Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd45e2f90ade4140…

MALICIOUS

PDF

68.5 KB Created: 2021-09-28 13:11:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 0640da6becaa4d4aeae2b837b466a430 SHA-1: a2b309c082c560a1a29fd1b396c73c0ce1c1a107 SHA-256: bd45e2f90ade414095a6f42bdb5daec63ed034f8b9e1965d59988bd418569dc0
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating it's designed to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of embedded JavaScript (T1059.007) suggests an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://inwebjor.ru/uplcv?utm_term=x96+tv+box+price+in+pakistan PDF link annotation
    • http://sibaco.ru/ckfinder/userfiles/files/pesenewubevuf.pdfIn PDF document text
    • http://dioceseofniranam.org/userfiles/file/91393232597.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613fe04c71554---33785307885.pdfIn PDF document text
    • https://indolabtek.com/Uploads/userfiles/files/xuvibekufiwaliva.pdfIn PDF document text
    • http://atek-ent.com/upload/file/jeresuwefokuvof.pdfIn PDF document text
    • http://aiaato.com/FileData/ckfinder/files/20210907_26A711FB80987A70.pdfIn PDF document text
    • https://htapigroup3.com/contents/files/tovedagelesazivalurof.pdfIn PDF document text
    • http://podolsk-kondicionery.ru/upload_picture/file/89141936503.pdfIn PDF document text
    • http://nena-artspace.com/ckfinder/userfiles/files/wujodebutonazagumuxifa.pdfIn PDF document text
    • http://gazosilikatnn.ru/uploads/files/18992844165.pdfIn PDF document text
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lurotigogusurefowusu.pdfIn PDF document text
    • http://shbaicun.com/userfiles/file/2021092302071473499.pdfIn PDF document text
    • http://studioprogettoarchitettura.eu/userfiles/files/70290881685.pdfIn PDF document text
    • http://www.salpasafarit.fi/tiedostot/files/46797885772.pdfIn PDF document text
    • http://guidesdugrandlarge.fr/images/import/file/zofegoleruw.pdfIn PDF document text
    • https://santechnikosdarbai.lt/images/files/genig.pdfIn PDF document text
    • http://letresorellebio.it/userfiles/files/buvaxevoga.pdfIn PDF document text
    • https://kermanrooz.com/img/files/50522865705.pdfIn PDF document text
    • http://www.park-seversk.ru/other/js/ckfinder/userfiles/files/11279704309.pdfIn PDF document text
    • http://radyoislam.com/resimler/files/zurimak.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140c78b106a6---47343875385.pdfIn PDF document text
    • http://sowa-architekci.pl/userfiles/files/1992578189.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_off0000ad3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD3A 15144 bytes
SHA-256: c59e6420f0d93fb3241933cfa4042d3e8f5cfe00737862ec0b23f38a20787b6e
font_01_sfnt_off0000d2cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE6 11064 bytes
SHA-256: 4a907d1bd0301e3cf6ed335f151f37339010776a6e51547680d0a610e3fb5b32

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