Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee718343ee82ef62…

MALICIOUS

PDF

73.0 KB Created: 2021-09-27 02:06:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 201c75089e6a201fbc41fa0d512c3f34 SHA-1: 691d615d62b707b25d5a51adcfe01050bb32f4ce SHA-256: ee718343ee82ef621c742198ab01f97b5dc1a9a95fa4c56a4044f08ebe40bcf6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external links, many of which point to compromised WordPress sites or disposable hosting, indicating a likely phishing or malicious redirection campaign. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

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://wwa.bdbabymart.com/app/webroot/ckfinder/userfiles/files/95375766695.pdf In PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/ea3a10506a7576cdced80f15c57b6e31/44361558008.pdfIn PDF document text
    • https://vargyasnekonyveles.hu/kepek/other/file/87429973474.pdfIn PDF document text
    • http://offerparts.com/upload/files/80303729098.pdfIn PDF document text
    • https://tuinvandecruys.be/file/wolopuzuzefab.pdfIn PDF document text
    • http://askaudit.ru/price/12101803509.pdfIn PDF document text
    • http://insfilings.com/skyzone_classic/upload/files/seginunobotegos.pdfIn PDF document text
    • http://sgrappresentanze.eu/userfiles/files/jivinadixepojikivadirejud.pdfIn PDF document text
    • http://eggtesting.com/admin/uploads/file/38919035822.pdfIn PDF document text
    • https://www.rosebankprimary.co.za/inc/ckfinder/userfiles/files/79356423227.pdfIn PDF document text
    • https://www.colegiodomus.com.br/js/ckfinder/userfiles/files/68711896452.pdfIn PDF document text
    • https://iva-vietnam.com/userfiles/file/pakixefepajiravebovuvarup.pdfIn PDF document text
    • http://servmed.net/userfiles/file/tafafiwisozorurigoge.pdfIn PDF document text
    • http://xn----7sbqwxdbhblh2h.xn--p1ai/data/file/gesomiwowivujupalopupi.pdfIn PDF document text
    • http://artiguardia.pl/userfiles/file/12148858508.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/2a8908aae6fc6c3477d3e1d0b1aced37/rozorowisivoxadojapetaxok.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/vetugevawafavokobi.pdfIn PDF document text
    • http://aiaato.com/FileData/ckfinder/files/20210917_D01126E2F50B21E6.pdfIn PDF document text
    • https://nibrasimansch.com/userfiles/files/biwupofo.pdfIn PDF document text
    • http://volker-issmer.de/userfiles/file/98543834963.pdfIn PDF document text
    • https://universitecentrale.net/uploads/FCK_files/file/lijivabekotujeko.pdfIn PDF document text
    • http://seteo-dechets.com/images/file/sinix.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16150038bc8b13---60824199050.pdfIn PDF document text
    • http://eegbiofeedback-leszno.pl/userfiles/file/50937465972.pdfIn PDF document text
    • http://inphilong.com/upload/files/zizekegiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=comment+avoir+l+app+store+sur+androidPDF 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_off0000b7db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7DB 10748 bytes
SHA-256: 44f16218985057476aa370da455a65a834fe591a233e022b5e4aa54e32fb8252
font_01_sfnt_off0000d093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD093 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e8a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A5 17912 bytes
SHA-256: ac6e9e1e0df616bf036c06654a2d3c9478659a4e72b547d6d24cbc1869bcace0