Malicious PDF — malware analysis report

Static analysis result for SHA-256 07596eaeadade51a…

MALICIOUS

PDF

75.3 KB Created: 2021-09-03 07:37:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5d3a578a20a4b793f363214d23a1ddae SHA-1: c7559b0f8decc9a12aa77a9fa9089f0c84589d2c SHA-256: 07596eaeadade51a52c2dedbe3ab122e01295cc05767455e8a5365b5564727b9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised CMS uploads and disposable hosting, indicative of a link farm designed to redirect users. ClamAV and ML classifiers identified this PDF as malicious, likely a phishing or trojan delivery mechanism. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's part of a phishing campaign, potentially using embedded JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 http://tuhs1970.com/clients/a/ac/acc339db084e87cdfae31a76a6c96f1c/File/7613823598.pdf In PDF document text
    • http://naturestuff.nl/siteimages/file/61292808344.pdfIn PDF document text
    • http://yeosingol.com/FileData/ckfinder/files/20210828_50E1A1C3C92D857B.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f33a2122ec---92019738595.pdfIn PDF document text
    • https://hotel-la-licorne.fr/userfiles/file/tuxobopudopofur.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/23339195f9a780df7420dc9e05c98c0d/21892655950.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/26993f776981a78a4279cdba9f35f294/79380553107.pdfIn PDF document text
    • http://statsale.com/data/upload/ck/files/kazokajigobobedovezif.pdfIn PDF document text
    • http://etenindex.nl/images/uploads/82508848418.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210509031744_495031648.pdfIn PDF document text
    • http://gloucesterclassof81.com/clients/23558/File/35358389315.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/ed98f8707fa239b0e459909c4185058c/nerixajeb.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/cbf2e2d6380b040f997a66d672f29683/82299734896.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/segepuwaranat.pdfIn PDF document text
    • https://pianoinprimopianofestival.com/uploads/file/tadafu.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078c723e7e4a---23070404834.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/c1e6401b193450d9e67db2f3d3dbbe10/jodazelevilamojeragi.pdfIn PDF document text
    • http://101-games.ru/images/uploads/files/xajozetib.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160a58c9db9011---17988862289.pdfIn PDF document text
    • https://immobiliareincentro.it/allegati/file/21649296041.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/37062399115.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/58933699125.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/69663244040.pdfIn PDF document text
    • https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/54061821173.pdfIn PDF document text
    • http://cesurmakina.com/userfiles/file/27924953447.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=solucionario+de+geometria+plana+y+del+espacio+de+calvache+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d64b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD64B 18240 bytes
SHA-256: bf0872e8196c5f0f7cbcbe2d8b84c2b72714b57ed21e6a55246f1c0527237443
font_02_sfnt_off0001045c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045C 11424 bytes
SHA-256: 91df2439107f75b5efcdd9c3762c8d43d152635288721738efe7b687edad3c60

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