Malicious PDF — malware analysis report

Static analysis result for SHA-256 e003adc1ec87d7d2…

MALICIOUS

PDF

87.6 KB Created: 2021-09-05 03:55:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 203eda8ab8c24aae091bc20aaeeec32a SHA-1: 2d83154e84c133813cdf2625aee7eb51e8b2b3a5 SHA-256: e003adc1ec87d7d20f1df8fe2263fca683a6331c01519f9f1f18fc1eb1b0f888
164 Risk Score

Malware Insights

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

This PDF contains embedded JavaScript and numerous external links, many pointing to compromised websites or disposable hosting, suggesting it is used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to these external URLs, which in turn may serve malicious payloads or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • 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://medvor.ru/uplcv?utm_term=edmund+husserl+logical+investigations+pdf PDF link annotation
    • http://clinicaveterinariamontecchia.com/userfiles/files/mogubuzefirodamodevodur.pdfIn PDF document text
    • https://stpatswatertown.org/ckfinder/userfiles/files/43440167798.pdfIn PDF document text
    • https://gymlesgeants.com/upload/editor/file/26065971786.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160e6344ea0732---18530300469.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a61c395d272---riguvu.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8d186c452---75537497162.pdfIn PDF document text
    • http://napiarsaigh.com/images/jobitukoroje.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c03177a8e8a---36312453165.pdfIn PDF document text
    • http://j-line.ca/fck_upload/file/19703978846.pdfIn PDF document text
    • http://www.moyekolodin.com/files/82467000882.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3f0fb167c---75624154038.pdfIn PDF document text
    • http://jun-travel.com/userfiles/file/20054533867.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/kedatafumalowurujale.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/7lf7lbg2bvhgnomh2an75csjek/sefodepitonuwunom.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/97021489515.pdfIn PDF document text
    • http://ned.ru/uploads/files/vemumiwozuxe.pdfIn PDF document text
    • http://toanthinh.vn/webroot/img/files/navetatevifuxepizox.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/muvobakimuzivifekuxep.pdfIn PDF document text
    • http://hiace-yoshikawa.com/js/upload/files/bozosigixovujeneziliduvoz.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/slvrc07ae52fkd35t82u92r162/39252747654.pdfIn PDF document text
    • https://nistd.in/userfiles/file/76417788338.pdfIn PDF document text
    • http://fese.in/ienupdimages/images/files/93762771077.pdfIn PDF document text
    • https://semut73.com/contents//files/kenanatumonumot.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/11851126809.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_off0000eeab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000106bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BD 18520 bytes
SHA-256: 343b7172b80183b3170b5b125820a96f03badf9675b38e4a1be0f44506821f02
font_02_sfnt_off000136f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136F0 11216 bytes
SHA-256: 747ddd7acb4848c9237241b8249c2dacd2e6e0ab3c488fdd078965639c453396

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