Malicious PDF — malware analysis report

Static analysis result for SHA-256 f09976a79cf0375b…

MALICIOUS

PDF

80.4 KB Created: 2021-09-08 21:30:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7738c89ccf8bcd98382eea078cc48dca SHA-1: a040227707af7406e20779d1a322a35b128b608d SHA-256: f09976a79cf0375b92ce73c2bd3858ba3f275097c8d0ff0b54f58def755827bf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://emirates-offshore.com/uploads/image/file/72063239369.pdf In PDF document text
    • https://www.totalblissbeauty.com.au/application/third_party/ckfinder/userfiles/files/87009598863.pdfIn PDF document text
    • http://jd6618.com/jd6618/file/2021-9/file/LwpCms2021_09_07_06_30_12_1879.pdfIn PDF document text
    • https://sindonis.com/userfiles/file/wifojifaxazerolurisanezi.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/bbf7d4be212aac41b0e20a7c5da3c094/muzujuvanafekekogajugemal.pdfIn PDF document text
    • http://elitakhealing.com/ckfinder/userfiles/files/menonuxipavajepa.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/46448234441.pdfIn PDF document text
    • http://kaies.net/upfiles/file/vifujoxefemopelitatux.pdfIn PDF document text
    • https://tavfelugyelet.megujuloenergiapark.hu/admin/ckfinder/userfiles/files/78724039562.pdfIn PDF document text
    • https://bitree.com/ckfinder/userfiles/files/74326413665.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/863a3a284062fde6b2212a0b051fe7b6/ripirejomoxozerijaweb.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/23530901350.pdfIn PDF document text
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/37252882362.pdfIn PDF document text
    • http://budgettranslation.hu/sites/default/files/file/dezewilubiviziz.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef8e732c9c---14558685550.pdfIn PDF document text
    • http://sartoriaventurini.com/userfiles/files/kuxatowutabilawiwako.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/161353ba1ce748---vopevinaxufonis.pdfIn PDF document text
    • http://telesson.net/_UploadFile/Images/file/80388064300.pdfIn PDF document text
    • http://wittlich-luexem.de/userfiles/file/vapiluvejalajekuwaran.pdfIn PDF document text
    • http://clinicaveterinariagoitese.it/userfiles/files/jamoxufajog.pdfIn PDF document text
    • https://www.luthier-auxerre.fr/ckfinder/userfiles/files/ladulexarotipatefane.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/7644e6100b272a1cac713714c773c2ae/73651186622.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16138c616e3fe8---motorufagob.pdfIn PDF document text
    • http://finance-bulldog.cz/UserFiles/File/xatidude.pdfIn PDF document text
    • https://listocrm.com/userfiles/files/nofikozufajerabexosu.pdfIn PDF document text
    • http://osteriadelcampanile.com/userfiles/files/21645205882.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=political+trust+and+trustworthiness+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_off0000d501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD501 10904 bytes
SHA-256: bd012d0642c191b392a9141d6cf7a36ed9363288c15ad473bcbe9286347e9f49
font_01_sfnt_off0000ee3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3F 17616 bytes
SHA-256: f823a1729b3475007ea623f195641ebf58276f27185dada2b41e45e9ab8c0d22
font_02_sfnt_off00011ba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1