Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e2174eeaa433b62…

MALICIOUS

PDF

85.4 KB Created: 2021-08-09 22:05:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 54b7210ef7c8c2ef75f90b0d452cdce6 SHA-1: c2891c098b3a38cc7db55b22786aaa5958a55a53 SHA-256: 7e2174eeaa433b62b99cde5dc995b602d96d1411980c8869234d99cb204c8fb8
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting. The primary purpose appears to be directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://urbanconstructions.org/images/uploadedimages/file/21133407876.pdf In PDF document text
    • http://hondaototanan.com/upload/files/6393116288.pdfIn PDF document text
    • http://myshopgroup.com/userfiles/files/86639506568.pdfIn PDF document text
    • https://penal-garazh.ru/files/guval.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608274b4400d0---58593772945.pdfIn PDF document text
    • http://kelvista.lt/images/files/pitubujubivopekapesi.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/429bac61caca55045538bf5029453442/54709417776.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/51312490573.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/kpd7q3l6dbqcq13q7fferc2s7s/73813822552.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/59cd09b7a1602687d4544b150f27cbea/dewesigiw.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607b527f0e2ce---jenafasib.pdfIn PDF document text
    • http://yetisirkaucuk.com/firma/files/29024667877.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/jopug6qkbkpks24gl1un1u75ij/muwowir.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb4cd88aae---rikekeluninig.pdfIn PDF document text
    • http://kuhomania.ru/ckfinder/userfiles/files/57591065558.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/86619313545.pdfIn PDF document text
    • http://mprime.net/ckfinder/userfiles/files/supujarokezesemaremubifir.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/javifagiwudazafoxavonaf.pdfIn PDF document text
    • http://lamachine.nl/userfiles/file/dabelezodix.pdfIn PDF document text
    • http://dwhs79.com/clients/15834/File/gafefigirafinudizes.pdfIn PDF document text
    • http://danfilenemd.com/clients/67744/File/25243407707.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/40005033014.pdfIn PDF document text
    • http://sanga.asia/userData/board/file/18062053906.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/bapofozed.pdfIn PDF document text
    • http://buildinggodskingdom.com/webcms/file/xulifuxixitipipam.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbdf07c3f06---16292682800.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=comprobante+de+ingresos+pdf+para+becaPDF 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_off0000e578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE578 18788 bytes
SHA-256: a2163752d5020d7c0d7f37a121770e244f21ab9ad6cf6ff1ef85a12efef8af68
font_01_sfnt_off00011541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11541 11088 bytes
SHA-256: cc5fde82c95ed663ce5503e10335d3246bad9f0f0f16388ad0a8fde6c44ccca6
font_02_sfnt_off00012eb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EB1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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