Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6e96d64d426040b…

MALICIOUS

PDF

100.3 KB Created: 2021-07-02 20:06:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ee25f2afe779648b1b12b94be455315c SHA-1: c1a6b4888e7de729d4e6f824054ea4df5e6d0ced SHA-256: c6e96d64d426040baebfa8cb1898bc4f9a959fbc708ed95a8ca92af52da956e7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it's designed to lure users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9681

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://chcial.ru/uplcv?utm_term=different+types+of+performance+art
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/d82b4c92731dfacbe027df0d1753db1d/bukafukajometupim.pdf
    • http://alituncer.com/userfiles/file/ninenonotisijapuziwevigu.pdf
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/0e7ec9ce76d4cfee837dec99101b9c59/72235284431.pdf
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae8d12ef2b9---74142000896.pdf
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/907b9175fe0171791205c0baebd32acf/95526763571.pdf
    • https://aannemingsbedrijfbarthulsbosch.nl/userfiles/file/87062954677.pdf
    • http://goref.ru/files/file/16691357664.pdf
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ac34de51c4e---45848738846.pdf
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/37513330120.pdf
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/190832153054c491f0d492361f4bb699/98134102205.pdf
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d45e2a5c3e---44663907144.pdf
    • http://billsky.ee/files/file/zategosixaxorofalap.pdf
    • https://tabularasa.lv/sites/tabularasa/uploads/documents/files/livatazafeboburapunubajuw.pdf
    • http://studiomanzella.com/userfiles/files/babodelunojekik.pdf
    • http://consulcongress.it/uploads/assets/file/80733244777.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607de05f40765---76766099849.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160afa247e0e0f---woviguxubalubusesa.pdf
    • http://www.ufolep-69.com/contenus/files/1337265167.pdf
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/q9av35pj9oojai7k5onsqd2o8o/rinevawamexawe.pdf
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/d5df443a5345c56cb1bb53201b1acd11/bepifadumupunerowi.pdf
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/cad4584892cb7478c4d27590eb1beba5/92010279207.pdf
    • http://ptaki.info/imgekoprojekty/files/88190483788.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b7438144a---11001700079.pdf
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098e8bfe962a---17869724765.pdf
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/jegam.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608fad1a312b6---71194624382.pdf
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/26o09861h81ru9fc48ete26t3f/xijeruvodugizezupikil.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011954.bin
3e6afe8fd0efccc2c5df39307285711942927954896d677291adfae84f495e7b
pdf-font-stream PDF embedded font (sfnt) at offset 0x11954 10712 bytes
font_01_sfnt_off000131f2.bin
e3c836c6fed8da5c19042dd724f0d887a590e3262bbad1625b69cd7526569ef6
pdf-font-stream PDF embedded font (sfnt) at offset 0x131F2 2364 bytes
font_02_sfnt_off00013c49.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C49 16792 bytes
font_03_sfnt_off0001545b.bin
f8de5d17efd99e0411522b8eae04e348a4097959ad87af96b43c3f951f40e49b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1545B 18020 bytes