Malicious PDF — malware analysis report

Static analysis result for SHA-256 306ff40d9a0c4ddf…

MALICIOUS

PDF

82.4 KB Created: 2021-09-06 10:58:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6f701807257447a3e5adda2f72e337ad SHA-1: a0a11639fce2c0a9cbe2fccc52d94fe626aae4e3 SHA-256: 306ff40d9a0c4ddf7479ee60283d2fc0ff6ded63279a93b0e001911ed159d406
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains a link farm pointing to various domains, likely for phishing or malware distribution. The heuristics indicate the PDF is structured as a link farm on disposable hosting, with multiple URLs designed to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://pixomot.ru/uplcv?utm_term=glowworm+flexicom+24+manual PDF link annotation
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/4crkb5ee5hu2c0lcngc7qp9tu4/82951912471.pdfIn PDF document text
    • http://dribblebar.pl/userfiles/file/47468141794.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b70ebac040b---sadokepudipipudomelulok.pdfIn PDF document text
    • https://turdv.ru/SITE/files/editor/file/13987434538.pdfIn PDF document text
    • http://carlaschroyen.com/content_docs/jipimikelomipafopoput.pdfIn PDF document text
    • http://sungwoneng.com/upfile_editor/2021/files/99549355747.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/9cfc147d2a399be9644b5dcfd8037bda/weluwabofebobosezu.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/75615daa2695ae0cf43c570b17c98254/59715937313.pdfIn PDF document text
    • http://asavn.vn/uploads/userfiles/files/12045897457.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/161188b972950a---91435139022.pdfIn PDF document text
    • http://angel-conference.org/upload_fck/file/2021-9-4/20210904213153755064.pdfIn PDF document text
    • https://astek-telem.fr/userfiles/file/pasiminawilatakuva.pdfIn PDF document text
    • http://relaxzenter.com/uploads/files/femedoburogivofevaza.pdfIn PDF document text
    • http://maslag.eu/userfiles/file/besuz.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///rinogagimibizapojazujofor.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bf42999e603---jexonofisanupigokameroj.pdfIn PDF document text
    • http://domario.ru/userfiles/file/17261505522.pdfIn PDF document text
    • https://wct.goldcrownresort.com/magazine_files/files/puzabugutiwebokilo.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/ee8723495a6d0c6aa6f03f69ce1ff32f/fabibedifo.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a998a869fde---jurireg.pdfIn PDF document text
    • http://turinhotelcompany.com/userfiles/files/29191537212.pdfIn PDF document text
    • http://uitetenindex.nl/images/uploads/6066274469.pdfIn PDF document text
    • http://vnationwide.com/userfiles/files/57104662781.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/lazupojize.pdfIn PDF document text
    • http://glavis.biz/userfiles/file/wusizub.pdfIn PDF document text
    • http://lezeckastenakosice.sk/upload/files/35075157892.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_off0000dce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE7 17432 bytes
SHA-256: 2792f9d78746cf7394f8fb642a45d6bb6712878f4901f53c978ff23fb14eb21d
font_01_sfnt_off00010a8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8B 10756 bytes
SHA-256: 596a866419949409e01c2e85bedbb28c628a2f8cb5756225b396522249b50c1e
font_02_sfnt_off00012372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12372 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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