Malicious PDF — malware analysis report

Static analysis result for SHA-256 9859f8c66094b029…

MALICIOUS

PDF

87.6 KB Created: 2021-09-08 18:06:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0c8fa6df568369bfd61706cb9178f2e5 SHA-1: 8c12715260304a636d944ef67cfe637f07fce5f0 SHA-256: 9859f8c66094b02937782fd4c669c1049e7ae6ad6bfbdf4520ebf1bdde1e3d45
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high ML score and ClamAV detection. It functions as a link farm, containing numerous URLs pointing to various domains, some of which appear to be hosted on compromised CMS uploads or disposable hosting. The primary purpose seems to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://palami.by/images/file/83522950613.pdf In PDF document text
    • http://tuclubcr.com/campannas/file/44598324592.pdfIn PDF document text
    • https://stcc-sa.com/motakamel/Ups/files/moxonajaxakuzevofuz.pdfIn PDF document text
    • https://verredistri.fr/xmedia/file/61347933156.pdfIn PDF document text
    • https://hamayeshniroo.com/shop/file/42806870135.pdfIn PDF document text
    • http://carbontuning.ru/file/93367336291.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/161346089d503c---41335276406.pdfIn PDF document text
    • http://studiofapas.it/userfiles/files/wenirukib.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/9a512f008cf7177eed5001515e5d0927/pazuxijifavoribe.pdfIn PDF document text
    • https://oriontradecom.com/ckfinder/userfiles/files/vewetamenizixuzo.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/81570475202.pdfIn PDF document text
    • http://homeopathyhongkong.cn/files/fepeme.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/61449671191.pdfIn PDF document text
    • http://morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136c564cbdd8---sopix.pdfIn PDF document text
    • http://atletika-pardubice.cz/files/file/22634907829.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/ec622a6dc5870eb3da9dee7b5a13d127/21937954869.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161306aabe02d5---doretovomef.pdfIn PDF document text
    • http://hoanggiaphatstone.com/upload/files/lukidelar.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131b7aa01014---28333430843.pdfIn PDF document text
    • http://makassitools.com/userfiles/file///polojaruke.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/jedivonokekolenovo.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16132568520810---2059499440.pdfIn PDF document text
    • http://servmed.net/userfiles/file/gagedumebej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=metaphor+examples+and+meaning+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_off0000f01c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01C 11040 bytes
SHA-256: 0819df171bfa7ad38174739591db62084064f97556639ffcf7ca2d276cd80530
font_01_sfnt_off00010967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10967 18188 bytes
SHA-256: db9308665d25fceff8e848543fa15fd369e2942e0f6b0018fb6faeae3d7c9985
font_02_sfnt_off0001386f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1386F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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