Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ceb70a5a2d4e322…

MALICIOUS

PDF

75.6 KB Created: 2021-09-17 17:38:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c715edd3012c28118eee5b4993a231d8 SHA-1: 7fe37a4c55525d8b9b701f19407a166c7f359604 SHA-256: 7ceb70a5a2d4e322685e85f1cd13224f6b63c22bf9f44c5447cc6265b5c62cb3
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, with one heuristic specifically identifying it as a 'link farm on disposable hosting'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution by redirecting users to external sites. The presence of embedded JavaScript suggests potential for further exploitation or obfuscation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://garglob.ru/uplcv?utm_term=battlefield+of+the+mind+ebook PDF link annotation
    • https://priscar.com/documents/files/gisatatebeko.pdfIn PDF document text
    • http://transgusto.ch/userfiles/file/29558942464.pdfIn PDF document text
    • https://tectrongim.com/uploads/files/64199931699.pdfIn PDF document text
    • https://enerjimakine.com/tsrm1/img/userfiles/file/nefuguralike.pdfIn PDF document text
    • http://colorsoftexas.com/ckfinder/userfiles/uploads/25542956956.pdfIn PDF document text
    • https://emprenderem.cl/files/memovinotel.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/50812562435.pdfIn PDF document text
    • https://www.liftechforklifts.com.au/application/third_party/ckfinder/userfiles/files/bubagoral.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/fatilelofas.pdfIn PDF document text
    • https://habibitoursegypt.com/ckfinder/userfiles/files/97760155298.pdfIn PDF document text
    • https://ratoempat.com/contents/files/46214305904.pdfIn PDF document text
    • http://fairbank-ia.org/admin/ckfinder/userfiles/files/69732840210.pdfIn PDF document text
    • https://hantverkarenisandby.se/UserFiles/files/13899634740.pdfIn PDF document text
    • http://regimhotelierbucuresti.com/images/userfiles/dozaxozusozusupuvavo.pdfIn PDF document text
    • http://tobn56.com/UpFiles/file/bolefawuzigudejetup.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16135108bed1e8---70851351334.pdfIn PDF document text
    • http://j1ent.com/userfiles/file/20210909065146.pdfIn PDF document text
    • http://yonseri.org/userfiles/files/50573728434.pdfIn PDF document text
    • http://jts-electrical.co.uk/ckfinder/userfiles/files/61378083815.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/kabawelirizopoke.pdfIn PDF document text
    • https://perfecthospitals.org/FCKeditor/file/vewupataduzidofixogapok.pdfIn PDF document text
    • http://spbmedax.ru/sites/default/files/uploads/mebivar.pdfIn PDF document text
    • http://www.huescalamagiaenfotos.com/userfiles/files/novoponiwelolevixosemifux.pdfIn PDF document text
    • http://cardealer-space.com/js/upload/files/1274206850.pdfIn PDF document text
    • http://togclick.com/media/userFckfiles/file/waduvaxafofina.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_off0000c6ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000debf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBF 16292 bytes
SHA-256: 99c6c2224b9625d3d760626fd318cbe71b82413077d4882d15f092f48431989b
font_02_sfnt_off00010905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10905 10636 bytes
SHA-256: d9fb4fe911d85bf05b51457661c3f34f99ed233b12f9eaddf4ab7090a7622417