Malicious PDF — malware analysis report

Static analysis result for SHA-256 93d96e1693385e1f…

MALICIOUS

PDF

79.1 KB Created: 2021-09-10 22:37:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 560ef69d5c5eacdf2120edd60515dff0 SHA-1: 7aae6c442baae01bbb655c18c60b8c6527a324d3 SHA-256: 93d96e1693385e1fb41d392142fcb084f20031a22036fcabe8c1d16e96351c80
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external URIs, indicating it is designed to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript points to its use in exploiting PDF vulnerabilities or delivering malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://coretry.ru/uplcv?utm_term=catch+trainer+pokemon+emerald PDF link annotation
    • http://bharatandcompany.in/ckfinder/userfiles/files/gatonosasivezajixiso.pdfIn PDF document text
    • http://100gastro.cz/soubory/files/vepikakasokitom.pdfIn PDF document text
    • http://crystal-lamp.ru/uploads/files/9681729317.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/af9f1318b450141df22f939a90f83209/74918648151.pdfIn PDF document text
    • http://ibb-online.ru/f/file/52033593596.pdfIn PDF document text
    • http://www.medicellbank.com/userfiles/files/salaritagamivoz.pdfIn PDF document text
    • http://nrgmedia.hu/files/file/jenunelibotamebivog.pdfIn PDF document text
    • http://cuacuonnhanh.vn/Images_upload/files/69033158525.pdfIn PDF document text
    • https://2winit.com/Files/files/mimagapazatoba.pdfIn PDF document text
    • https://sca-eagleegg5k.com/ckfinder/triplebuserfiles/file/89030846758.pdfIn PDF document text
    • http://mrtowing.ca/Lawyers/userfiles/file/xavubegodolukozof.pdfIn PDF document text
    • https://proxus.nl/file/kejuvilopiwojidamal.pdfIn PDF document text
    • https://all-stage-meditation.tw/uploads/files/613b33bbc072b.pdfIn PDF document text
    • http://tycoonmedical.com/userfiles/file/21431291123.pdfIn PDF document text
    • http://rothemtour.com/FileData/ckfinder/files/20210910_676CEEC28BFDB67D.pdfIn PDF document text
    • http://oldmotorsclub.com/files/file/72219212094.pdfIn PDF document text
    • https://dacola.com/upload/files/11820617964.pdfIn PDF document text
    • https://www.sensormaticltd.com/app/templates/js/ckfinder/userfiles/files/sijutofumabame.pdfIn PDF document text
    • http://swhos.com/upload/files/bamulawajifonitonutopoz.pdfIn PDF document text
    • https://unovosti.tv/ckfinder/userfiles/files/53747939412.pdfIn PDF document text
    • http://erictex.com/ufiles/files/lofaposemidekiwojokavorit.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/161325b4c15f2f---84174917379.pdfIn PDF document text
    • http://m-styleauto.com/js/upload/files/80915092012.pdfIn PDF document text
    • https://somos.co/dleyes/admin/fotos/file/80935714342.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_off0000ce83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE83 10732 bytes
SHA-256: d22967ba37cde798169e91ffde63ee9ae46a8119667c1f4684be782f85035a2a
font_01_sfnt_off0000e6ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6EE 18452 bytes
SHA-256: 10d1aee42b46a514579fb8ef5822dabd6919d0054856232459fce7e6d37e5d4e
font_02_sfnt_off00011683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11683 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1