Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ac0f9d6075070a7…

MALICIOUS

PDF

85.3 KB Created: 2021-06-28 22:51:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: eb94353d527e1e43e2e74029d16e89af SHA-1: 96561ee2651fbf95b955f1a3592c1c573b1b3314 SHA-256: 7ac0f9d6075070a7d3ac7447ebaa7c5fbcc2fc4bb0d811b954927a6a09ec95ab
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed for malicious redirection. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://oniceh.ru/uplcv?utm_term=convert+pdf+to+autocad+dwg+online+free PDF link annotation
    • http://kaizousha.com/js/upload/files/71288108841.pdfIn PDF document text
    • https://bloomlight.pl/_bloom/file/28779359833.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/b16b0282e148e21303e5729912ef353d/zitexopet.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ab1de44bf---95802669097.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/bovdp54u6b7q5llojasclgb8ta/posazonipugimuw.pdfIn PDF document text
    • https://seedomoretravel.com/files/files/zevuzulinatafope.pdfIn PDF document text
    • http://parkhigh65.com/clients/4970/File/najinexinukudimanut.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/69a725883da72b95ed1d82c4ff6f2bb5/nabebojawo.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/rfl4it18fbj2q8d9r6t10lviqb/12595531244.pdfIn PDF document text
    • http://timnhanhonline.com/upload/files/79734215262.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160885d93ea2c5---11830847255.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607a10d99b6d3---96863557999.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc957cafbd---wunepejinixewumed.pdfIn PDF document text
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/3567045116.pdfIn PDF document text
    • https://studiovizia.com/webroot/img/content/files/gajejuneporusobazuzu.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/5321774835.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/tapugiga.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/e414181132698a245e0c022df8a854e5/pelunujonulosonoje.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/01ddffd6589fbe1a76e526fa9c9b0cca/rowujepusune.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/jajesokepikisilotexukis.pdfIn PDF document text
    • https://jajugroup.com/ckfinder/userfiles/files/dejaja.pdfIn PDF document text
    • https://dehayemek.net/upload/ckfinder/files/doxipi.pdfIn PDF document text
    • http://belst.by/upload/file/dalipofidinafaso.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_off0000dac6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC6 28616 bytes
SHA-256: adbf9e74f0af1bd6db95e874156add91aacd699e907e4158d12ae80d2e405e63
font_01_sfnt_off000114a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A8 10908 bytes
SHA-256: a8635f14c5833e66e8b43742eada613fccf343ea6ddc927692b745b44dbc62ee
font_02_sfnt_off00012dea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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