Malicious PDF — malware analysis report

Static analysis result for SHA-256 692580faccfda540…

MALICIOUS

PDF

80.1 KB Created: 2021-09-17 13:30:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4acb37a955e0a97e761124cc6e40dfcb SHA-1: 7bb0e863142657cfb687daf64c6c6fd107117fe0 SHA-256: 692580faccfda54090bf8f76bca897a9e360b4330f67461b655b4582cd84298f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1071.001 Web Protocols

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable domains and are structured as link farms. 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 the user to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://broadcasthub.com/ci/userfiles/files/4779419585.pdf In PDF document text
    • https://swift-tw.com/lcc/upload/files/vowopibukuwafi.pdfIn PDF document text
    • http://mansiya.com/uploadfile/files/28790191041.pdfIn PDF document text
    • https://kibledergisi.net/resimler/files/xakewavovamunad.pdfIn PDF document text
    • https://artistaone.co/userfiles/files/58993116369.pdfIn PDF document text
    • https://verredistri.fr/xmedia/file/91166458601.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/5871703460.pdfIn PDF document text
    • http://geologicatoscana.eu/userfiles/files/tiwupaxisupejivokemo.pdfIn PDF document text
    • http://vxclouds.com/userfiles/file/gimapepugudebuzebala.pdfIn PDF document text
    • http://www.anapharmata.hu/ckfinder/core/connector/php/files/ronadasaxebesefowik.pdfIn PDF document text
    • https://nangluongvada.com/uploads/files/rodigegokig.pdfIn PDF document text
    • http://s2ipower.com/survey/userfiles/files/3916995707.pdfIn PDF document text
    • https://kop-trans.pl/uploads/userfiles/files/kaladaxunubezim.pdfIn PDF document text
    • https://dongciao.com/uploads/files/202109131747074179.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/12515779044.pdfIn PDF document text
    • http://www.ochoadentalcare.com/tacgestorcontenidos_ochoa/documentos/file/In PDF document text
    • https://hetodon.com/fckeditorfiles/file/7871221375.pdfIn PDF document text
    • http://veszpremkosar.hu/_user/file/zajegaguvatuxukulojasaj.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138f84da3243---vuzirajebomesawasejejol.pdfIn PDF document text
    • http://kantoromega.pl/userfiles/file/mukedoz.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16135219da5727---kazurimuwejudunese.pdfIn PDF document text
    • http://corse.annuaire-regional.com/ckfinder/userfiles/files/33298022376.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/rasefurubij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=50+shades+freed+free+watchPDF link annotation
    • https://mediacentre.aerlingus.com/js/ckfinder/userfiles/files/23363340751.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_off0000d641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD641 10456 bytes
SHA-256: 9a64e7f9ed5920a9e21586ad5284c83cafd637c5939c012abce467462fb38e6f
font_01_sfnt_off0000ee45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE45 17192 bytes
SHA-256: 7083bf1e19bcad78c531767cfcdbd358963c5216c7a321bd2bb8b2fd50d905c9
font_02_sfnt_off00011ad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1