PDF malware analysis — malicious · e203bb27ee68ef07

MALICIOUS

PDF

594.4 KB Created: 2021-08-01 15:47:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15

MD5: fbcfea5c7a85f1a7061267103feb1127 SHA-1: 13e280424993a27d047d046dc5a6fc80d155fc03 SHA-256: e203bb27ee68ef0775ecd26e3edbea420d10a755e0cb651202f5978bdf2d4d73

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, with one heuristic specifically identifying a link farm pointing to compromised WordPress upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the presence of numerous links to potentially compromised sites suggests an attempt to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.8326

Heuristics 5

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.
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://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/13a967dfdd202007b27ac83c372c5370/nozogedogibinedefedifufa.pdf In PDF document text
- https://coonvalleycc.com/userfiles/file/4746493199.pdfIn PDF document text
- https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075bc8ca5df8---81858714515.pdfIn PDF document text
- http://marymo.ru/uploads/files/lodizelaporedetifuroberu.pdfIn PDF document text
- http://fosterfreezesantarosa.com/uploads/files/26935049990.pdfIn PDF document text
- https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2e7866f7a---sikopazuroxolazal.pdfIn PDF document text
- http://cesishotel.lv/res/wysiwyg/file/84617864549.pdfIn PDF document text
- http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/fpls8s2cffgdjrmu2oohlkbdd3/jexabifiku.pdfIn PDF document text
- http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1610474eb04428---pajol.pdfIn PDF document text
- https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c4df1c11b---7991553064.pdfIn PDF document text
- https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/47skdiubqn7242ere97plmqvn4/bumineburezufutinib.pdfIn PDF document text
- https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c0610a03a83---31457494705.pdfIn PDF document text
- http://titadoorbinhduong.com/upload/files/fevesotabimo.pdfIn PDF document text
- https://best-label.com/upload/files/50115329046.pdfIn PDF document text
- http://pincailight.com/zk/UploadFile/file/2021073005524773499.pdfIn PDF document text
- https://abugfreemind.com/userfiles/file/kuliseluwisowi.pdfIn PDF document text
- https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/3052b198fc99dd34782b81d80ec0ec64/fevagujiwezuputi.pdfIn PDF document text
- http://wowbond.com/upload/Fckeditor/file/23934681505.pdfIn PDF document text
- http://autodilykanka.cz/cmsimple/images/file/pepefosu.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=how+to+label+a+line+segment+in+geometryPDF 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_off0008b510.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8B510	10780 bytes
SHA-256: `002005a794006726c842750a37f68ca5789ed67158dcd1dbedbdcfb9b3d36199`
`font_01_sfnt_off0008cded.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8CDED	17868 bytes
SHA-256: `ad6df7b1e65ef15088426937cbacd75082ef932fe212a1c350553c74db22d184`
`font_02_sfnt_off0008e893.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8E893	19820 bytes
SHA-256: `dbf3023420702cda7e39f872db8752a605d730d9ceb3aafa703d12df314b9f18`
`font_03_sfnt_off00091db3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x91DB3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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