Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd392f6f0d1d3dfa…

MALICIOUS

PDF

79.3 KB Created: 2021-09-19 13:27:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4e522e8a55faacd35d4a5bd9c04cbaa2 SHA-1: 7abe2913ca1218354abf55a2365e5459c4ca7bfb SHA-256: fd392f6f0d1d3dfa46a88f1b455434fa0cc9fb6cf68d25dc71bb6c82a60283ee
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to external domains, many of which are structured as link farms or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of these URLs being used for phishing or distributing further malware. ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • 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.
  • 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=sms+backup+app+download PDF link annotation
    • https://zlato-eu.cz/upload/files/bekolavolopolini.pdfIn PDF document text
    • http://faurau.com/luodan/images/userfiles/file/pesotopo.pdfIn PDF document text
    • https://ph2020.org/ckfinder/userfiles/files/xotuvaligarop.pdfIn PDF document text
    • http://yuhuimachinery.com/d/files/bodeguwixidanuxemizod.pdfIn PDF document text
    • http://xn--9i1b14l32gg2dsybq3b.com/upload/fckeditor/file/27071918876.pdfIn PDF document text
    • http://esistore.com/userfiles/file/xememolevaw.pdfIn PDF document text
    • http://flygarfield.net/userfiles/file/gonizuda.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/63f5e0323f5f575e1db08eabb767d51c/45971261814.pdfIn PDF document text
    • https://dalton-english.com/userfiles/file/13313752295.pdfIn PDF document text
    • https://renault-service.com/userfiles/2278823554.pdfIn PDF document text
    • http://apartament-krokus.pl/userfiles/file/gitimogukuvofigep.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/nurusuva.pdfIn PDF document text
    • https://prestinireedcorp.com/userfiles/files/kupidetawosijap.pdfIn PDF document text
    • http://topoint.cc/userfiles/fckFile/20210916185202.pdfIn PDF document text
    • http://oio.cn/uploadfiles/files/58689257843.pdfIn PDF document text
    • https://www.tvmreza.tv/ckfinder/userfiles/files/vowukegukozezemisepu.pdfIn PDF document text
    • https://latgalesamatnieki.lv/files/file/nibujajel.pdfIn PDF document text
    • http://ttmm.co.jp/ckfinder/userfiles/files/26441206524.pdfIn PDF document text
    • http://sunpix.ru/img/lib/file/vebisatiraruweturugemexu.pdfIn PDF document text
    • http://1carl.com/userfiles/file/vebazusenamuxe.pdfIn PDF document text
    • https://terracetemayonetim.com/upload/ckfinder/files/75054971023.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161344df5ab458---kojuru.pdfIn PDF document text
    • http://metrocars.london/survey/userfiles/files/87691960804.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/duzogowe.pdfIn PDF document text
    • http://eggtesting.com/admin/uploads/file/63980853643.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_off0000d1a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A8 17408 bytes
SHA-256: 1f101d278d88c5ffa2074b0d49734980314e9c351f85d1a66c1828fa73c16c43
font_01_sfnt_off0000fec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC9 10748 bytes
SHA-256: bd6db6e1a605579a68178ea55016f1983e9f96f46ff59db72da96f1e3a998759
font_02_sfnt_off00011755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11755 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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