Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddbda48edb9c309a…

MALICIOUS

PDF

87.7 KB Created: 2021-09-23 14:32:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 503f9fcc20b823286e98ed9eeab275dc SHA-1: 87dae92620b936079b2b88427f6b7230602c49ee SHA-256: ddbda48edb9c309a9de3097ae93dd2ab0fb2d0c1044bb9d7010dbf450fdc254c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are part of a link farm hosted on disposable 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 malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://medvor.ru/uplcv?utm_term=app+fake+gps+android PDF link annotation
    • http://cosmikkino.ru/sadm_files/41847854980.pdfIn PDF document text
    • http://ammk.sk/userfiles/file/sopeverudotogigunen.pdfIn PDF document text
    • https://iasvn.org/Images_upload/files/rewasadenut.pdfIn PDF document text
    • http://www.ishvani.com/www/js/ckfinder/userfiles/files/gegajukolezaxiw.pdfIn PDF document text
    • http://nwatchonline.org/userfiles/file/sorigegimuvon.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/1c832dace05837686db44a41df9101f9/67155561709.pdfIn PDF document text
    • https://dhins.com/testingsites/advantage_aviation/assets/media/file/tutudawilego.pdfIn PDF document text
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/fomuzus.pdfIn PDF document text
    • https://iagclaims.endataclaims.com/ModCoreFilesUploaded/file/bededurujuwuzutalo.pdfIn PDF document text
    • http://satcomlink.com/userData/board/file/2857711412.pdfIn PDF document text
    • http://vaynhe.com/upload/files/3324511597.pdfIn PDF document text
    • http://hausdergesundheit.net/userfiles/files/poseriwuzaxok.pdfIn PDF document text
    • http://lovepetclinics.com/file_media/file_image/file/wilidifibo.pdfIn PDF document text
    • http://norrlandet.se/userfiles/file/nagirevutalukosawig.pdfIn PDF document text
    • https://brianhigbielaw.com/UserFiles/file/2267399233.pdfIn PDF document text
    • http://luijkzonwering.nl/image/file/palonisukutisusijap.pdfIn PDF document text
    • http://yuqiaohome.com/uploads/files/202109060500161797.pdfIn PDF document text
    • https://ruta.hu/ckfinder/userfiles/files/50671847886.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ad31c0d946---22048977045.pdfIn PDF document text
    • http://xn----7sbezcba9a5aggb3j.xn--p1ai/ckfinder/userfiles/files/dereraropiz.pdfIn PDF document text
    • https://gamma-electronics-eg.com/userfiles/files/73291531560.pdfIn PDF document text
    • https://mclandpin.com/calisma2/files/uploads/ganuganapuvixuxe.pdfIn PDF document text
    • http://poiskvod.ru/images/file/38825306560.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_off0000e705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE705 22380 bytes
SHA-256: 4416d5faa330262907a1fe4e50b7ed753cf148007a52ab57bc19bca1bf2bb064
font_01_sfnt_off000120a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A5 10600 bytes
SHA-256: 70f31bfb7a54bd7be69ee33eefd26daf8f48e0c583702cffda7c6b2e8dc5a441
font_02_sfnt_off000138cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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