Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e6b79a6c1e6a226…

MALICIOUS

PDF

87.6 KB Created: 2021-09-04 08:17:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 18e166636dff2a5d544ab3acd0c9da18 SHA-1: 86abbad761ab11c97f2f5454f390641879fb18b6 SHA-256: 5e6b79a6c1e6a226249a0b72b55327c08d72c214ec3a49b9807e772177cbfb7b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The presence of numerous external URIs, many pointing to compromised upload storage or disposable hosting, strongly indicates a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=maruti+suzuki+joint+venture+case+study+pdf PDF link annotation
    • http://simmsfamilyreunion.com/clients/9/98/98d47f1658d09d39d77ba56043454c9c/File/43197126662.pdfIn PDF document text
    • http://rowsontw.com/shopadmin/upload/files/tivugonivoxuzatej.pdfIn PDF document text
    • http://artospace.com/pics/file/45970194000.pdfIn PDF document text
    • http://thecrayfamily.com/clients/36408/File/kowemirizimu.pdfIn PDF document text
    • https://all-new-wow.com/upload/files/59362653437.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/47ba23b7430c61d6f9ad70a71be2dd54/71349480275.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///14868719170.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/r48cubeijh6i8ek87v7i1ioep3/kuxejatimogamug.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/gowapaniralidaloluwunuka.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a3569bbf7---wilajafegamifutukavilalem.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fefe792d72a---91833842084.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/ca245999aa0df5e5cd14dfaf291993d1/82146523861.pdfIn PDF document text
    • http://szjg.hu/images/file/peluguxediriniz.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/b378f133d6664e4cfa4706df467cf6a5/66590698956.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/39873449613.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/zepixekumaxosuno.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/b20970e4d9ca17028d1638f57f2e1a8a/fepezazimamapokexureviw.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc0d6c7a80e---fadifodilewoletu.pdfIn PDF document text
    • http://c-amc.com/upload/files/kubuwoxamezusi.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-5-2/20210502204828728963.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/n7hh31f8e4arh0ut7hqtbfbsnk/80182511614.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/13b60c6820b233e64e0bd261ef9c25db/bobutexanad.pdfIn PDF document text
    • http://deepakbatteries.com/uploads/file/sibunaguzarudaroner.pdfIn PDF document text
    • http://paintmaster.hu/js/ckfinder/userfiles/files/xaxodezomimisarizegez.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/sfmbcrf1pqtp3qo7u8v09fgo2q/61181570124.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/a6f3b6182f0e6b3a29cfed180080fa58/59402307059.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_off0000eda0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA0 17976 bytes
SHA-256: 9e232141f3b02387ec7bb5f08dbb9b83693b3fa77a209380f98cf2c27e0ed326
font_01_sfnt_off00011c33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C33 11120 bytes
SHA-256: 3883f28745bb6fe589cc89bc668d109a79c9250f6336282ee43cca95ae186782
font_02_sfnt_off0001365f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1365F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1