Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6c7c87b2c6e3dfd…

MALICIOUS

PDF

265.4 KB Created: 2021-07-28 05:41:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: b8a816bda6fb44c0bd1388211afdbcba SHA-1: daa6cf4bd01b24ea24dbc02c5a975aafa75b5b83 SHA-256: f6c7c87b2c6e3dfd42a72fd27b3e87171216853f279c45c58b30aead2a25ce4e
126 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting an attempt to host and distribute further malicious content. The primary attack pattern involves luring the user to click on these links, likely to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8479

Heuristics 5

  • 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.
  • 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://xn--mgbaf4adbs1bd2i.net/upload/ckfinder/files/xibojelelo.pdf In PDF document text
    • http://jjmcp.jp/userfiles/Image/file/98608518065.pdfIn PDF document text
    • https://supermagnum-bg.com/userfiles/file/25436709366.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160897bbba6f60---jamilegaxosadov.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/60943104762.pdfIn PDF document text
    • https://erdemlerkoleji.com/resimler/files/99582659989.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d62de94ffc7---50735877597.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16077aa7d5ad66---20437557137.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5da50d088---lepezuvopi.pdfIn PDF document text
    • http://chroscina.com/userfiles/file/nekewovibudepizuxa.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/kepotilidugowodanir.pdfIn PDF document text
    • http://cogersquest.com/clients/f/f6/f6194b381802d71b6842d6160e8859b1/File/24092336410.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b57cfda12e---dedujizavewefiwo.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba4e7c4bee---logebupajamozeb.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/16763009.pdfIn PDF document text
    • https://papersacksfactory.ae/images/bulk_images/files/38944556685.pdfIn PDF document text
    • http://xn----otbb6ahq3d.xn--p1ai/ckfinder/userfiles/files/biwexirowukewoxofa.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ffbc2d413c---jipetivurelixatulasuluma.pdfIn PDF document text
    • http://b-solutions.net/userfiles/file/75328736162.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d81ae39b80e---komawif.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b46b2b9bb8c---43294367656.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/e9c7c94f5f9de89843dad9fc4edda83d/jemexipag.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/7559302962.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16096eb1929840---setiwivozumekiz.pdfIn PDF document text
    • http://homenet-spb.ru/userfiles/file/taxidanomafekuvesexaje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=manual+de+lavarropas+eslabon+de+lujo+7kg+ewt07aPDF 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_off0003b2e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3B2E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0003cafe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3CAFE 11256 bytes
SHA-256: 459e666319cf7efb3dc83cfc4157824051ae59f9bf71b92c31753b85a6327501
font_02_sfnt_off0003e539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3E539 18268 bytes
SHA-256: 3bbf4434417a762afbb9293633cbe39f0a54abf6e7885de331330d5d3c296f7b

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