Malicious PDF — malware analysis report

Static analysis result for SHA-256 829605bdb7a9d6b4…

MALICIOUS

PDF

113.0 KB Created: 2021-07-16 22:33:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 95c35f18443ee7fac9c253040da883ce SHA-1: e165ab97c2c0f14bc2812d3068aee75d94fb0bd8 SHA-256: 829605bdb7a9d6b4483d31f5d486e125e57b55fd129237341a9c1f398ab54392
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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://thepokeluau.com/uploads/files/riselebutufusepadufasuw.pdf In PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/01jpqscr43cu17k5e1n8kdu9bl/gejuxinijup.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/db87e607820421f8bf256b8a8556adaf/xujibimeposa.pdfIn PDF document text
    • http://chataphan.com/file_media/file_image/file/rikumilunaredu.pdfIn PDF document text
    • http://exito-opakowania.pl/userfiles/file/74078351400.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160e815a50b785---26625276035.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/e69921421c985e495acb847b2c760283/74654246104.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608107c444565---95870647738.pdfIn PDF document text
    • http://bbmeti.it/userfiles/files/74958385423.pdfIn PDF document text
    • http://pho32shabu.com/uploads/files/47180036459.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d0cce915b---rejidojosorekuxipobira.pdfIn PDF document text
    • https://brianhigbielaw.com/UserFiles/file/96326421480.pdfIn PDF document text
    • http://pune-india.info/userfiles/file/89979408875.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/21742127141.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b31830d98---90589222162.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/eabe4ed01dffac5733ae8eb0bab7a1bb/tanikamurudi.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/j3u9lrpqua0i9lu5a799g77gce/rotowelotanokomefeno.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/cslbqe5i9kee6n5vt712mk5p2v/50873251447.pdfIn PDF document text
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/2b7eb078710caf8578188c5c8098939f/61547837048.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160be07541faf5---17942395890.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/19199163894.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/907c725332c195918d8fb87ab399780b/taveg.pdfIn PDF document text
    • https://llsindia.in/FCKeditor/file/fixinekosebev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=first+national+bank+of+granburyPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000158b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158B1 17352 bytes
SHA-256: 49ce01de1d2ad70eaae90aad305952386b52ccfb87c7759aff7a9c300a1def6d
font_01_sfnt_off00018627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18627 10680 bytes
SHA-256: 0e10a9bbc1b8f6b55de452ffb0f5c5587076da4767b25cbe9bee43235f2712c3
font_02_sfnt_off00019ecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19ECB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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