PDF malware analysis — malicious · 7fcba7edb01b9ab9

MALICIOUS

PDF

90.5 KB Created: 2021-07-23 08:48:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: d6a82a5b1d480c1c26d9563842bd3e9f SHA-1: e4470f0ddb8c3c60ac6fcab43cc0237cb14d3c54 SHA-256: 7fcba7edb01b9ab9dd24654868078ecebe59c9fd950455edf0682a17f95d9c08

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of phishing or malware distribution lures.

Machine Learning

Nyx PDF Classifier malicious score 0.9932

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://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/rk13vkk93gsq3cpn9svr6le70h/rasijopaxamedogelu.pdf In PDF document text
- http://aire-limpio.com/img/editor/file/sesopoxaxuzemumolagufezax.pdfIn PDF document text
- http://matstravel.ru/userfiles/file/96902428354.pdfIn PDF document text
- https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/bb4d6e43c16b34b6854ac92dabc26bce/52708220378.pdfIn PDF document text
- http://constantemail.com/userfiles/file/1624465295lilizajemikenekedu.pdfIn PDF document text
- https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607966b199c0e.pdfIn PDF document text
- http://mastersequipments.com/ckfinder/userfiles/files/37166949909.pdfIn PDF document text
- http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/be249b944da009d102d5a3705d857316/fitixojesu.pdfIn PDF document text
- https://afayl.com/userfiles/file/69283625656.pdfIn PDF document text
- https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/e824090a65f864165a85ead57a205747/6379994668.pdfIn PDF document text
- https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/70bec26610a5e43b78b80eda9ddb3598/lisop.pdfIn PDF document text
- https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f8de3ec23---vemunober.pdfIn PDF document text
- https://iphonerepairservice.nl/app/webroot/files/userfiles/files/zalisapi.pdfIn PDF document text
- http://juha.be/_files/file/jinurazakajiwaret.pdfIn PDF document text
- http://mygotour.com/FileData/ckfinder/files/20210528_AA58399E0982B661.pdfIn PDF document text
- https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607bca83895a0---vifuwupadogo.pdfIn PDF document text
- http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b259c483340---tidakekitojebazagode.pdfIn PDF document text
- http://fkhd.cz/data/img/pogotanubozepukej.pdfIn PDF document text
- https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/oa617br52ct0rnndfo2g9rigkm/dudixisifire.pdfIn PDF document text
- http://accessprecision.com/userfiles/file/2163738052.pdfIn PDF document text
- https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/tbvvjbd3h330q4kucfs6dl2b2n/17081465649.pdfIn PDF document text
- http://xn----7sbabjkhbzbqti4a3apfmdd2s4b.xn--p1ai/ckfinder/userfiles/files/234332500.pdfIn PDF document text
- http://amon-syotengai.com/userfiles/file/mejarilirudowekipug.pdfIn PDF document text
- https://prtl.pl/userfiles/file/56182664428.pdfIn PDF document text
- http://clair-environnement.eu/catalogue_dynamique/file/26387739096.pdfIn PDF document text
- http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d23c2e5ec6a---38006528503.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=monster+squad+wolfman%27s+got+nardsPDF 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_off0000f996.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF996	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000111ad.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x111AD	10964 bytes
SHA-256: `fb976fc5577c0b6c601c8b4030595262b80111bf71bb49b07e355d5aa1f5794f`
`font_02_sfnt_off00012ab9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12AB9	17836 bytes
SHA-256: `76ef876950d8317aedbc86be3924124ad91f0623e80d65e2d9f108f6f2f4d2b7`

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