PDF malware analysis — malicious · 4bfaa4fbdc90f18c

MALICIOUS

PDF

103.4 KB Created: 2021-07-07 03:31:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15

MD5: 8bf5f8e2e7e47367686360d0e2e507b3 SHA-1: 0af4863a51d34ed2ffd7915e6242cf579aa9d8d8 SHA-256: 4bfaa4fbdc90f18cd1ba0e8ef32bd8c96dac79ddfef93753fd83644d18e88ffe

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a social engineering attack (ClickFix). The document body is heavily obfuscated, but the heuristics indicate it contains a link farm and potentially attempts to trick the user into executing a command. The presence of embedded URLs and the nature of the heuristics suggest the document is designed to lead the user to download and execute a malicious payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9896

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
ClickFix social engineering attack high SE_CLICKFIX

Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
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://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bc9ac5ae56f---wokat.pdf In PDF document text
- http://wignaccent.com/FCKeditor_2.6.3/userimages/file/20210615084402.pdfIn PDF document text
- http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/bc66gostj3vrgn9qra28u18bk1/lubupulatowafimatele.pdfIn PDF document text
- http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b65482068a0---34702141850.pdfIn PDF document text
- https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/9662e93724f8d6aaa637b97a8ffd0567/68110961783.pdfIn PDF document text
- http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160ae975bdf487---fasapenotavegejot.pdfIn PDF document text
- https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a891911d9e1---37466177209.pdfIn PDF document text
- https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/ci0fobkhm87j1ag9cnf3bp9ss3/66547315690.pdfIn PDF document text
- http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc3acb8804---48877532211.pdfIn PDF document text
- https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/090976789c7101d39b235fb50615f06e/seridufapudigowarenefidov.pdfIn PDF document text
- https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/43h5b1v8qs7bo0v4aadqbus4qm/wilofoxaminum.pdfIn PDF document text
- https://www.axelendinggroup.com/wp-content/plugins/super-forms/uploads/php/files/45e21330e28c2faafae4306918be7f8f/suwixo.pdfIn PDF document text
- https://poolpoint.be/uploads/file/91887794785.pdfIn PDF document text
- http://arablift.net/userfiles/file/jufuvabojetiruk.pdfIn PDF document text
- https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/avjpald7ptrcacurnijr6r5f54/buvegogogomojoludafabilup.pdfIn PDF document text
- https://creteotels.gr/FCKeditor/userimages/file/tirawifo.pdfIn PDF document text
- http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16082369450897---99634523386.pdfIn PDF document text
- https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d0d911bcb4---15789873166.pdfIn PDF document text
- https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/18sj7rmf9v6m0dbvoqdtl97k1f/kekiravuro.pdfIn PDF document text
- https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/897fc64f9ca5be74632e80a681be2d8e/23890531155.pdfIn PDF document text
- http://hotelclinton.it/userfiles/files/8506065559.pdfIn PDF document text
- https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077bf9f45d21---35548104424.pdfIn PDF document text
- https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b4048bba559---24153941238.pdfIn PDF document text
- https://premium-house.uz/images/file/1328173101.pdfIn PDF document text
- https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609b583444fd9---tabivaj.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=idm+has+been+registered+with+counterfeit+serial+numberPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f241.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF241	11200 bytes
SHA-256: `94b9d84844b7859a32e862b2fb9ae52fb75bb9b2ec624460cf7ad11e630a4afb`
`font_01_sfnt_off00010c1a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10C1A	17272 bytes
SHA-256: `26f95a76b24e866c1db0c7ad63292fbc42ab5f4ab0ed16845096ad7d92029c36`
`font_02_sfnt_off000139a7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x139A7	20800 bytes
SHA-256: `6b9cad53e3d0b0893bc479ff9151824d11c5cf262154a8a8971af423d9ae33cc`
`font_03_sfnt_off00017546.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17546	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

Open this report in the interactive analyzer, or submit your own file for analysis.