Malicious PDF — malware analysis report

Static analysis result for SHA-256 805940a259190967…

MALICIOUS

PDF

92.5 KB Created: 2021-08-24 12:57:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5993619693349ecea6d077184bdfa8cb SHA-1: 115724c82dd64a66c707516bd8d066af8144009c SHA-256: 805940a259190967b19a4b1f1141ae14758a1597d25e14d12da5f475051f5a8c
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS uploads. The PDF structure and numerous external links suggest it's designed to lead users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://ikitellirezistans.com/upload/files/4006724643.pdf In PDF document text
    • https://almudenafernandez.co/ckfinder/userfiles/Files/738573107.pdfIn PDF document text
    • http://titadoorbinhduong.com/upload/files/85650913945.pdfIn PDF document text
    • http://goldenbaycruisesagent.com/userfiles/file/xudanapejul.pdfIn PDF document text
    • https://aspit.ro/imagini_ws/52809247115.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/41236741566.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4b4ed7035---30384051042.pdfIn PDF document text
    • https://ev-owners.jp/userfiles//files/webufedoxamebulopu.pdfIn PDF document text
    • http://parkwaywest1974.com/clients/861606/File/narawadejawo.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//52455161952.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/pvv3oh3s6njm1br36s7idt781j/61705155951.pdfIn PDF document text
    • https://camphacement.vn/upload/files/jumewawupemiwoz.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7a9d21deb---81552134542.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/doraninojun.pdfIn PDF document text
    • http://gmicropilotes.com/uploads/files/82190064244.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb6d5b06f02---45549304529.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0549ea0060---14513408101.pdfIn PDF document text
    • http://budohurtsa.pl/userfiles/file/2637250634.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/f5d7088e7a9f65648af009810816556e/dewexu.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/1d549b8299f971b07b88af707c5f9757/34248025641.pdfIn PDF document text
    • http://stihoplet.by/upload/editor/files/96016838218.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/01f326db22e270411764b45c56cf8f64/pivasexog.pdfIn PDF document text
    • https://surupaceanu.ro/ckfinder/userfiles/files/27379228155.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/768c35ea10f5d07b97b379513029803c/xaditusabegiwugagefiza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=the+body+songPDF 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_off00010994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10994 17032 bytes
SHA-256: bb6cb7d3fb34f7a6b13aff59794bf10e7e35078b284f3623cc8853386a4183da
font_01_sfnt_off000135f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135F6 10248 bytes
SHA-256: 53ce9a482226e39382d5efae1534b8cd10a4ba3b7db800bf8bc8740f50f46bed
font_02_sfnt_off00014cb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CB1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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