Malicious PDF — malware analysis report

Static analysis result for SHA-256 32195e417d103375…

MALICIOUS

PDF

86.1 KB Created: 2021-08-18 06:57:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 36967a5f964beb6f88778c9beb02255f SHA-1: 70a7dc1e082ad9f7ef179fdff626d36bc7125ec9 SHA-256: 32195e417d1033750c4c71f2afd398fb0e163d9ebf8ac9e3e566fe42684083d1
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting domains. This suggests the document is designed to lure users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://websurin.net/UserFiles/File/46853802392.pdf In PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099afa796b5e---13352941501.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c6cde5514d9---57088475240.pdfIn PDF document text
    • https://cailux.lu/userfiles/files/xagoza.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/25774787513.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/5233f37adc110f4817902a6905147b32/lufajalofipudiwutid.pdfIn PDF document text
    • http://jonme.net/ckupload/files/tesajisagevu.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb17401a4f---wonavikov.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f3d9ee1513---widafulijemimonunobu.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/cd90986e6f2f00d7d5c2b3bff74a3f7b/79617308296.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/5d1c29123ebacd17571d215cf005a4de/fagabadetujasujazopef.pdfIn PDF document text
    • http://banphimchuot.com/userfiles/file/46196851799.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/ecf13faecd85ca09fcb8bef7dc654e90/rexezeresusebuwirub.pdfIn PDF document text
    • http://sosonomo.com/ckfinder/userfiles/files/20315994241.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1609eea06090ae---19784379608.pdfIn PDF document text
    • https://babamore.com/upload/ckfinder_temp/files/20210616094148.pdfIn PDF document text
    • http://momsystem.ru/public/file/9964033721.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1611c77c1b57ec---sunovumiduwixo.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8334f0e81---88344337595.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/b6b8cc047ee5a8bb8ff2453c4b8fa17f/76633860480.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/43978891337.pdfIn PDF document text
    • http://irths.com/upload_files/files/3668975923.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/lugemurevuri.pdfIn PDF document text
    • http://studiotecnicomartani.eu/userfiles/files/gikugitasikelizivogu.pdfIn PDF document text
    • https://xn--arbeitskndigungsrecht-best-5zc.de/userfiles/file/63094922061.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/9595085015.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+make+a+safe+stop+beepingPDF 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_off0000eb6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6D 17128 bytes
SHA-256: 3089fe0cc39683f6a2257b58dea4f8f6942f8e8ced1ecb71afdd0c92ced93afd
font_01_sfnt_off000117a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A8 10864 bytes
SHA-256: 7d769440241fa2d8bf4c83d5cc818dd3996af1a5f9a11778148b6fa97235f777
font_02_sfnt_off00013098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13098 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1