Malicious PDF — malware analysis report

Static analysis result for SHA-256 93f9a825e5a33d1a…

MALICIOUS

PDF

73.6 KB Created: 2021-09-03 08:10:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 58cfee28830019686e004e3001a1114a SHA-1: c6ddb900345c120040bd1bc7451d03c40ee78800 SHA-256: 93f9a825e5a33d1aab3adc0b3b9f6e7e156a393eac429e9f60ae9a2531694017
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm directing users to multiple external URLs, some hosted on compromised WordPress sites or disposable domains, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or delivering a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • 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.
  • 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://logistra.fr/ressource/site-image/files/66706975931.pdf In PDF document text
    • https://hunglivet.com/uploads//files/202108130521558192.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/81212108976.pdfIn PDF document text
    • http://sanruou.com/app/webroot/uploads/files/61999232749.pdfIn PDF document text
    • https://mgogs.com/mgfiles/file/lefemumiwodewawupum.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607b82128b345---50184261852.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/sizaninoradaxuzozokupijur.pdfIn PDF document text
    • http://gartenbaukoeln.de/uploads/files/mejofiv.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b5316577d56---74117331754.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/libefigi.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/hgjv6v5q35fvrjlqh4egafl6u3/95440905329.pdfIn PDF document text
    • http://artgraf24.pl/userfiles/file/86574675859.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/cac7d73e09cd3a3b22ae382176d6265b/todekobunoniruruj.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/23501261823.pdfIn PDF document text
    • https://yuss.it/file/15772989409.pdfIn PDF document text
    • http://xn--3bsx3iw22bmot.com/filespath/files/20210901033536.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608a48cfc66c2---lunosekedal.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf27e9702e---jixebisusoxegubinafubuge.pdfIn PDF document text
    • https://traffictkt.com/viking1/uploads/files/62824624499.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/417a34df0801ad5ea6aa31f3fa75ae6e/wodoniroraxakonip.pdfIn PDF document text
    • http://joelcsimonesq.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/33379367621.pdfIn PDF document text
    • http://www.haztartasigepszakuzlet.hu/pics/file/95320743841.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/pafamilozo.pdfIn PDF document text
    • https://tekstilkentrehber.com/upload/ckfinder/files/49651929251.pdfIn PDF document text
    • http://moto-bike.pl/userfiles/file/basogexixasixiwa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=que+es+outsourcing+en+administracion+pdfPDF 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_off0000bd2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD2A 11076 bytes
SHA-256: d1baceaa9dd7971ba70cae461f016eddef2f76f37572435fb94040b25a7d9fe9
font_01_sfnt_off0000d6e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF8 16756 bytes
SHA-256: 217c8229910526edd8198a89ce097659b4e817f1c212fe121202cba856312573