PDF malware analysis — malicious · 86986e630a02907d

MALICIOUS

PDF

71.9 KB Created: 2021-09-25 23:48:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 58d62cbcc0fc37dc1561a66d6fb78604 SHA-1: dc3f325866aa47132fe12f0aa2fd5974a2e58e65 SHA-256: 86986e630a02907d7ea86d40ce56adfc78efa574f979981bd8b8025b7e2341a6

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress upload directories, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent. The file's structure and link farm nature are consistent with a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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://biomehl.com/images/content/files/49148078323.pdf In PDF document text
- http://www.greddy.com/admin/common/ckfinder/userfiles/File/tapukafedomodatadigewa.pdfIn PDF document text
- http://spc1991.com/ckfinder/userfiles/files/52877001613.pdfIn PDF document text
- https://olterus.net/contents/files/befipazub.pdfIn PDF document text
- https://papiratisk.cz/soubory/55079590690.pdfIn PDF document text
- http://ayrh.internet-match.com/upload/files/pewak.pdfIn PDF document text
- https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/50b708956a36bd8e20e2d403d87b0b37/52449970836.pdfIn PDF document text
- http://pecsikult.hu/files/file/tuvofumilabojev.pdfIn PDF document text
- https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/b980f1091a6050b60d386be7f0fdcd86/nevutep.pdfIn PDF document text
- https://rajatotogroup1.com/contents/files/28005065732.pdfIn PDF document text
- http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b5256bf8e0---jajosububitafoneputila.pdfIn PDF document text
- https://consultemergingmarkets.cubsindia.com/files/91553617845.pdfIn PDF document text
- https://parvazyab.com/basefile/api203/files/fufizejuk.pdfIn PDF document text
- https://bem-sa.com/img/file/49460118522.pdfIn PDF document text
- https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/e182f43a4fb0dec581f1da76ffebbbe6/93698601583.pdfIn PDF document text
- http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614637705620c---zisubodimut.pdfIn PDF document text
- http://lifeisartfoundation.org/sites/default/files/images/userfiles/file/lekimeregow.pdfIn PDF document text
- http://rund.cz/UserFiles/File/jejuruvadasab.pdfIn PDF document text
- http://ssaisarang.com/ckfinder/userfiles/files/74266473797.pdfIn PDF document text
- http://medica-eg.com/userfiles/file/pusifu.pdfIn PDF document text
- https://www.corpeverest.com/ckfinder/userfiles/files/47381352141.pdfIn PDF document text
- https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/vsh74d47qj5onc4flu0l3j2e0f/42073571364.pdfIn PDF document text
- http://brlairport.com/images/file/lavusobinuzajireg.pdfIn PDF document text
- http://vrieshorst.nl/images/uploads/file/buzozukonu.pdfIn PDF document text
- http://koreabulk.net/userData/board/file/99065634208.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=root+android+linuxPDF 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_off0000b5c2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB5C2	17660 bytes
SHA-256: `ce674952d1e39113377fcf17b242969d65fe564cf158dd2040ec9545c9496746`
`font_01_sfnt_off0000e332.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE332	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000fb49.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB49	10188 bytes
SHA-256: `4dc67d64b7d69296b74f24879b812f33231960f74378d7bbfee98447800446c9`

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