Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb7592bbb889d0ce…

MALICIOUS

PDF

85.6 KB Created: 2021-07-18 23:30:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a015cd71d730af4b31b79f1a9e4b3b41 SHA-1: 53c0eeade30d0acf8009608f6c60b02d752d481c SHA-256: eb7592bbb889d0ce31a2b90f68e456b4b832876c406e45ef937417f799584e5f
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to lead users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/0a862dc07ab0a1357982fd22a3426850/70222403186.pdf In PDF document text
    • http://bowlinggreenhsclassof66.com/clients/b/bd/bdf8ab256cd88a603fc2b95a051c5839/File/60046078015.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160aad8ff975bc---tabojoxoxunolesodije.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/c9ef38c32a495f27182ab605dcbb1d35/xejobepamuvomuwem.pdfIn PDF document text
    • http://pchs1967.com/clients/b/b3/b38b0c0be7ceca4b309dcb684d78a7c5/File/30165194746.pdfIn PDF document text
    • https://upchealth.net/wp-content/plugins/super-forms/uploads/php/files/01d08f34f4b302fe04eb027a2664fe0c/walibelarewakememibazeb.pdfIn PDF document text
    • http://maskaevlawyer.ru/userfiles/file/gelogukotuzul.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/c1bd9b56d9bd27742df1b71688c1b236/64515810282.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/ia3fu4jq0oih4uf0456ki95odm/50552543187.pdfIn PDF document text
    • http://spc1991.com/ckfinder/userfiles/files/ririxevoroferijitu.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/27n02mci9b8gd2n0h0jg1pj4fl/wapelamaturemu.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/0e38fca6dceb3f029321c36809a6bc52/28182166512.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/d90c8ae2f27afd367964b0f3ab5088bc/32803507119.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210518221249_336223454.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acabcb65a54---41364774439.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160779f167b200---tesunipifebibatore.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be2cb79c15a---72674202546.pdfIn PDF document text
    • http://baikalspring.ru/ckfinder/userfiles/files/1789793838.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/904c1fe2994f2b1a008c3f2eee2e8c61/xubikopiluf.pdfIn PDF document text
    • https://sonarmusic.hu/up_image/file/67144514709.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/1c285162d3054022cc599578c80866dd/84943042757.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1608528d856267---luzewapi.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/3eed42bca731fc190835c084f4300e62/28029430962.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/53fc466cdb3c04a8d71dcb1702937676/mumirovefefewak.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/negopipajusu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=best+streaming+apps+for+footballPDF 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_off0000ecc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC8 16676 bytes
SHA-256: 5162941994afc77b9a52a4a331eb92cd33bbf4f84d4b408089ce2e2509d5cac5
font_01_sfnt_off00011838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11838 10892 bytes
SHA-256: 03ccf4cd4915898768b7ee1d2be0133c9f197f43f3d24f0ac499d6966d66e48f
font_02_sfnt_off00013135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13135 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1