Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9ed6aa3259db2fc…

MALICIOUS

PDF

87.4 KB Created: 2021-09-05 23:43:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ea3d22e1cbbf40153bb0da6b8b811da2 SHA-1: 1f4ee76de9973142110ed5c62515eefe5ee8deab SHA-256: c9ed6aa3259db2fc5672e9e8e36baedf84da5bad2935e57a1385355f15206e4f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to potentially compromised WordPress sites, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the structure and URL patterns are consistent with a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e52ca2dad---jutapanapuzibupovizamuku.pdf In PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/27325863889.pdfIn PDF document text
    • https://madopin.com/calisma2/files/uploads/6719871359.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/1ejbc654vdvt4g6u98k3dcidd0/niwodavirufuvepejimofazes.pdfIn PDF document text
    • http://iraneto.com/basefile/iranetocom/files/60460388078.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16073906f596c9---52424934450.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/mejomubowunuxokinal.pdfIn PDF document text
    • https://madame-tina.com/ckfinder/userfiles/files/67463463378.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609432fb5c79a---34260254741.pdfIn PDF document text
    • http://xz-brand.com/ckfinder/userfiles/files/43716536733.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0421463001623620709.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/25646020928.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a68f80a95d4---fututolasuna.pdfIn PDF document text
    • http://riggi.ru/userfiles/file/56785131232.pdfIn PDF document text
    • https://datxeninhbinh.com/data/dulieu/files/28174699163.pdfIn PDF document text
    • https://stockbauer.hu/uploads/file/newaxawo.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/7dc1858d99eea32253b0f657aba052cb/golopifoxira.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/06df9a81c0dd7428538d258ca48b14fc/75142811675.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/8l0pksjcl0505qjjrc0ntr25p0/kinagetigogakede.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607bca43e2cb6---ribasitolofesoxibajit.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080290386f19---lisijaz.pdfIn PDF document text
    • http://changrung.com/ckfinder/userfiles/files/kisedudurejaladuzujelato.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/h930m0tq5ora9liui2rokhcva7/xijutepogasogajoburez.pdfIn PDF document text
    • http://ansonseatery.com/uploads/files/dezovitovaruzo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=lynx+pole+saw+manualPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f33a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33A 17380 bytes
SHA-256: 1bf458f974daf16659d6f959658e00a6c0de4ca9c9d4ad25aae642ff27156dc9
font_01_sfnt_off00011fe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000137f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137F9 10480 bytes
SHA-256: 09bf4ce5c751e09acd34dad529ea07453f16e0a706e518e6634ac408e496c5a8

Open this report in the interactive analyzer, or submit your own file for analysis.