Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7b6daceb8acd610…

MALICIOUS

PDF

80.0 KB Created: 2021-09-05 23:44:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 93669e74174d87688b9a3567f6879ed0 SHA-1: d6fb08f74e8b457c56d06b4796206ddf83cd2671 SHA-256: d7b6daceb8acd6101aba28d8f087c3ea6347e0b60156890b70616a47645a281b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a deliberate effort to create a deceptive web presence. No scripts were extracted, but the overall structure and URL distribution strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://garglob.ru/uplcv?utm_term=manual+candidato+enem PDF link annotation
    • http://upnbkk.com/file_media/file_image/file/minogebitulusagejemegifi.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/84398748769.pdfIn PDF document text
    • http://xmst.com.vn/app/webroot/uploads/files/7878912999.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a3055870af6---96836893725.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ffdd0cc654a---metetuxatekalovokutof.pdfIn PDF document text
    • http://abnicum.com/files/file/56207985843.pdfIn PDF document text
    • https://apskarota.org/userfiles/file/87530941884.pdfIn PDF document text
    • https://asiarsolutions.com/userfiles/file/takudopikotasi.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e84b29792e---vufusebagowaluresuma.pdfIn PDF document text
    • https://wendi101.com/userfiles/file/99547330012.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/68629426625.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/96ce97ad8f2dd6dc6bdf4558660e2f38/tibaveve.pdfIn PDF document text
    • http://www.ciesol.es/ckfinder/userfiles/files/47736776641.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b87847be234---pijep.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609feebc6fcc1---jekikoxufu.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d8cfc4ca7---32451789748.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/00ge2aee578fu5qi0psq34g8jp/217517474.pdfIn PDF document text
    • https://performanshost.com/calisma2/files/uploads/rirukox.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/4pa06logp0huf8ikjq0ap9s5co/rapexafoferilanosilumizi.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf2b40232a---fusebapagazis.pdfIn PDF document text
    • http://studiofagiani.eu/userfiles/files/54957564817.pdfIn PDF document text
    • https://prestinireedcorp.com/userfiles/files/roguv.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/lutesoxezuritekumejeniga.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/57773636541.pdfIn PDF document text
    • https://hunghiephuylog.com/upload/files/11639462356.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_off0000d56f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD56F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED86 10356 bytes
SHA-256: 9480be704a14fb241f707aee5c0aa77e1771bf8e261419bf57e009e8f0490930
font_02_sfnt_off000104dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104DC 17796 bytes
SHA-256: 039308742f855b78718b5072ad7f25644cf9f0fa059fdc86a543aa01988f7319

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