Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed2a5fcbbed37e8d…

MALICIOUS

PDF

90.1 KB Created: 2021-09-02 06:59:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a4c34507eadfa511adb5fa14faf4ff22 SHA-1: b1ad41056b1e4dfd10781e0addec44404c04b31d SHA-256: ed2a5fcbbed37e8d15a43b99f361916d89b85accd2b1bec3673d2ef9d9377f7d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware delivery mechanism. The file contains numerous embedded URLs, many of which point to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. No scripts were extracted, but the presence of multiple external links strongly suggests an attempt to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

Heuristics 6

  • 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.
  • 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://inwebjor.ru/uplcv?utm_term=neet+ug+2020+question+paper+with+solutions+pdf PDF link annotation
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/55b26d3b2d5a0c035a092711c0bf3df5/92313416211.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b44027e72a---meloxesisaxojodejapodeno.pdfIn PDF document text
    • https://bodzlomu.com/userfiles/file/bafonatobube.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b84206c6bb---28315728053.pdfIn PDF document text
    • https://edubox.mn/uploads/users/0/files/17145969457.pdfIn PDF document text
    • https://weyergans-hcc.lv/userfiles/file/nodisozenuburifoxebeboz.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9e648c9b9---jepitorosomapajotiwe.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160835bdd3f23f---22888223367.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/eb75f9ccd05e518f3dbdbe4945946eb2/jawijedajolopodojutumov.pdfIn PDF document text
    • https://iword.de/userfiles/file/25682416536.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9d7008feeeae43cde91859413b8015f4/93555317553.pdfIn PDF document text
    • http://testsitehq.com/ckeditor-ckfinder-integration/uploads/files/lebos.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/ae8uloqol22467gq35i0phus5k/83099489718.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a51c61d77e3---sawutixenotunup.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca0a8037d0---zefaxuliseka.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/fnhnju7tpevobrefpvvvvt5782/48968508602.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/pisoka.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/tagoriwigetos.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/voluvirixowemifimisugi.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092e01086128---29162307119.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/cbd137ff82d0d927e1f8d01cfba2f891/60635858538.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/383ce862afd41d3e184f596cdb8e89ba/wazis.pdfIn PDF document text
    • https://manenshop.com/upload/files/41810352598.pdfIn PDF document text
    • http://lohoithaiduong.com/uploads/files/kenadolulekuneremubov.pdfIn PDF document text
    • http://indexone.ru/upload/file/xadexeven.pdfIn PDF document text
    • https://agmatbaa.com/upload/files/sumafig.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_off0000f1c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000109d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D3 21064 bytes
SHA-256: 061a1f79eaa3b8134b90114a2f2a2db136a4316559c625179bf5990eb59ebe7d
font_02_sfnt_off00014021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14021 11328 bytes
SHA-256: d6656ce0e35822d569217fcb2a6b7a232d44490b5501eda534f576187453f1e2

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