Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebeee82323ce912d…

MALICIOUS

PDF

93.4 KB Created: 2021-07-25 06:04:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c324f03750cded16b22b1a4fe68ed1a3 SHA-1: e79a4ebf5a8d66ca1c83d5e4baccb41e5fd43926 SHA-256: ebeee82323ce912dc62cae821fabf7bafe1f4b7df11d387b30ffe38b8c83783b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to numerous distinct hosts, many of which are associated with compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the structure and URL patterns suggest an attempt to lure users to external sites, potentially for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccaba333c2---90984927284.pdf
    • http://isagenixmakessense.com/ckfinder/userfiles/files/94599156395.pdf
    • https://cfbadalona.net/ckdata/files/5012870177.pdf
    • http://22743333.com/userfiles/files/dalatupaferozine.pdf
    • http://poiskvod.ru/images/file/wetipewo.pdf
    • http://www.alexgis.com/siteuploads/editorimg/file/nesifojelutonov.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eac110d7fb---ripukimasawat.pdf
    • https://warungmimpishio.com/contents//files/kawaxowugesoperetijisawub.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5b9c471b63---65123669272.pdf
    • https://lionkingbali.com/uploads/file/xilofapajiti.pdf
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/cc0b7391d8f04b33dc3e8513708a8bab/filuxurumilamezovoz.pdf
    • http://raylutickenterprises.com/userfiles/files/piwejiwe.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160858a6763c42---76112199766.pdf
    • http://bestapp4u.com/admin/uploadedfiles/file/natawitanafem.pdf
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/82904477629.pdf
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/9b765a8fe87a4c07581342251b4e5bbb/40709740213.pdf
    • http://hf1968.com/clients/48820/File/4919681230.pdf
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/d00ff91ee925fe12d722172d0885a37b/91128307892.pdf
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/jp8pmscc69qhu5h0h1agj6t6d1/zugogixoxuxotagodobasaw.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/86c16b9dd9809a0c7ec227ff6fa77aa5/kipokadop.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1606d552a7f02a---23183198837.pdf
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160e106c86f42d---totiwe.pdf
    • https://isosklo.cz./uploads/26625752443.pdf
    • http://farmaciafoglia.eu/userfiles/files/firinapabimepumifizeluj.pdf
    • http://ceskylakros.cz/userfiles/file/xijabukitepezozodubujuwo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+use+a+colibri+v+cutter
    • 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_off00010949.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10949 16792 bytes
font_01_sfnt_off0001215b.bin
2c605864211498a3565aabb15a424b529f5f05433086362945f5e98f15a31b62
pdf-font-stream PDF embedded font (sfnt) at offset 0x1215B 17120 bytes
font_02_sfnt_off00014e59.bin
578ead6da418bedbe6d5757c063ec7a0789481c97105a08a0a815d65c55e4c2d
pdf-font-stream PDF embedded font (sfnt) at offset 0x14E59 10504 bytes