Malicious PDF — malware analysis report

Static analysis result for SHA-256 444f41ccd83302e6…

MALICIOUS

PDF

68.3 KB Created: 2021-09-20 01:58:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 80f860dced21114272c1e97316f58288 SHA-1: b62785c9a646a61d57730b2d9766c2c52d7e6cd8 SHA-256: 444f41ccd83302e65fe52a4eb5f851e33825c4fad9602df20b61cec7bf7904c4
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many of which point to potentially malicious domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript suggests an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://architettosirocco.it/userfiles/files/poxotuxejebe.pdf In PDF document text
    • https://bloomland.com/sites/bloomland.com/files/15900939678.pdfIn PDF document text
    • http://ekhoron21.mn/uploads/files/nopazuwoxekif.pdfIn PDF document text
    • https://aquaprosmart.com/userfiles/files/73941273677.pdfIn PDF document text
    • https://titishop.co/upload/files/zemufuwi.pdfIn PDF document text
    • http://alburigiott.it/userfiles/files/tusiduxijurawazu.pdfIn PDF document text
    • https://afritransport.com/app/webroot/files/file/47255629297.pdfIn PDF document text
    • http://safeabortionnepal.com/userfiles/file/45035397407.pdfIn PDF document text
    • http://sapientgenerator.ru/files/userfiles/files/9760268525.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/161364d7f4e6b6.pdfIn PDF document text
    • http://nomorecpapmachine.com/userfiles/files/wirivavora.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/1103835734.pdfIn PDF document text
    • http://nessium.fr/userfiles/file/pamiwenos.pdfIn PDF document text
    • https://rheinfurth.de/userfiles/file/9291385754.pdfIn PDF document text
    • https://kozhikodedeaf.org/admin/my_files/file/verumejufeb.pdfIn PDF document text
    • http://asude.istanbul/ck_images/files/nabafametemiji.pdfIn PDF document text
    • http://kangshi-you.com/uploads/files/202109090004218791.pdfIn PDF document text
    • http://www.likoda.com.tw/upload/ckimg/files/vabisugi.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///86259826846.pdfIn PDF document text
    • http://eldmsh1.ru/js/ckfinder/userfiles/files/zukizavetu.pdfIn PDF document text
    • http://dhleisure.com/ckupload/files/25365359013.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=gta+5+online+money+hack+ps3PDF 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_off0000adb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADB0 14692 bytes
SHA-256: 41583ee02fd05eb98b1ca69e1d74d6f8f6d1ef91d319dba96278dd620eec4e80
font_01_sfnt_off0000d247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD247 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ea5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5E 11088 bytes
SHA-256: c06954abbd2a7e454fb2a1bb98ee687f5129861a2c915e3cb62c6d233b4c07aa

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