Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b00bed4ff5c7426…

MALICIOUS

PDF

631.9 KB Created: 2021-08-19 13:08:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: b1c46378909b813e0395f2993abfee80 SHA-1: eb32966dd1c6e996992aba7e2bcbf13f34318b30 SHA-256: 1b00bed4ff5c7426a83675d95ce93785b5c42aa0052cdc640a9c006207a93b2b
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The presence of multiple links pointing to compromised WordPress upload directories and other unknown URLs suggests a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5693

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://vetsnab32.ru/userfiles/file/vikejigejijetamav.pdf In PDF document text
    • http://glastergroup.ru/userfiles/file/fanamuruw.pdfIn PDF document text
    • http://ndt-ultratech.com/files/lilimigonudome.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/bd6932d90759405aed26c2c44dce0644/431671872.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/29243763231.pdfIn PDF document text
    • https://grupo.iberia.es/js/ckfinder/userfiles/files/95149336220.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/60170224987.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/66384b5bc4f3b242f04b867d50f926c0/mumivorugewulov.pdfIn PDF document text
    • http://tiszaladany.hu/upload/file/15279565761.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ba696d14c---japovinusus.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/fkimmi38qcau7k37bqsfp57meo/74904537463.pdfIn PDF document text
    • http://hocikto.info/userfiles/file/pebafubuk.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/5a1bf5e6e04f85bf2075d309d30627b6/xedewu.pdfIn PDF document text
    • http://thegioituigiay.net/uploads/files/damugiwafuv.pdfIn PDF document text
    • http://honghuibio.com/d/files/97119799829.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607778487610d---74134158121.pdfIn PDF document text
    • https://selapro.com.au/application/third_party/ckfinder/userfiles/files/3505600628.pdfIn PDF document text
    • https://magnettoptan.com/upload/ckfinder/files/30243286424.pdfIn PDF document text
    • http://shannonlakeestates.org/fck_images/file/85790531442.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1b8e9228e4---dukewe.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/dko56liq2r203r9dmq2keuc42n/76076007852.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bc30bd80a1e---zubowixoxukol.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160974d4683a98---47295873922.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fc66ae6d748---94205186912.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=guerra+mundial+z+2+pelicula+completa+en+espa%C3%B1ol+gratisPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_009_off0005c11b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5C11B 395004 bytes
SHA-256: ec630c0a7cce8ab9aee994aae66b906c8f73a18d2f6eb706845c07e8743d4711
font_00_sfnt_off00058ba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58BA2 18292 bytes
SHA-256: 2c41ac5d80b94309601633456cffc88c12073b691732a88eb63d29b462eb2202
font_01_sfnt_off0005a6b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A6B5 11380 bytes
SHA-256: 46910a6363e4fcc02e3cd04b6d5cbc753429b7deb3f1e09bb6a761588441bc0e
font_03_sfnt_off000975b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x975B0 24204 bytes
SHA-256: 468586188b58d96eb2b1f1bb5cc3d40b8869e5b4cb28a0d0a81fba9285dce6a8
font_04_sfnt_off0009b3d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B3D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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