PDF malware analysis — malicious · 92027dfad65aaf3b

MALICIOUS

PDF

79.8 KB Created: 2021-09-07 11:45:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 6f9649bee119f14fd1a8eff6759e3081 SHA-1: abfaed7c6f64b8e7e7baa042ce382de370ee0670 SHA-256: 92027dfad65aaf3becc4b9d138fb6c1c5511a14e535573ba483237bd78fe5a5c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs that point to other PDF files hosted on compromised WordPress sites. The presence of these links suggests an effort to redirect users to malicious content or phishing pages.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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://philabc.ru/uplcv?utm_term=willy+wonka+pure+imagination+sheet+music+pdf PDF link annotation
- https://stpm-sa.com/userfiles/file/9017059109.pdfIn PDF document text
- https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607df73f3f5cb---86644775142.pdfIn PDF document text
- https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b6a8971c867---15787450046.pdfIn PDF document text
- https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/e4dd8f6ff1579c9ee113b7228358dee8/80763669656.pdfIn PDF document text
- https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/a2860b99803370a84777dfc827f3f6e1/77692587914.pdfIn PDF document text
- http://phongkhamthienhoa.org/images/files/kekasu.pdfIn PDF document text
- http://josephfellerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sajejotevewebewujosita.pdfIn PDF document text
- https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078797052c78---ruvewoputopodusimesoj.pdfIn PDF document text
- http://sumtinathholidays.com/admin/uploadfiles/file/bawenologelapuzebupulari.pdfIn PDF document text
- http://www.taimaobi.com/admin/ckfinder/userfiles/files/4902981224.pdfIn PDF document text
- http://festacreativita.org/userfiles/file/77208806855.pdfIn PDF document text
- http://thriftstorewebsites.net/flash/thriftstorewebsites.net/file/70930735529.pdfIn PDF document text
- https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/784739a24bac790f2998b76f6d2beb47/kakotulusuxu.pdfIn PDF document text
- http://silesiacapital.eu/data/file/52386040361.pdfIn PDF document text
- https://castilloexterior.es/ckfinder/userfiles/files/tolumu.pdfIn PDF document text
- http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/bf69c6e1f35c6be504348b38fa749d20/7345620822.pdfIn PDF document text
- http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/16073c9e90d9bd---poruj.pdfIn PDF document text
- http://fujavietnam.com/images/Download/laxavewinofazupizu.pdfIn PDF document text
- http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16074121a8fba9---53684571568.pdfIn PDF document text
- http://wieswioska.pl/userfiles/file/joladanetamapuvetizoz.pdfIn PDF document text
- http://abwlanham.com/uploads/files/xetujefukepunibasuporesib.pdfIn PDF document text
- https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c7e9d8486---74399052433.pdfIn PDF document text
- http://magicfood-cn.com/files/20210812035937.pdfIn PDF document text
- https://webmenuplus.com/images/file/4434640416.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_off0000cddc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCDDC	18520 bytes
SHA-256: `11f5fb779e8b27a6af3d4c963fbb571dc25736442a7a2f7fe8eec3363cc2f5bc`
`font_01_sfnt_off0000fe67.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE67	11452 bytes
SHA-256: `06237d18eedd69c58542e0baee2230315f266b80d0ad16a818b274934438e52e`
`font_02_sfnt_off00011926.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11926	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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