PDF malware analysis — malicious · 1c99349533126c1a

MALICIOUS

PDF

85.6 KB Created: 2021-09-19 01:32:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: b642f06b70d71345de05ec7f0224f2a6 SHA-1: 57a1d4d3ae136e276f3d9a64d4b33258a2589e52 SHA-256: 1c99349533126c1a302bef6b19c8fd3c3f469e9063cb8902fc63f7008d5f5862

134 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious actions. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the numerous unknown URLs suggest the document is part of a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9976

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
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.
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16141ec554bf13---98317273175.pdf In PDF document text
- http://tid.vn/upload/files/kejiradufuse.pdfIn PDF document text
- http://poultech.net/d/files/74811741660.pdfIn PDF document text
- https://fullprotec.com/ckfinder/userfiles/files/84017960580.pdfIn PDF document text
- http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16134ea7858520---4741322869.pdfIn PDF document text
- https://www.weboonline.com/ckfinder/userfiles/files/sipuxatebawofibugojo.pdfIn PDF document text
- http://confetti-seasons.ru/upload/files/97299807323.pdfIn PDF document text
- https://www.prieur-equipement.com/ckfinder/userfiles/files/79992740302.pdfIn PDF document text
- http://jacsonsfurniture.com/userfiles/file/tutodurejonovujuvoxusak.pdfIn PDF document text
- http://tecksco.com/upload/files/29086573924.pdfIn PDF document text
- http://enjoy.sk/editor_uploads/system/files/23310667801.pdfIn PDF document text
- http://files.ibiza-ferien.de/file/35430114220.pdfIn PDF document text
- https://otterdisplay.com/userfiles/file/lojexivawaxibonazemoxeve.pdfIn PDF document text
- http://belstroyiz.ru/img/file/65676314944.pdfIn PDF document text
- http://ekogamma.pl/javascript/ckfinder/userfiles/files/lizetifuvuropirixe.pdfIn PDF document text
- https://thefertilizergranulators.com/d/files/zetizelozoxajumakib.pdfIn PDF document text
- http://sangsangins.com/upload/upload/file/13635015722.pdfIn PDF document text
- https://mimpi1pusat.com/contents/files/sojuvelorivikosifavoreral.pdfIn PDF document text
- https://shaplaconsulting.com/app/webroot/ckfinder/userfiles/files/18126097219.pdfIn PDF document text
- https://inprovit.com/ckfinder/userfiles/files/81286072743.pdfIn PDF document text
- http://aroma-es.site/yamituki-n/uploads/files/gimenubexope.pdfIn PDF document text
- http://cctechlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sixesajiwiradejoma.pdfIn PDF document text
- http://gzmzwl.com/Uploadfiles/files/37953516301.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=01001+binary+to+englishPDF 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_off0000e30f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE30F	20012 bytes
SHA-256: `94f1f4176f46067c8552e0026f8391607dd5ae6d95ad66659d623d20056d4b94`
`font_01_sfnt_off0001182b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1182B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013042.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13042	10716 bytes
SHA-256: `7f319e362d770516886d7e4ff23e09f6a6c57379581a515e0b716d445269800b`

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