Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5735e3c72c7ee5a…

MALICIOUS

PDF

80.4 KB Created: 2021-09-16 20:25:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 08657a9a79537e7246d926e0bcd73c9c SHA-1: fa079b0495447c8b51e0ba4e0f70c7ab205539cd SHA-256: e5735e3c72c7ee5abddbe2fd1dd1f8fb547ac285290e6901b12ef62d5cc144e7
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, indicating it is designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of embedded JavaScript points to an attempt to execute code within the document, potentially to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://garglob.ru/uplcv?utm_term=funtouch+os+latest+version+download PDF link annotation
    • https://buildingexpertsdirectory.com/ckfinder/userfiles/files/33113260266.pdfIn PDF document text
    • http://gorsilawfirm.com/userfiles/file/14878291512.pdfIn PDF document text
    • https://www.icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/40555822044.pdfIn PDF document text
    • http://skinct.com/upload_file/file/Fl202109040902563259.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/44f9490abc975a36cbb8173b71c53100/92525491692.pdfIn PDF document text
    • http://asacnfservices.com/ckfinder/userfiles/files/63623218258.pdfIn PDF document text
    • https://nepalmicrofinancesummit.org/userfiles/files/82258539199.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/kazodunivufuvomumobosa.pdfIn PDF document text
    • http://tauroconsulting.pl/userfiles/file/sujewikozowozefunifikove.pdfIn PDF document text
    • https://pasifikendustriyel.com/userfiles/file/89448720255.pdfIn PDF document text
    • http://ibsdhc.hpds.work/ecdemo/web/js/ckfinder/files/files/77454719568.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135cd350cbfb---42076730800.pdfIn PDF document text
    • https://patc.fr/imagesfile/tabezodafara.pdfIn PDF document text
    • https://spcinternational.in/ckfinder/userfiles/files/30791115549.pdfIn PDF document text
    • http://www.likoda.com.tw/upload/ckimg/files/vemepapebosujunok.pdfIn PDF document text
    • https://norservis.com/files/files/12840170879.pdfIn PDF document text
    • https://bomberosdenavarra.com/userfiles_nexo/files/kezur.pdfIn PDF document text
    • https://indobaliart.com/sitefiles/file/bijumamigafuwonugit.pdfIn PDF document text
    • https://machnik.net/ckfinder/userfiles/files/4399500483.pdfIn PDF document text
    • http://viquadro.com/userfiles/files/vatakofodomuj.pdfIn PDF document text
    • http://jtravel.clickis.kr/FileData/ckfinder/files/20210911_E6D4A99C7B98617D.pdfIn PDF document text
    • http://zangerlelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/ririjoxekamufekilod.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_off0000d7bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD6 10696 bytes
SHA-256: 1e81d2d09ca7f37782dc042bd0bd03f7e26c0b1c57a52528c42c6e6042e32532
font_02_sfnt_off0001085a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085A 16752 bytes
SHA-256: 806b5e0550a8eebf63de35e1e6ffda5ce46e3869e25a4bfdcdd32d3e1fce0d6a