Malicious PDF — malware analysis report

Static analysis result for SHA-256 7198de628ff34cc4…

MALICIOUS

PDF

73.6 KB Created: 2021-09-02 05:29:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fb170a13f12970bb415e10af49e4ae7b SHA-1: 329f093e4141c8e436d8fd142c25abc51e96bb9f SHA-256: 7198de628ff34cc41b836c5c54954a5a7ad7df0d289b6fbc5d197a08b81731fb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to lure users into compromised environments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://philabc.ru/uplcv?utm_term=titanic+theme+song+mp3+320kbps+download PDF link annotation
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/5759a8091d1961a724ce7eb10f0d495b/4445016187.pdfIn PDF document text
    • http://ersatzmonitor.de/userfiles/file/46778768472.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c87f37618ba---63846106180.pdfIn PDF document text
    • http://tulsamemorialclassof71.com/clients/84987/File/xilato.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/23860407789.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/e0cea6b170f082be8ccc47e7fb0d4ce8/jerus.pdfIn PDF document text
    • https://pk-kuepfer.ch/ckfinder/userfiles/files/penevilategukujonafutuwo.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/dc07933deabe50af3d46563a9835c734/puzutexolip.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608fbcceceee1---sezowibo.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/e9aee333a8bfd6b2ccca6dba8fda1edf/67556490452.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c58a69812a4---32362493629.pdfIn PDF document text
    • http://aitrans.org/UploadFile/file/F1202108212019086710.pdfIn PDF document text
    • http://habitat3.eu/userfiles/files/58012708720.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ffc6a09854f---27881952513.pdfIn PDF document text
    • https://rdsdealers.com/ckfinder/userfiles/files/99184090826.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/dofutojagasitudajigi.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a383944ce09---tureti.pdfIn PDF document text
    • http://georgefamilyreunion.org/clients/86186/File/43293699506.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/pa43vcb58esl210rufmakv23g1/53877856450.pdfIn PDF document text
    • https://maintogelonline2.com/contents//files/10591755749.pdfIn PDF document text
    • http://homeshopeez.com/uploaded_files/userfiles/files/26829813033.pdfIn PDF document text
    • http://design-klasse.de/ckfinder/userfiles/files/jovixexuw.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100220299360---sevalavuruvubumowiku.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611473f6d34c9---31927993318.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_off0000bbc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBC3 16180 bytes
SHA-256: 107ce975fd9e1479159299b82a1255afae0ff8c2d200a1ad2e6e8bf52da4542e
font_01_sfnt_off0000e4f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F9 11556 bytes
SHA-256: 9135324d5f82a865f89f77a65e27ef447624f069ddf1c7df6ce9e485ac6b4e34
font_02_sfnt_off0000ffe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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