Malicious PDF — malware analysis report

Static analysis result for SHA-256 1912172d34e6bb27…

MALICIOUS

PDF

81.6 KB Created: 2021-09-07 10:22:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d486c182d4b42d7769d032267e07f987 SHA-1: 77fd73d9b0814e7b6514bbdafa0d6eb1e1cd2fb1 SHA-256: 1912172d34e6bb2703466587ad3b5b450001bf1b380f0a62d538c43c7cd87884
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, with numerous URLs pointing to external sites, some of which are hosted on compromised WordPress installations. The embedded URLs suggest an attempt to lure users to malicious content, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • 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://imagebuzz.net/ckfinder/userfiles/files/waximojutiri.pdf In PDF document text
    • https://pabrikangka.com/contents//files/81224604026.pdfIn PDF document text
    • https://nomortiga.com/contents//files/rapixijugudesebutukanote.pdfIn PDF document text
    • https://maconlux.lu/userfiles/files/6968287486.pdfIn PDF document text
    • https://trotusgrup.ro/ckfinder/userfiles/files/xorokuvivolamemivusu.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160784b107bba2---jenavuwa.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160d2607a6ced1---87308977388.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/20210819/210819024133607945r2vk3uvcgjtp.pdfIn PDF document text
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609631ee2bf1a---25846694735.pdfIn PDF document text
    • http://www.childofafrica.org/media/userfiles/file/jikadujilajonaronan.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16098652eb0487---koses.pdfIn PDF document text
    • http://varosom.hu/userfiles/files/27510246773.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/c647ec967ce119dc332c5e69037e402c/6812677532.pdfIn PDF document text
    • http://1mosref.ru/ckfinder/userfiles/files/87915856238.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/3hi164v8a3n5sej54mo11f8i0d/rometenatik.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607886c5a39b3---rikufofikevesi.pdfIn PDF document text
    • http://hhoasis.org/app/webroot/img/fck/file/37458130218.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210526115153.pdfIn PDF document text
    • https://paradigma.bg/uf/file/ditevomojaboxogududak.pdfIn PDF document text
    • https://hargagila.com/uploads/image/files/72859838433.pdfIn PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/160837c584e489---koladamuta.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16135309040033---24518772860.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fbc118ed3f---91060921965.pdfIn PDF document text
    • http://iiiemjobs.com/FCK_Editor_Images/files/bigifom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=ferien+berlin+2021+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_off0000d9a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B9 10352 bytes
SHA-256: 970413e4969630a566e3c4acf1e5d1e2850d3bb681094531541192b0188d4e5a
font_02_sfnt_off000108e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E9 18812 bytes
SHA-256: e04b7c72cb9c874e8c1649a2d0d0c679d6e5ba1c836168845f8954884c8304b6

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