Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab61f4df2e7a734f…

MALICIOUS

PDF

71.5 KB Created: 2021-09-27 18:37:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: fab6002077b8492b31c3be0b3768e592 SHA-1: bc3842dcec014d530b432c0fcd88355054be3963 SHA-256: ab61f4df2e7a734f109f8932d38540fe4a4a79259f6a28a2d633b55454429c99
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file identified as malicious by ClamAV and an ML classifier. It contains embedded JavaScript, which is a common technique for executing malicious code within PDFs. The document also features numerous external links, some pointing to compromised CMS upload storage, suggesting an attempt to redirect users to malicious or phishing sites. The presence of embedded JavaScript and external links indicates a multi-stage attack, likely involving the download of further payloads or redirection to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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 http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a9c381be69---72704552309.pdf In PDF document text
    • http://www.520amis.com/upload/files/76258919632.pdfIn PDF document text
    • http://abovomedia.hu/_user/file/volaxabibaresidexarixero.pdfIn PDF document text
    • http://pekingtogo.com/uploads/files/7411934116.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/16147bf299617b---degetanovazufenezekexat.pdfIn PDF document text
    • https://sklepbonus.pl/userfiles/file/87525347615.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/newimekunesawopibo.pdfIn PDF document text
    • http://gajagotour.com/UserFiles/file/84879385146.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/79588246731.pdfIn PDF document text
    • https://5703n1n6999-6a55.com/contents/files/62215809039.pdfIn PDF document text
    • http://doggystylzgrooming.com/admin/photos/file/zefevaduvotakisuv.pdfIn PDF document text
    • https://olterus.org/contents/files/jomoxavaramamabu.pdfIn PDF document text
    • http://friend5190.xyz/js/ckfinder/userfiles/files/xanukajusejonufoxo.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/161422c69a8e4e---wosefonofokusisusokisege.pdfIn PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/14662429018.pdfIn PDF document text
    • https://fishboat.hr/files/69918313178.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f9bc986e07---lefaroruzasesaletine.pdfIn PDF document text
    • http://studioturina.com/userfiles/files/fepafoluselajad.pdfIn PDF document text
    • https://pioneerlift.com/upfiles/editor/files/xebunimebupubowuzesivabab.pdfIn PDF document text
    • http://vivaibonomo.it/userfiles/files/sabuge.pdfIn PDF document text
    • http://bluelakehomestay.com/uploads/image/files/piradabikovuxikagewi.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/a74a3ec3fcb94f99bf57cca607bbf412/91626752308.pdfIn PDF document text
    • http://k9careclinic.in/ckeditor/ckfinder/userfiles/files/12740728062.pdfIn PDF document text
    • http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/21767348510.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=download+unseen+messengerPDF link annotation
    • https://easyown.ddproperty.com/datas/files/fijupafejax.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.

FilenameKindSourceSize
font_00_sfnt_off0000b6ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cf01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF01 10588 bytes
SHA-256: 527b9bae769db21d82603c2ff3569fbaa9760c5d2a2cf9a48de1655fe3193571
font_02_sfnt_off0000e6fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FD 16308 bytes
SHA-256: 1d9a9bf99f97bd7fe94a594dac825fe6157f4a55f535725618bfff15403a6f94

Open this report in the interactive analyzer, or submit your own file for analysis.