Malicious PDF — malware analysis report

Static analysis result for SHA-256 23954219c80e0840…

MALICIOUS

PDF

73.2 KB Created: 2021-09-26 01:51:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9c6f64f5cc7a3405fecfa6fecbfdf2a0 SHA-1: d439d6cafa1fee515fd8bfc8751eafce1e2afb31 SHA-256: 23954219c80e0840532c0b2957bd203bc5190e10b69abbaba0059ee2f151e618
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for initiating malicious actions within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://drafthe.ru/uplcv?utm_term=what+does+problem+parsing+the+package+mean PDF link annotation
    • https://tonymusic.se/UserFiles/files/64587446482.pdfIn PDF document text
    • http://biaikatolikus.hu/files/file/nezoboduzozaxovozogeb.pdfIn PDF document text
    • http://capitaldanceacademy.com/userfiles/files/82186142553.pdfIn PDF document text
    • http://studiotecnicodama.it/userfiles/files/delimajomuxipezotujev.pdfIn PDF document text
    • http://life-homeshop.com/asset/uploads/files/95770108746.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/16435688887.pdfIn PDF document text
    • http://investin-khj.ir/ckfinder/userfiles/files/podunebowoxebe.pdfIn PDF document text
    • http://www.performhabitat.fr/bundles/astadmin/js/ckfinder/userfiles/files/zefitonajowonukib.pdfIn PDF document text
    • https://thegioidongphuc.net/ckfinder/userfiles/files/33619591656.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/dupaguvosakexavajanit.pdfIn PDF document text
    • http://timavoshipsupply.it/userfiles/file/jodefedudizuvi.pdfIn PDF document text
    • http://rivebistro.net/ckfinder/userfiles/files/14408086631.pdfIn PDF document text
    • http://nakamurasangyou.jp/app/webroot/uploads/files/fonobujuvo.pdfIn PDF document text
    • http://petrovaskola.sk/userfiles/imagefile/93128551080.pdfIn PDF document text
    • https://yourownadviser.com/ckfinder/userfiles/files/43449099086.pdfIn PDF document text
    • https://vipbeachhouse.com/uploads/editor/file/7594374737.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133f63c63748---pokupexogikegozumimodinim.pdfIn PDF document text
    • https://hrmconsulting.biz/upload/files/71468969320.pdfIn PDF document text
    • http://herborgthailand.com/file_media/file_image/file/zajafifojax.pdfIn PDF document text
    • http://mh-gartengestaltung.de/userfiles/file/103249794.pdfIn PDF document text
    • http://xmzhj.com/UserFiles/file/videfibakeser.pdfIn PDF document text
    • http://speckrepej.com/upload/file/golulowolomiraraxinezuk.pdfIn PDF document text
    • http://erbaytag.com/resimler/files/51140081117.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_off0000b38b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB38B 11188 bytes
SHA-256: 958b218c17bf1c3e7a87e746da1ae9f90e77570dfceaca176a347e01f298f95f
font_01_sfnt_off0000cd15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD15 19336 bytes
SHA-256: b7c1241a1804f2ad14114057004dae642df9e5d91ec60b0175cfc4b266596e8d
font_02_sfnt_off0000feeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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