Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ce3d490dad86b7b…

MALICIOUS

PDF

82.1 KB Created: 2021-07-31 14:46:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 47d2c047adf39ccb72fbdc5f1179801d SHA-1: b23e5d12a5bbfd5a5b8503b4ca0192e3b1e91c3a SHA-256: 3ce3d490dad86b7b7cd5e4f9b03f187a8f5d61ee6934b132ec426a38915e41cb
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload storage locations and disposable hosting sites. The primary purpose appears to be distributing malicious content or conducting phishing attacks through these numerous embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://wastran.ru/uplcv?utm_term=khanderaya+zali+mazi+daina+mp3+download+320kbps PDF link annotation
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c0e5ee08859---lapirigemibizamuvolabe.pdfIn PDF document text
    • https://otoform.com/upload/ckfinder/files/wanopepe.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2ffb20c13---rusuzunevisebeboxakus.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/7c9cb9cb89334f4c0cdae7148c77dbd6/solob.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b788e3f5c6---77473881682.pdfIn PDF document text
    • http://munnarinfo.in/userfiles/file/kaderadexusuguzogorobok.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/087sh2i0e4lfea6deebu8efuka/gukenipenotojetumat.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/92238723973.pdfIn PDF document text
    • https://francoisdaulte.com/ckfinder/userfiles/files/resixepebiwudozuwa.pdfIn PDF document text
    • http://castrolmintabolt.hu/images/upload/file/jivapapevijidolitutuwijil.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c93c34626a5---36006237164.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/vozimu.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/20628210702.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ba05cde0606---losufekazujegan.pdfIn PDF document text
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/dbc12d8960169dabdef6352c5b332940/75747297402.pdfIn PDF document text
    • https://vibangthuaphatlai.net/uploads/files/2667731433.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/qnhvees4ltaaf6vmhnpm9r4dp0/revupaj.pdfIn PDF document text
    • http://www.catedralirodahaz.hu/data/editorfile/96050616606.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/af01a0f617f443ebb41f0885cb90cd93/tixenuvaluxewanix.pdfIn PDF document text
    • http://heureka-cz.eu/files/revofalixezavor.pdfIn PDF document text
    • http://latexindia.com/userfiles/file/bomojawirafonaresa.pdfIn PDF document text
    • http://fitviewer.de/files/file/98532503050.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607185a51eed9---947577521.pdfIn PDF document text
    • http://szsahsh.com/uploads/files/timutetabagugikukofabur.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_off0000d9c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C4 11456 bytes
SHA-256: b8752e15d5ed7ba424bd69e8b866c5fac61a644145904546b9416c44bbe15df5
font_01_sfnt_off0000f475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF475 17232 bytes
SHA-256: c6aede3ac8c2ccd7b314e98b913b8e8be9016d3fecb11efada0439fca7305194
font_02_sfnt_off000120ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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