Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7ff477352a62005…

MALICIOUS

PDF

144.0 KB Created: 2021-06-01 06:14:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00818c219ecf1d2bddb22b33be07e156 SHA-1: 58f0e98e2b797342b3cc8179a74fbdca38d8a691 SHA-256: b7ff477352a62005bd1c9dd1305567c039c4ff84b878583f0932b055f24d7c3b
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious redirection techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1608f682ed7054---35215146060.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/d8bf04bcca177918c60fba1c492eef74/24229468141.pdf
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6066976f4---xarosuvatedewupu.pdf
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/efef074c3aafbf01e778ed507cd15662/672501708.pdf
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/2c8b5ca9d3216a4c490ebc4fd1926f18/41353663085.pdf
    • http://allprintusa.com/admin/images/file/65932500962.pdf
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/0d293db83db08374a54a7f11594cecfa/rekutepevob.pdf
    • https://alrukn.co/userfiles/files/velumeparonuvudozif.pdf
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6227cb83f8---kekidu.pdf
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/bd9c16609c105c5cc4d0f7da6da69e2d/dumuwunevuwesebuneku.pdf
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/f0vnronnj4v9g2dn5jbgnj39n4/xosajobo.pdf
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/f90a0fed0ac5ed367096b38b47e783a9/buxetaguvabikiwafu.pdf
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c782ef765---76206873901.pdf
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/32ee596dd556d3cfad7487a7e29f7c30/41519543426.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e8539b421a---ririjiwanajopetebolepopuf.pdf
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa670ba13f---jisunigozikutobexabafize.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=libro+de+geografia+de+cuarto+grado+de+primaria+resuelto+2019
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e80e.bin
80c504ef340f0cfeae454a2c959ab959afa792803fff247b03286e7b0d9a3669
pdf-font-stream PDF embedded font (sfnt) at offset 0x1E80E 1792 bytes
font_01_sfnt_off0001f0b8.bin
891d75ca6c918a854096c56f2e8df5acfc9e328eefa3898794702cc2f334d27f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1F0B8 6036 bytes
font_02_sfnt_off00020533.bin
8d93e81be10e4a53e99b1c9388c778207e5372bd301980acf94d77280338f7a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x20533 13552 bytes