Malicious PDF — malware analysis report

Static analysis result for SHA-256 b00fc409e4f16c29…

MALICIOUS

PDF

83.7 KB Created: 2021-09-09 20:09:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ff7bb7f0f973b40ae50e3548f206e464 SHA-1: aea679e8f3557031fb35c3fc95756e6d448ed33d SHA-256: b00fc409e4f16c2908e5c25ab0300655d0c83e193dd3b5047a5b91080bf05ba1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to distribute malicious content or phish users. While no scripts were explicitly extracted, the PDF structure and URL patterns indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://allytemp.ru/uplcv?utm_term=how+to+check+whether+your+phone+is+hacked PDF link annotation
    • http://bluelakehomestay.com/uploads/image/files/buluvufinipurekudex.pdfIn PDF document text
    • http://kwartetproforma.com/userfiles/file/xegusasob.pdfIn PDF document text
    • https://wsbtitan.com/images/file/luzedaterite.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/kunelowumogiguwufame.pdfIn PDF document text
    • http://yjccnc.com/upload/files/27547548853.pdfIn PDF document text
    • http://bamboomfi.com/htdocs/cljr/data/files/50527864815.pdfIn PDF document text
    • http://prospekt-rostov.ru/ckfinder/userfiles/files/melenitonavugezaxevibeta.pdfIn PDF document text
    • http://furnitura-syndicat.ru/ckeditor/ckfinder/core/connector/php/uploads/files/50175167710.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/vovitemudinomujak.pdfIn PDF document text
    • http://youngthisyear.com/ckfinder/userfiles/files/8364992700.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/90024564231713c8a9e5d0338c63d183/xiweg.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/161369745b9910---vaputosutuzewu.pdfIn PDF document text
    • https://ismet.com.br/ckfinder/userfiles/files/47628856999.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/34897885383.pdfIn PDF document text
    • https://quangcaowebsitecomvn.xemlaco.com/uploads/files/wevoviwoxufug.pdfIn PDF document text
    • http://flightshop.jp/images/blog/file/6441744809.pdfIn PDF document text
    • http://bdpq.hungminhits.com/files/uploaded/files/riwozefaxufuvibu.pdfIn PDF document text
    • http://stellarp.com/userfiles/file/pukumopuzowepovubami.pdfIn PDF document text
    • http://isspskola.lv/userfiles/files/gapisoromibemofavine.pdfIn PDF document text
    • http://astmasme.com/userData/board/file/pagowitarikoxowofilepuvi.pdfIn PDF document text
    • https://cbdc.co/uploads/ckfinder/userfiles/files/pizoduxisotu.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef2017dca3---25944922775.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613149b1df541---dinobap.pdfIn PDF document text
    • http://farmaciafici.com/userfiles/files/deriresixedupajov.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_off0000e144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE144 10948 bytes
SHA-256: d64a355fd3de98bf0ade403d78a1917918ab1f72783cbdb3e2f0de8c3efb2d4e
font_01_sfnt_off0000faaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000112c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C1 17768 bytes
SHA-256: 2d9e32c10e4747021b90c0f9e5ac084b953a1c54e235dd262930395df310085c

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