Malicious PDF — malware analysis report

Static analysis result for SHA-256 c76fb6ed084294a2…

MALICIOUS

PDF

92.1 KB Created: 2021-08-15 10:02:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e7b719f2f8ba0ee81bfd965b9dd98f76 SHA-1: 0295e667036843277fe4dd6045970856ebd47f39 SHA-256: c76fb6ed084294a2e1bab6f1f9c0a5a1537348f6f2690e1d3a965f24203dd08a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The primary function appears to be a link farm, leveraging compromised CMS uploads for hosting some of the redirect targets.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://n2nnetworks.com/files/others/nomubemewemaxu.pdf In PDF document text
    • http://infrabud.eu/fckpliki/file/lusevomedizezozitesux.pdfIn PDF document text
    • http://www.pilartangguh.com/file/deviruzudijatobirip.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///ziduwizobirik.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9611b5af3---dexada.pdfIn PDF document text
    • http://oakgroveschoolheritage.com/clients/b/bc/bc5c94904a1f00f1300372e6f875146f/File/76088123745.pdfIn PDF document text
    • https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/niregeli.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/tptkj1g16vsa70a0dhg3jt0lh0/11314201015.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/89188705116.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/157072828b2cabe05955bcb5aa6d6eeb/66567599751.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/712e377358ed6eee45abc0f80f83559b/xezoxudujin.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/fubcdrkn2q9cp15iuv3vki1ush/majanitezutukagufoxipeba.pdfIn PDF document text
    • https://groupburuemas1.com/contents//files/14468665529.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/porulipo.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/lofubi.pdfIn PDF document text
    • https://chuyennhakienvangvn.net/upload/files/97008170647.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/bukusajikewager.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/0d3461821476ac6c2df8001211309693/meketigevevasurajobiv.pdfIn PDF document text
    • http://sam-global.ch/files/file/60339397496.pdfIn PDF document text
    • http://lhs75.com/clients/46937/File/batujifurigazowa.pdfIn PDF document text
    • http://entryexpress.online/chapter_images/files/muvekexowesefoxovaje.pdfIn PDF document text
    • http://gsprojekt.eu/userfiles/files/4177050293.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/sawawoxojebujelejew.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/6f1a3ddb92e26ee4eb8692a07c5482e0/55020461327.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=plants+vs+zombies+garden+warfare+ps3+trophy+guidePDF 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_off0000f562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF562 20648 bytes
SHA-256: 4886cef710651351230618900d00f2e92aefa78d0d7f6612913c1502013cdd9e
font_01_sfnt_off00012c1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14434 11684 bytes
SHA-256: 7066be18e40dfd35e1c7ad34101a673fedb1327ccc12689da3f99d1a9b2728a7

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