Malicious PDF — malware analysis report

Static analysis result for SHA-256 faa2c5e34d07829f…

MALICIOUS

PDF

117.4 KB Created: 2021-07-02 21:44:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 3461a00fb755a69d447ff806bb12071b SHA-1: b5cf405cdaef091f05c12b28f25816ac359f6a01 SHA-256: faa2c5e34d07829ffce5f0a196a4a23e6245edf53f06936682ce5493332f50fc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to lead the user to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://irlanc.ru/uplcv?utm_term=icse+science+book+class+9+pdf+download PDF link annotation
    • http://dioceseofniranam.org/userfiles/file/77469713464.pdfIn PDF document text
    • http://quanhoangtsi.com/upload/quangtri/files/25497442803.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f63843cb4d---lixudirimofesojukofu.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e4dd4e1a3---72760568327.pdfIn PDF document text
    • https://gerastar.com/userfiles/file/vogexatizezajofofiwipaxi.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607b07efad4e4---26067664000.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/wiguxebod.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/ungaggoksdb1gcga5b82nrms67/90803327336.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c155a73b80---juxosodejamigewewumem.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/16hoprh8b2f2bdlaesqsnt7otu/36860788835.pdfIn PDF document text
    • http://spalovnachemolak.sk/userfiles/file/manesabewaraz.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/0c70e73038cb800a420ed91bfc474a8b/21297037503.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c45d7a53772---93943538060.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607b16a04522c---nijovalu.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/117bf71665b67dd941c943ba64b74c15/banup.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/91387358496.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/d2f0d2d068724cd6f40d1f50c01ff6b8/16355286093.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/6b65hv2lk5n0bmeqn5to5knara/17084942275.pdfIn PDF document text
    • https://proektasis.gr/admin/spaw2/uploads/files/bebojojexitusazosudifanop.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/setixipumifamujikagovete.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/438a716f48526ca5cf98555571051a82/74112205122.pdfIn PDF document text
    • http://anaminfo.com/attachfile/file/xowumalubef.pdfIn PDF document text
    • https://activepymes.com/pub/file/vuxozoke.pdfIn PDF document text
    • 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_off00016af4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AF4 16816 bytes
SHA-256: f9b3e8bcfd7e1139e05885ac776653cdff1f6235d8ba2df31e482c8af2e8a494
font_01_sfnt_off000196ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x196EA 10852 bytes
SHA-256: d43c5523d98a8f6f4415e65abd1c1e893413caea77190372bccc2de6e6614604
font_02_sfnt_off0001aff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AFF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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