Malicious PDF — malware analysis report

Static analysis result for SHA-256 87460587bfbacfd6…

MALICIOUS

PDF

68.0 KB Created: 2021-09-29 06:01:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2de40e896993264c659f8bae2c76a9b2 SHA-1: 45b40c4dd5d9c6b6c4ae4bc0bc04f849f26d938c SHA-256: 87460587bfbacfd613606dcb7de801b6599f1694a285cf1ce6a3fc0e1501248d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely responsible for redirecting users to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://oniceh.ru/uplcv?utm_term=ok+jaanu+full+movie+download PDF link annotation
    • https://grupo.iberia.es/js/ckfinder/userfiles/files/11187727894.pdfIn PDF document text
    • https://incense888.com/uploads/files/202109120027286656.pdfIn PDF document text
    • http://jurabos.nl/include/editor/file/vatatexeworanotofateg.pdfIn PDF document text
    • http://maraulsan.com/ckfinder/userfiles/files/15746414036.pdfIn PDF document text
    • https://elnativocoffee.com/silver/upload/files/4485588818.pdfIn PDF document text
    • http://donghozibistore.com/luutru/files/54690458916.pdfIn PDF document text
    • http://111-orte.com/testarea/cwsCMSlight/media/files/vuwavidemezegivivakefata.pdfIn PDF document text
    • http://hertzlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fopudalazogixiwa.pdfIn PDF document text
    • http://vagtteam.dk/userfiles/Files/12380281821.pdfIn PDF document text
    • http://novo-foto.ru/ckfinder/userfiles/files/2289409266.pdfIn PDF document text
    • https://pmcp-avac.com/files/upload-ckfinder/files/30366102881.pdfIn PDF document text
    • http://www.cpnatacao.pt/backoffice/ckfinder/userfiles/files/tizulapemitabopivaz.pdfIn PDF document text
    • http://netart.hu/userfiles/file/32732297625.pdfIn PDF document text
    • http://cansuyu.org/resimler/files/besixivujubazezixeloxuzu.pdfIn PDF document text
    • http://eastindiaspray.com/suvra/eastindia_spray/files/92142492402.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/31046736283.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/penixoma.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/kizomurarofonix.pdfIn PDF document text
    • http://fillaracingacademy.cz/ckfinder/userfiles/files/73132460025.pdfIn PDF document text
    • http://elateridae.com/images/FCKeditor/file/rusudepeb.pdfIn PDF document text
    • http://angelofthewinds.net/ckfinder/userfiles/files/tufokawalazafelexow.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161339c2170df3---kenujupoxubofupenawixo.pdfIn PDF document text
    • http://avision-italia.com/userfiles/files/14254886973.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_off0000ad92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c5a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5A4 14580 bytes
SHA-256: 2eee44065b02f9e112732f3592408b80272054674e74ad5d8941c3140f4aff82
font_02_sfnt_off0000ea69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA69 10648 bytes
SHA-256: a2c93eb95f56018fa455399d6eac4b39677f76da50ef59e0cdcc80e4c2f9019b

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