Malicious PDF — malware analysis report

Static analysis result for SHA-256 e369ecc994e7cc48…

MALICIOUS

PDF

130.8 KB Created: 2021-07-02 07:23:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 3ce7dbd45ebc2757450c472a7b7d0cc1 SHA-1: 0cec7fbb9d9e501e2e08e3165455dc1749c1a0f3 SHA-256: e369ecc994e7cc485ef3157b7abb713c1c6fe37d19fe131600323b1ca8bde130
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as containing a link farm hosted on compromised WordPress sites. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. The embedded URLs suggest an attempt to redirect users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9845

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://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/02c34505014bb71db705729cd8c77b63/93367766798.pdf In PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ea2d8a7d05---gizuxudalezazoz.pdfIn PDF document text
    • https://brod-plovdiv.com/images/wabosupodufugesubeni.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c09a1c1db---77807910554.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ff159ce9b---zonagonujebo.pdfIn PDF document text
    • https://ckmusicdesign.nluserfiles/file/lalaxeve.pdfIn PDF document text
    • http://www.emailposte.com/pictures/tujiwevami.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/24f27224f358959c5ff8e9673201d959/bupikexaroguzaja.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d5f339b5e3d---metib.pdfIn PDF document text
    • https://plagij.at/ckfinder/userfiles/files/norupavokesunozab.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/jelofitavibebid.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/niwixijazisojogod.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///fawineburoji.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/kt1u8h98p9tkmgh4mhgh91f466/nuwodudotojujuf.pdfIn PDF document text
    • https://prestinieurope.com/userfiles/files/zoxirozidusaximusig.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/xatazidijiwatebutu.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b577636239f---3720794878.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/eobq81gjrdt4t9fmh2botqt5db/97274489703.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607be83c7ef68---viwoja.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160775afe1d0f1---zomiriv.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/010626111476.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b62327ba7da---tudadu.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608d85cd8340d---9329112658.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/6e566d344be320b58a66bbe3a00d8ccf/pajituzebuso.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/fedozefuxos.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/167441434.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=snow+fed+rivers+meaningPDF 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_off000199e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x199E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001b200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B200 10780 bytes
SHA-256: 253bd5982030c6e651cf86b5f1aee2f5f6d38a9a5782683b173a341aea883406
font_02_sfnt_off0001caa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CAA6 19816 bytes
SHA-256: 9c862849817d4aa62d7d27224023fcf7410ff79c4cd9fd2f765f5163c6e93bd2

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