Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0f65dd59e03a1fb…

MALICIOUS

PDF

92.2 KB Created: 2021-09-07 15:38:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c02cc128f9fc19a89ce9df93a09aa007 SHA-1: 3c5baf0d811ea50f270c75df5c49a839df59c9ae SHA-256: e0f65dd59e03a1fbb2418e27c3623c8bb2c9005449a855ff525074ada0467bc7
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites hosted on compromised or disposable domains, identified by heuristics like 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM'. The ML classifier and ClamAV also flagged this file as malicious, indicating a high likelihood of it being used for phishing or distributing further malware. The embedded URLs suggest an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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 http://livelyway.com/ckfinder/userfiles/files/13209826346.pdf In PDF document text
    • http://scsytech.com/upload/files/bitotulagog.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/058a8e1bb4c36357d73d0981378c393f/zokitugedigijuvewebosuj.pdfIn PDF document text
    • http://emekyesiltepe.net/images_upload/files/40569371689.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a80ca7d19---limomu.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/c62045f6de562a9f40a3538478cd1965/zogobudoxe.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/in4efk9v9adojcahjkon0dgdu3/86733684745.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/dcc367669c0d51ef93e243b80825a99e/xojivida.pdfIn PDF document text
    • https://qualitygums.com/userfiles/file/85864017546.pdfIn PDF document text
    • https://mandarinusa.com/userfiles/file/1626214918.pdfIn PDF document text
    • https://langestrand.se/anvandarbilder/204/files/24115867885.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8c232886e---32007693240.pdfIn PDF document text
    • http://imi.vc/upload/files/17246189639.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bab1b18140---fikupix.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/ic39mr3u4640ndhaqb5tb9763p/30816748331.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/681c169c0b30173e6ede81276b0fb210/mugikozonekaz.pdfIn PDF document text
    • http://sakurahoaanhdao.com/webroot/img/files/95483518611.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/6e2363e361b5730128931e8c88214284/63586846249.pdfIn PDF document text
    • http://studiotecnicoprato.eu/userfiles/files/xafafilumef.pdfIn PDF document text
    • https://verticala.ro/images/userfiles/sigiximuvadozu.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aaaa57b04f---88304502038.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/73011047112.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607824b9e1762---vovuxebumibepuze.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/l87hnofe1ue8fovoo3n7elmfn7/dasedopawilusiwejupe.pdfIn PDF document text
    • https://luminex.pl/upload/file/vejotorixasado.pdfIn PDF document text
    • http://ranahytta.com/ckfinder/userfiles/files/moxekimadizizo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=leadership+styles+pdf+thesisPDF 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_off00010493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10493 17952 bytes
SHA-256: 8b76cf31e7527875dd1de5c512127fb5ffad95529eb407e542472d3c42119d7e
font_01_sfnt_off0001331f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1331F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014b36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B36 10440 bytes
SHA-256: 493439c8b40d61145713642412e526d6e79538dd18c307a67e6edb9e883b011d

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