Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8c5e9a645ef7dfd…

MALICIOUS

PDF

83.0 KB Created: 2021-09-13 07:27:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6d1b2fd9ea51ce74e3f8fc7e8264d1e0 SHA-1: a03046e9d51a5256d489fb4d1530929cc49345fa SHA-256: e8c5e9a645ef7dfd5429b0d4a1bd166105d1ed3db97a2de75fdd8b5cafbe7afc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, indicating a strong intent to redirect users to potentially harmful sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' confirms this behavior, suggesting the document's primary purpose is to facilitate malicious redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 5

  • 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.
  • 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://laborke.ru/uplcv?utm_term=harry+potter+and+the+goblet+of+fire+game+pc PDF link annotation
    • http://www.jindatunnel.com/up_files/file/folesuxafiwakazipetu.pdfIn PDF document text
    • http://duet-czluchow.pl/userfiles/file/66067123905.pdfIn PDF document text
    • https://transilvaniafishing.ro/app/webroot/files/userfiles/files/41497000707.pdfIn PDF document text
    • http://utcsp2.rustyramone.com/uploads/files/51668642778.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/161349db7cc81b---gozelokunivezavav.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/18211293486.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/50002002581.pdfIn PDF document text
    • http://studio-rivetti.it/userfiles/files/kovetan.pdfIn PDF document text
    • https://aromamarketing.md/img/files/xaletegezu.pdfIn PDF document text
    • https://hefcom-hydraulics.com/ckfinder/userfiles/files/fosarab.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/majuriwuxabodobuwufo.pdfIn PDF document text
    • https://matricula.netlandschool.cl/files/79682479861.pdfIn PDF document text
    • http://ark-mr.com/data/home/qxu2063190031/htdocs/uploadfile/files/24387946137.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1613b5a620c5b5---64506898661.pdfIn PDF document text
    • https://aedwea.com/upload/foto/buwizuwilenixunuxuwinu.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/fobapezopodirepanomijusam.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/muraxoselu.pdfIn PDF document text
    • http://scarpatti.com/files/xarodev.pdfIn PDF document text
    • http://honeystraw.com/uploadfiles/file/revari.pdfIn PDF document text
    • http://cofetariafraguta.ro/UserFiles/file/wibafizufogakab.pdfIn PDF document text
    • http://neoneofitou.com/ckfinder/userfiles/files/guduka.pdfIn PDF document text
    • http://didopack.com/files/68459454612.pdfIn PDF document text
    • http://lexxyin.net/files/fckeditor/file/32687458258.pdfIn PDF document text
    • https://shopinhome.com/ci/userfiles/files/61733669538.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_off0000dd00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD00 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF512 18172 bytes
SHA-256: d045750f0505e908c42a9f87d1d7951abc43f09f3247635ba14f291686cc82f8
font_02_sfnt_off000124ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124EC 11144 bytes
SHA-256: 2cbb6e9532537aff557bbd6a64be25c2efc2a41bc3dee35bc05d7713422866e8

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