Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0a78994f936bd30…

MALICIOUS

PDF

73.2 KB Created: 2021-09-04 21:19:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 43652bcbf4f5601d58f5b1deb7c1c019 SHA-1: 6a73b1bcfdf2b968fbaa8c97332596e6a751b499 SHA-256: e0a78994f936bd3005c72806e11512f53a1693cd4b64de377403fcb137b9895a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution attempt. The presence of external URIs and link farms strongly implies the document's purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9915

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://pixomot.ru/uplcv?utm_term=decamp+66+bus+schedule+pdf PDF link annotation
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/46af591e7373cfa206f9aace0541829b/jelojine.pdfIn PDF document text
    • http://osc-pribor.ru/products_pictures/file/27812011141.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/23qhkcflar238o50qc05ck55jb/45923160936.pdfIn PDF document text
    • https://paardenwelzijnscheck.nl/app/webroot/files/ckeditor_files/files/49367108152.pdfIn PDF document text
    • http://bennett-legal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rejajime.pdfIn PDF document text
    • https://www.cifphosteleriayturismo.es/ckfinder/userfiles/files/vobodugetikesulemijig.pdfIn PDF document text
    • https://avela.md/userfiles/file/pabofetisujobujijo.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/0e0d2c9deb752be7ae6f8dc4dfdb1f5d/33977754956.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/157725952060f281e08f3e6.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/88acdbb3c63b4f133e52769315e45df5/3036540074.pdfIn PDF document text
    • http://abnicum.com/files/file/dekotadifuwozesosi.pdfIn PDF document text
    • http://patokapugsnkisses.com/clients/61143/File/jarewigesawupeluto.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/48745786352.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/vuvatgphr669vltug07dfjcks7/xokikopewugorugewaj.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/9452a83419ca6254746fce7e86bfc291/85358709068.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/76580824407.pdfIn PDF document text
    • http://maremio.ru/admin/ckfinder/userfiles/files/59638423713.pdfIn PDF document text
    • https://shibbirs.com/media/files/mokow.pdfIn PDF document text
    • http://schokobrunnen.com/idata/zerilujavapasalij.pdfIn PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/goxanotaxefaretevulak.pdfIn PDF document text
    • http://dzwigipoznan.pl/userfiles/file/zevekolosatozinofulakexas.pdfIn PDF document text
    • http://soluzionebenessere.eu/userfiles/files/gunirazulonav.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607edf59db508---73867846095.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/a6154ad4e510fbb188cc229d14bef148/82097637360.pdfIn PDF document text
    • http://teakdeck.pl/files/file/xofawozadepep.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9e66280f6---jonekuv.pdfIn PDF document text
    • 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_off0000bc17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC17 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD429 16408 bytes
SHA-256: 2c3c0c0a2504c032a2a133ea95808b5d678c9e64634e37dfddd3a0988a44ada9
font_02_sfnt_off0000fe60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE60 10780 bytes
SHA-256: 061154da18aabb750c3bce411d3bc2099b06c34df3755bb6f09648e8a7b3fa8b

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