Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2cdda5a4344befa…

MALICIOUS

PDF

88.0 KB Created: 2021-09-01 22:28:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3fd0e15e5a70982b54d33f8f84e78b3e SHA-1: 1edaa05d0917fd0279921c9c2bbee7826c07145c SHA-256: a2cdda5a4344befa59db7c8a7b7b7edcf8546970f6380b9cb7c049683d774503
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised WordPress installations. The primary purpose appears to be directing users to potentially malicious or phishing content through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 http://npcbalkan.net/ckeditor/ckfinder/userfiles/files/2655006459.pdf In PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/mejovotipososuxo.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16129268b100f4---69273244194.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/p0bfvrk3lrug257ntpdh5att93/dareri.pdfIn PDF document text
    • http://fsgzb.com/upfolder/e/files/20210830031520.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079ba38cad44---6625681028.pdfIn PDF document text
    • http://rydelko.pl/userfiles/file/livaxovotifibon.pdfIn PDF document text
    • https://onlinendttraining.com/files/6250240740.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/gv68403hadnffga6h7lmmndqv7/reruxifoken.pdfIn PDF document text
    • http://kingsfinancialconsulting.com/userfiles/file/kumasanadifolaladim.pdfIn PDF document text
    • http://kraski-chernila.ru/resources/file/84907885107.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609846b17024a---dokivogivesezezinemu.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160746601b2e41---gemusuguxatugibuneg.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/800c043aa21dc24296e0b450b95d5097/pusomiloxamu.pdfIn PDF document text
    • http://sushinamu.com/uploads/files/xetilizemazizumabinidim.pdfIn PDF document text
    • http://thompsonhigh1980.com/clients/4/48/48b9e10b24f1ac3c627dfd5bb8c45987/File/titopikexaxivuzel.pdfIn PDF document text
    • https://altstudio.be/app/webroot/uploads/file/zuvadopejinatel.pdfIn PDF document text
    • http://korvet-sp.ru/userfiles/file/11867847019.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/kolamafofesalaronore.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/44720093463.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160d18d70f23c6---zelunuvali.pdfIn PDF document text
    • http://hopkinshigh1961.com/clients/878968/File/bibibipi.pdfIn PDF document text
    • http://mawaevents.com/uploads/file/kusajowapuko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=monthly+progress+report+in+constructionPDF 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_off0000f424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF424 10696 bytes
SHA-256: adac608fceaad2be3e8a3d40fd947da4a838a0c6ba02de8721f671250bbd08da
font_01_sfnt_off00010cb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000124c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124C4 17356 bytes
SHA-256: c60938b3b8276b93e47404b13efe5989a3ddd87a2b62e6e02801a19a1f20b33d

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