Malicious PDF — malware analysis report

Static analysis result for SHA-256 94d7560c1ff75154…

MALICIOUS

PDF

74.1 KB Created: 2021-09-20 18:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6c88aea360c00e711b83afd799bd65de SHA-1: baa60e6597a07a78f6246c82cf9b4216388fcc6c SHA-256: 94d7560c1ff751549fa4b6405d7a773cf61098c779786aa6b0ab9710a5eb3d6f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress uploads and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the download or execution of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. 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://balajihighfields.in/userfiles/file/woloxe.pdf In PDF document text
    • http://playbabydoll.com/userfiles/file/83488361304.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613fccae1555e---winebujogepowukazubu.pdfIn PDF document text
    • https://wcfkenzi.com/ckfinder/userfiles/files/jefuja.pdfIn PDF document text
    • http://dinhvi5s.com/images/newtech/files/618870265.pdfIn PDF document text
    • https://ribaczpeter.hu/files/file/51921169063.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16135d1daa508d---podakulazomazi.pdfIn PDF document text
    • http://theorientgarden.iorderfoods.com/uploads/files/11143216513.pdfIn PDF document text
    • https://ashasuchikala.com/ckfinder/userfiles/files/gaxodesozi.pdfIn PDF document text
    • http://otworz-biuro-podrozy.pl/userfiles/file/jekotoguna.pdfIn PDF document text
    • http://stroi-sistema.ru/img/10998793757.pdfIn PDF document text
    • https://protradingindia.net/userfiles/file/3450055312.pdfIn PDF document text
    • http://studioesflores.pl/obrazy/file/76551356923.pdfIn PDF document text
    • http://strandedtattoo.info/file/5479827124.pdfIn PDF document text
    • http://billagelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fukewoxuwesupaluzawanog.pdfIn PDF document text
    • http://tomei4x4.jp/js/upload/files/12751390855.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141e51e960a7---zejevirawipufemuzukedetag.pdfIn PDF document text
    • https://rmduncanrealty.com/userfiles/files/19200515759.pdfIn PDF document text
    • https://ehotelgateway.com/bot/ckfinder/uf/files/85331966626.pdfIn PDF document text
    • https://atrax.eu/userfiles/file/79975055887.pdfIn PDF document text
    • https://bouveau-consulting.com/userfiles/file/tisomelesibapi.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16144d1992fec7---junirewu.pdfIn PDF document text
    • https://aiwcecckolkata.org/FCKeditor/file/49153522217.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/83155447976.pdfIn PDF document text
    • http://chupanhnoithat.vn/upload/files/22474040503.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=subway+surfers+pc+game+download+windows+10PDF 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.

FilenameKindSourceSize
font_00_sfnt_off0000be6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE6D 11552 bytes
SHA-256: 6e01afb6728295a43822809b1a773bfccc52a474992d85965a84e489bd2703f0
font_01_sfnt_off0000d972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD972 15896 bytes
SHA-256: 30d83a09bd7409539a3251d3b9bbc1e01cdea73cc7a01ee948e53a84e0c1efe0
font_02_sfnt_off000101f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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