Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd06f5fb2a123f95…

MALICIOUS

PDF

79.1 KB Created: 2021-07-04 17:04:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 40eed5dd264170c860c549d21e2b2ec1 SHA-1: fdc00106ca0bf0a5f9a9970d37745922b516234e SHA-256: dd06f5fb2a123f95c4dc3621ee41226547a559db4391d6c6644dfe4b20d2faa8
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document functions as a lure, directing users to a link farm hosted on multiple compromised websites. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates that the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway scanning. The presence of numerous PDF files hosted on compromised CMS upload directories suggests a distribution mechanism for further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://alixdemassy.fr/userfiles/file/35692906667.pdf In PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/43124cee032144c2a5c7c4576089e7da/8210906777.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ac381a099e5---60094594296.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160c4da961f8e5---10735890261.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160738350c6349---37498577746.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/a21603d9f442507838fd4890af07160e/14091737313.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/667960601eb7dddf1a3c4704951acfd2/53208161112.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/kasoxixugakomilor.pdfIn PDF document text
    • http://101-games.ru/images/uploads/files/dulejezekupajusizitup.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/25f507mavtus26r7unde227e04/nufoxivijufanabexatovi.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/fanaf.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/b8ccee4a530f71c1355778fa4ef124e8/66050187016.pdfIn PDF document text
    • http://thallo-food.hu/uploads/ckfinder/userfiles/files/2596713028.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/m4m9mjt24li9lkqr3rq7imnjqe/melezowola.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/2c362815ea2b04a564297bf118e0e622/96882627856.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/371578a714e27a76bc27a95c745f33e7/lemetu.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ced5cde5523---76196584427.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/mojora.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/0h7n4si56jk6kkkaot9tlc0it0/103866012.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/22e4871bee17dfa216ed91908acae2ed/79237618828.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c9972248809---sovukemafopiv.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/82c0967aa79761a86ccd011dd4d4bed5/luzoxanaxi.pdfIn PDF document text
    • https://perfecthospital.org/FCKeditor/file/pamipegibekelapavekivi.pdfIn PDF document text
    • http://phanphoiongnhuahoasen.vn/upload/files/23991870570.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/8ttih1kpdso8fcpv16ilil109u/24978297120.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=james+and+the+giant+peach+pagesPDF 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_off0000d121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD121 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE938 10684 bytes
SHA-256: 9ba6fbd9ca535b7d2cff76d5375ede85472303e280d3d813a7cfdca3f53c0bd2
font_02_sfnt_off0001014a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1014A 16780 bytes
SHA-256: b237dfd223b6fcb611fbb24b4dadfd2a64210630e7325c0819f6e481a19b5219

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