Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccefbc9b111149ef…

MALICIOUS

PDF

76.4 KB Created: 2021-09-05 05:09:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 67b2c38712422fb2671c9e7cb47de895 SHA-1: 6d5a663cd6bfcb1f7c95d221b671d3eaea7c099d SHA-256: ccefbc9b111149ef88fde6c868341088a31177bbf4eb509a570ceee90ec95abb
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous external URIs and is identified as a link farm, with many links pointing to compromised CMS upload storage or disposable hosting. These characteristics strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9962

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 https://nomylo.ru/uplcv?utm_term=cours+de+phytotechnie+speciale+pdf PDF link annotation
    • http://barnesfamilyconnection.com/clients/f/f3/f37d50667a1bb99e511e26172889fab9/File/mebenirobaroxaz.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/37mjb62nacg3sp8s7l9o39v16n/tilenuzi.pdfIn PDF document text
    • http://verkaufs-akademie.com/userfiles/file/dujexodanudokefeni.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c87f06298f0---xizixubowuzagokudim.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/v0lj6p1378j9sggevjn2r2jv9t/verejusiruwojir.pdfIn PDF document text
    • http://ms-beauty.com/ckfinder/userfiles/files/dofuka.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608adc54a3b10---8128200635.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d64b270992---11868526321.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1407e4691f---98390761357.pdfIn PDF document text
    • http://toyotarent.kr/FileData/ckfinder/files/20210718_04B81BB0AFBA4AE5.pdfIn PDF document text
    • http://littlepearlspublishing.in/data/eimages/file/nogenuzezer.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/1660fcb2f992f426d0c603c96a0517f2/dasumafegaxifejubijawas.pdfIn PDF document text
    • https://getadoc.in/ckfinder/userfiles/files/79919293584.pdfIn PDF document text
    • https://next-engineering.com/userfiles/files/91541211343.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/161051afa44e83---32246555603.pdfIn PDF document text
    • http://www.morrisjones.co.uk/EditorImages/file/ravilolezinifomotagav.pdfIn PDF document text
    • http://dalnoboy.org/data/filestorage/upload/files/wiwurozaxojikosujoviz.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/ccktesmee3u31lgi09bhaavomu/27845460427.pdfIn PDF document text
    • http://bananamusic.tw/uploads//files/202108111229115440.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1611387e89ac1f---rukisawunofalewafijezufi.pdfIn PDF document text
    • http://samnakthodrahassob.com/userfiles/file/89498452385.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/b93730426776e3966dd8ad6edf091069/82906246366.pdfIn PDF document text
    • http://grupophi.es/uploads/files/40849829289.pdfIn PDF document text
    • https://dichocungtoi.com/userfiles/file/sidolijewaxi.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/435198cc444c976817bb236ab54ad181/2714913040.pdfIn PDF document text
    • 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_off0000c0d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0D2 10960 bytes
SHA-256: b58126a2e51a7c7995561125c9c1929ed7b6efddec5d3c78acb8cb850285318c
font_01_sfnt_off0000da3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3B 18676 bytes
SHA-256: 3e29973200a270feba783bb2e49e99e9a10a2dc794c663d394e7dc443c2c2044
font_02_sfnt_off00010a59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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