Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5ececc3ebb995d8…

MALICIOUS

PDF

92.8 KB Created: 2021-09-08 00:48:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4a8bbd28c0aad8824526a3ffc0d0f637 SHA-1: 2bf610576b572e2f8298c32ee83e91f3c9ad5abc SHA-256: f5ececc3ebb995d8401947f1fb6f1148f6750e96afc5e5538d3d69b4d54c88f3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://pixomot.ru/uplcv?utm_term=honorarios+abogados+madrid+pdf PDF link annotation
    • http://dainichiji.com/upload_ckr/files/totivuma.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/86c14b24ba6400aed4dbee28c1886653/jawusumojopimog.pdfIn PDF document text
    • https://valve-toho.com/userfiles/file/48582967958.pdfIn PDF document text
    • http://posekatzahradu.cz/files/file/likebol.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/c909b9eb09fd05f90f5f91ec92fb7af1/5780504891.pdfIn PDF document text
    • http://www.morrisjones.co.uk/EditorImages/file/tarorulatutopu.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/3e7ea96346397c2f225065c1ad14b5df/28905830228.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160868bdfa0ccf---33181063476.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8f31906758---82086439398.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16098ac4f9c02b---piwutewapab.pdfIn PDF document text
    • http://amctop.com/board_data/editor_img/file/202105101150.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/6b518e4b73ba09676de1199665430f17/77581866723.pdfIn PDF document text
    • http://chiaranannini.com/userfiles/files/tikavumasefatemabelanu.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/21859604753.pdfIn PDF document text
    • http://yasairamenbar.com/uploads/files/74347564448.pdfIn PDF document text
    • http://iphysiology.ru/upload/41833258893.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609afa721a299---temaxis.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/zotuloxalemogiwozesetos.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/b70c351dd2a5c064519a35e96d1cb35d/80503663008.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9cfb1df1b8---zunuzepev.pdfIn PDF document text
    • https://polresseluma.com/assets/ckfinder/core/connector/php/uploads/files/25425349003.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee32e1352f0---revikirokizu.pdfIn PDF document text
    • http://statewideroadservices.com/clients/879378/File/dowodosukitapizi.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/637f0619012a93f82376e46bc5727a46/19837070913.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_off000103d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D7 19192 bytes
SHA-256: 63eaddbf56f9191f5da840f3bdd16f74548c314da75ba2f479054bbb6c1d3937
font_01_sfnt_off00013528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13528 10696 bytes
SHA-256: 4b6848af3f2d17ace6fba0560807e3454dfea519842a942d8db88aa87d0a2d1a
font_02_sfnt_off00014d25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D25 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.