Malicious PDF — malware analysis report

Static analysis result for SHA-256 94e82f6cef133471…

MALICIOUS

PDF

86.6 KB Created: 2021-06-26 18:57:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ffd781f26d3db36d32cac9e0437e361b SHA-1: c1e299295120a7210897131bbbec7d0da3e5c50f SHA-256: 94e82f6cef133471ae866c1d8d2e46e63d869dff5329f9a0132c3cddf3cd5ba0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and is structured as a link farm, likely designed to redirect users to phishing sites or download further malware. The presence of multiple compromised CMS upload links suggests a tactic to host malicious content on seemingly legitimate but compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://wastran.ru/uplcv?utm_term=flight+paramedic+salary+by+state
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/5a144daab54fdd255fc90c4c3072461d/najiterijatoxapatoziw.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/ebaceb698d350e6e20aa821eb171b1db/13605566480.pdf
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/jimadomugebuxuwop.pdf
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/21cd77a213cdb9ef9fffb09360af55f7/tibixakinadujag.pdf
    • http://bvsaigonbinhduong.vn/uploads/files/xalikukakaxoreloraxixo.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c700415a8f---45532294358.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/baef63a7613c48432152fd1c11563a52/63685118920.pdf
    • http://burchiellati.com./file_fck/file/rexakusob.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2438b7f5f4---89573057485.pdf
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/tvd3b7dbj03octhd49bk8u92j4/pebeno.pdf
    • http://strandedtattoo.net/file/xezexasow.pdf
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16093afc478f9a---64945954753.pdf
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/fa9c58780740d158cb050694986148ca/kuzatosuj.pdf
    • http://md-servicios.com/userfiles/file/77026345866.pdf
    • https://eobliecky.sk/userfiles/file/fenigokixikel.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/3a3fdfa5f51e39d7ba94c437474bf787/88337633255.pdf
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/hgda1rv22i5vq331hjvdek6cj7/fipojitofukiv.pdf
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/td161ta7l63ne74c0rhoofd776/22631285743.pdf
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a39b0c36f82---95194247527.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c728bcec5---12910404021.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078df2f46c2c---24268444426.pdf
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ced3f140557---2178062009.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abdd2ed0165---91434918872.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16076064d8a14f---93062143994.pdf
    • http://ukrainski-rosyjski.pl/userfiles/file/lojagit.pdf
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/920f728c2214d692008eaaa24b10d029/gopuzazaxakarurinu.pdf
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efa2.bin
127c43a1efc4a90bee644194f1efc0e0b50ef7c100a05e4660b396cd6732821d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA2 10968 bytes
font_01_sfnt_off000108b1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108B1 16792 bytes
font_02_sfnt_off000120c3.bin
7287ab8f7512017b332bb13c8e5d6a0a36becafe773cd4a3c0e2472fb8eb542b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x120C3 16824 bytes

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