Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cd59184296ffdbc…

MALICIOUS

PDF

75.3 KB Created: 2021-09-05 15:34:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 37d8a25b1a46a1ca9f72ed780deeb1bc SHA-1: c78bcbd5f324fa9aa1cf41e34f9d20f5444a9355 SHA-256: 5cd59184296ffdbc0c9d18d8e41b81759375ff6e2662d23cf9f780ed457b4d6c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics reveal it contains a link farm pointing to compromised WordPress uploads and other disposable hosting, suggesting it's used to redirect users to malicious sites. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/09a47fce2a41d2a223d007aec7f24a47/kogomozarer.pdf In PDF document text
    • https://charterboatdeliverance.com/uploads/files/45327607916.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/20329278406.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/rakijetelakito.pdfIn PDF document text
    • http://tdsns.ru/userfiles/file/kufobomidujazeseropono.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/e44b512b99681836724e35c1ed6a9875/54075782888.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6dbb0f4f4---wiguxulinetisawexax.pdfIn PDF document text
    • http://dbcasagayathottam.org/assets/uploads/cms_images/files/temamuketisukop.pdfIn PDF document text
    • http://sambometal.com/dataroom/file/46638176129.pdfIn PDF document text
    • http://uco-kampen.com/media/files/xupub.pdfIn PDF document text
    • https://raljob.com/userfiles/file/fewifufoduzufam.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160843cfb23a33---jaletewijobas.pdfIn PDF document text
    • http://bronia.org/userfiles/file/ranazepobu.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16075863dc6d33---vafaveved.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/finuzudila.pdfIn PDF document text
    • http://tv-kitchen.ru/files/files/79976991538.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16083f7dbbfc21---vokabepejudogudomamag.pdfIn PDF document text
    • http://iuoooo.com/filespath/files/20210815005037.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/8d7e25d3bef30d66209a9664295c3efb/jujozejadenibiwofoso.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021052620163699.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e0417f0a67---jebugasufok.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/2bf244d683b8537709d7cde5cb206484/vewaxudisig.pdfIn PDF document text
    • http://thesciencenetwork.org/uploads/files/kuwoxafobukepofiwitob.pdfIn PDF document text
    • http://agro-pasz.pl/ckfinder/userfiles/files/50968742650.pdfIn PDF document text
    • https://confetti-seasons.ru/upload/files/8808664506.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=aplasia+medular+pdf+2017PDF link annotation
    • 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_off0000c2d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2D7 16760 bytes
SHA-256: 701aa3b1bab036311707a27beb3c8309b4da055ad5995099abeeb944d6d66c87
font_01_sfnt_off0000ee49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE49 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10660 10764 bytes
SHA-256: e4b4f7a9872d8d84463dbc7dea22b1fce9f990da3faaa16d440deac4dc1e51ee