Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe2c4e6a6cce8c07…

MALICIOUS

PDF

91.2 KB Created: 2021-07-21 01:33:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1818c3c931fca8bc5285f35622b0beb6 SHA-1: 8f6825e64eead2dee659596d8b978f8185140658 SHA-256: fe2c4e6a6cce8c077a6d82068239624f66f3003d8531cd40bcb3e81e24819a32
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to external sites, including those hosted on compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious content or phishing sites. The presence of a link farm on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://valstybestarnyba.com/upckfinder/files/wukudox.pdf
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160acaad73b3de---puvixubig.pdf
    • http://campfirewtx.org/userfiles/file/vepovisaf.pdf
    • https://alkalacarservice.com/public_html/userfiles/file/62339049270.pdf
    • http://rittenhousereunion.com/clients/a/ad/ad7d26974070b67854a29702aed78614/File/80846661790.pdf
    • http://wsm.hk/images/uploadfiles/file/11810488351.pdf
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/60m3jkkkt3fujk0oi8cvl6dfat/rejoradozumezilewozawataf.pdf
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/05b35b1ff1c7fa7fd21fb199c99dedad/76099408719.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073726f285fb---waziximirowipoze.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16089a040ba4df---disusu.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c110e19b6de---67468390754.pdf
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/34365619.pdf
    • http://fkhd.cz/data/img/vipes.pdf
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2421c21728---mopakinonifas.pdf
    • http://atonoserver.com/userfiles/file/bojifuvifekurubi.pdf
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/ff0ca095b8c7608af383e3aa1bd7eef6/72415665600.pdf
    • http://ccswcd.com/userfiles/file/50647477238.pdf
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af9a0f75fee---zugado.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861af9279e9---refuposorivadisi.pdf
    • http://rapet.hu/files/16190398315.pdf
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/625ccb85445df7230ce76183073e52ad/lugokofamarifejudida.pdf
    • https://uclerbaklava.com/resources/file/xozaxuwimibonabi.pdf
    • https://aneri12.eu/res/file/5913104910.pdf
    • http://nitexprofi.cz/userfiles/file/kilidati.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=the+favor+of+god+jerry+savelle+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_off0001017f.bin
b6ccfef58bae0fdc6de78565582fdb3c124a1db69365211e6659b3c99fe32de6
pdf-font-stream PDF embedded font (sfnt) at offset 0x1017F 10756 bytes
font_01_sfnt_off00011a37.bin
3e9a5f5f79018b7b64d1d2709f7c37369b307d6eba730b2f81ccc7f91ec741ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A37 17424 bytes
font_02_sfnt_off000147b8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x147B8 16792 bytes