Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd3d82689905b0aa…

MALICIOUS

PDF

83.0 KB Created: 2021-09-17 03:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 55ec4f95b9ecc4f647fe2fc458c2afec SHA-1: 49e014c83b576beb3864e39c784b6f348bb7d4ed SHA-256: cd3d82689905b0aa39cbbd1ada65153e2c82952b791ff5d013e5f204c35804f5
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 point to disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely used to facilitate the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://allytemp.ru/uplcv?utm_term=space+strategy+games+android PDF link annotation
    • http://tuanayapim.com/rsm/files/mulig.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/39527372741.pdfIn PDF document text
    • http://aptwash.com/userData/ebizro_board/file/toditejirafuvovosigadom.pdfIn PDF document text
    • http://www.almansori-ye.com/almansorifiles/files/sapifilenixuteveverevumo.pdfIn PDF document text
    • http://cuacuongiare.vn/upload/files/misamesemefafefenewuziwej.pdfIn PDF document text
    • http://studiotecnicoligioni.com/userfiles/files/90029749892.pdfIn PDF document text
    • https://demircanticaret.com/userfiles/file/vadon.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/64949891658.pdfIn PDF document text
    • http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xejizuv.pdfIn PDF document text
    • http://onthebroadway.com/CPD/adminpanel/upload/file/pezubovanobij.pdfIn PDF document text
    • https://styliststudios.com/imagesTE/file/roluvovazopavosadoj.pdfIn PDF document text
    • http://miskolciharsona.hu/pictures/file/dakaliwutajawe.pdfIn PDF document text
    • http://greenbrier101.com/userimages/fozubipuxipojiguset.pdfIn PDF document text
    • http://m3hotels.com/userfiles/file/38018524726.pdfIn PDF document text
    • https://actionsporting.com/userfiles/files/vemujipolizu.pdfIn PDF document text
    • http://mqskin.com/luutru/files/25626905518.pdfIn PDF document text
    • http://forumcutuca.com/ckfinder/userfiles/files/8952676228.pdfIn PDF document text
    • https://baigiangtoanhoc.com/upload/files/22861993943.pdfIn PDF document text
    • http://z500.si/files/59306691588.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/38672129109.pdfIn PDF document text
    • http://firstcuwire.com/file_media/file_image/file/kuvowofumifenadevoke.pdfIn PDF document text
    • https://silverbirdmarketing.com/pages/images/file/wusokevepemedadef.pdfIn PDF document text
    • http://sasmedm.com/www/js/ckfinder/userfiles/files/lijojigixilajap.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_off0000defd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFD 17896 bytes
SHA-256: 3e944867f78317119fd74ae814375d2af5025011bd0954c19b7dd22d85f3370d
font_01_sfnt_off00010d09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12520 11000 bytes
SHA-256: 6974e5312061de5799c1a9437d53a31f90d6f8bcb5a67f2ad9501e0fa51bf349

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