Malicious PDF — malware analysis report

Static analysis result for SHA-256 6078c0e87ac3d682…

MALICIOUS

PDF

74.1 KB Created: 2021-09-02 19:20:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2b98619aeb9c84f6169a0537324b6469 SHA-1: d83789561e35ea511db4658fb94808bbd9194bc1 SHA-256: 6078c0e87ac3d682630b6663fe9508ecaff80e74ab1823095b1ce9fca9733b56
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links to potentially compromised websites and disposable hosting, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

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 http://bogelaipigeon.com/upload/file/sijukixode.pdf In PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/14a04e5a15a264805b7383bd62444ed6/gonuloxi.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16092a8c0c38cc---76683854677.pdfIn PDF document text
    • https://homecareangels.ca/files/files/files/tejemaporewofovozam.pdfIn PDF document text
    • https://chupwo.com/editor_upload/file/fukisonodebajokuxuvu.pdfIn PDF document text
    • http://www.badischer-kunstverein.de/ckfinder/userfiles/files/36987459923.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb81d65851---kubewajukuw.pdfIn PDF document text
    • http://rulife.ru/ckfinder/userfiles/files/furikegarijageratuxe.pdfIn PDF document text
    • http://abwingsde.com/uploads/files/buxewagupasa.pdfIn PDF document text
    • http://kielcenoca.pl/files/file/4599836010.pdfIn PDF document text
    • https://www.stjohnhomelessshelter.org/wp-content/plugins/super-forms/uploads/php/files/3fee83b5d26b1cf9601f917fccdec3c5/razivirumunosipaj.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/e069973228dfe718363e5ba60164c54b/vufexejamozo.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/20459438223.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed54187b07---30155179567.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/3180956062.pdfIn PDF document text
    • http://samtekelektrik.com/files/99909682910.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/nifomazera.pdfIn PDF document text
    • https://xn----7sbbg1ddpkdc.xn--j1amh/uploads/files/rumeja.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085527157bfb---4945772621.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ee387ead74e---molarotuxakex.pdfIn PDF document text
    • http://aescantabria.es/upload/fckeditor/file///32411057444.pdfIn PDF document text
    • http://test888.org/uploads/productsfiles/20210706065730_b496c.pdfIn PDF document text
    • http://dh-cell.com/ckfinder/userfiles/files/medobajeruxazan.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/n20imikfkotuis1ft4cfc84ter/92320935161.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608d61ff2ae6b---96240427747.pdfIn PDF document text
    • https://floresdeserrezuela.com/aym_image/files/razutos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=run+on+sentences+and+fragments+worksheetsPDF link annotation
    • http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/ziwob.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_off0000bed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBED3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d6e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E5 16228 bytes
SHA-256: 4fbca7a009e617bcbb930d0f9012a6f551edeb08763f3e822127017af0d08bf8
font_02_sfnt_off00010038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10038 11108 bytes
SHA-256: 41f807bcf27d6b4d41b20528cff6732ae2bd41cd5f0b6f32043505ea6c59f15f