF document text
- http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ccc11ff0f---42823173457.pdfIn PDF document text
- http://fairmonteast1975.com/clients/0/01/014dde3c838f86fef2ac1d31a86c415b/File/xilabatutevofiwe.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=academic+competence+pdfPDF link annotation
- 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_off00014878.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14878	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001608a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1608A	18680 bytes
SHA-256: `38f40d29ded29842e0617c1ef094ab1d251e15d84f70393b8c48fff8df68a78e`
`font_02_sfnt_off000190eb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x190EB	10448 bytes
SHA-256: `89aac6208d83470443b74c64ebd635aac2f4d25ba5073891473f625165a6c222`

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