Malicious PDF — malware analysis report

Static analysis result for SHA-256 334804d490ecae62…

MALICIOUS

PDF

264.2 KB Created: 2021-06-24 07:22:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 33fa862154a1e5e4847a6fda0b8388b4 SHA-1: e170d78bff7cddf0f0f84e71eedc9521667426f0 SHA-256: 334804d490ecae62191efa0de2b21311109fd86824591d3ed4bbe7e00dca3ea0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites, specifically targeting file upload plugin directories. This pattern is indicative of a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 5

  • 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.
  • 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://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/8b37695ea683b68c811b6be1a2550966/71156346052.pdf In PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be91198ca3f---zanawikej.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb4a81b2e0---60074525404.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/avs0oab74ta3fi2vna0bsgi4uq/lawonejamotenaxaw.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/c2a408f71541a89f2a65c5039a40b7da/13736841550.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/86d4c395d58418c8653b98e177385e23/pewusotezin.pdfIn PDF document text
    • http://z-i-f.ru/userfiles/file/72494761760.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/ae593111a5358790d6bf7afa0e6bb3b1/419587993.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/72a1966fefab4ccc24df0991cebb6fe5/pevoxakago.pdfIn PDF document text
    • http://blesk-stroy.ru/userfiles/files/78364201985.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aba6255fdf0---89439709950.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/7f27e078e4869c4756e1e3a626758761/fofekoviburulikinerisafun.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1495e17f85---viwiwopimawip.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/85817284497.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/ev5igot43271gejfq5j98psrac/45800006290.pdfIn PDF document text
    • http://hzqzg.com/d/files/17674688474.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f71862d90---62839650155.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fba063c15e---vubudajuvi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=notes+from+a+native+son+pdfPDF 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
    • http://scripts.sil.org/OFLIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0003d6f9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3D6F9 24584 bytes
SHA-256: 72e53a5427eb327c8d89d961c167b1e418d0da885b528b204c0c6c54cdabe13e
font_00_sfnt_off000385c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x385C6 5184 bytes
SHA-256: a659f6b352ca8dd96d01b07b9908f2d35eadcbf67a0fe4def735fb771ceb8176
font_01_sfnt_off0003975c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3975C 22216 bytes
SHA-256: 5fe3d65cdca71bb51bb16b9d2a312425c2e4a37ef178a9864dd8e496d128888b
font_03_sfnt_off000402a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x402A1 6556 bytes
SHA-256: bb930d607a68def357c9a6a02d9bca80d110c360a7be94666da0a92d641179b4

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