Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e144e3c117cf8c5…

MALICIOUS

PDF

70.0 KB Created: 2021-09-11 21:28:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f5e10324e761ea27d2c424fbd7fc07b9 SHA-1: 24752ca22d9bb4fbbcdfc11fb88297129a4d4e5f SHA-256: 7e144e3c117cf8c517207012285cecf2845c604378535f06e2bb3e89ef75faaa
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, with a high-confidence ML classifier and ClamAV detection indicating malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests the document is designed to host many links on disposable domains, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://thefertilizergranulators.com/d/files/69644010334.pdf In PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161371abef20f2---lilunitekekutukegexok.pdfIn PDF document text
    • http://jiehuist.com/userfiles/files/88692451529.pdfIn PDF document text
    • https://equinox-e.com/upload/files/zabisix.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135e9d13865f---fumisirimobozak.pdfIn PDF document text
    • https://aspit.ro/imagini_ws/73490387441.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/vomisawumozitekivipulo.pdfIn PDF document text
    • http://yokohama-model.com/userfiles/files/94006480542.pdfIn PDF document text
    • https://hkparkkonutlari.com/image/files/42632870958.pdfIn PDF document text
    • http://ergakiland.ru/files/files/73566022240.pdfIn PDF document text
    • http://esangsok.com/upfile/files/lawojet.pdfIn PDF document text
    • http://hangquangauto.com/files/23017047966.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/dinal.pdfIn PDF document text
    • http://fujieshubao.com/zk/UploadFile/file/2021090122481373499.pdfIn PDF document text
    • http://muszempilla.com/files/file/62518858981.pdfIn PDF document text
    • https://mimpidia.com/contents/files/1481349344.pdfIn PDF document text
    • http://itfkarnataka.com/cvsprojects/SSK/Source/2.0.0/images/files/divujefapozu.pdfIn PDF document text
    • http://gold-carsales.com/js/upload/files/73670141445.pdfIn PDF document text
    • http://nhahanghienminh68.com/upload/files/92849027617.pdfIn PDF document text
    • http://fantalife.nl/userfiles/file/25573440222.pdfIn PDF document text
    • https://bk.knu.ac.kr/ckfinder/userfiles/files/pesenexatosufojutesuma.pdfIn PDF document text
    • https://moraure.net/js/ckfinder/userfiles/files/kufafukapopufibunoded.pdfIn PDF document text
    • https://eastoncn.housemember.com/uploads/files/subopeforewuguripiliwaz.pdfIn PDF document text
    • http://cyklo-sport-servis.cz/UserFiles/File/26599398404.pdfIn PDF document text
    • http://idcla.net/upload/files/jajilega.pdfIn PDF document text
    • https://almentispharma.com/ckfinder/userfiles/files/fufewasob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=screen+recorder+with+audio+android+appPDF 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_off0000b5ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cdbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDBD 14376 bytes
SHA-256: d06cca4728223844cfc37abdae76b3ae9c79a756b0b1ab66f950e7c88e963faf
font_02_sfnt_off0000f18e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18E 10660 bytes
SHA-256: 5da107d501377ba95dc801f63e0c99c2ba54df04f40ff0508014fc3a8e070934