Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebacf2055a3202eb…

MALICIOUS

PDF

78.3 KB Created: 2021-09-02 22:24:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b2fdb2645d934f6e5db0ba5bccd4ba51 SHA-1: bd64a3e2b3500da7de8e5ea97d2eb518b5737066 SHA-256: ebacf2055a3202ebcc1746c3a51a52512bf52afa64159849b575673c1e8a2c91
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded URLs, many of which point to compromised or disposable hosting domains. This behavior is characteristic of a link farm designed to distribute malicious content or phish for user credentials. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://tnmkor.com/FileData/ckfinder/files/20210828_3353E0A3ACB7B3AB.pdf In PDF document text
    • http://nessium.fr/userfiles/file/pofigidadosiwexufoduwir.pdfIn PDF document text
    • http://wijnhuis-vaessen.nl/site/data/ws/files/ximukawedilaxokewos.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/f9puc3u2lvoelqo20099hc7nk6/20177201762.pdfIn PDF document text
    • https://agatanorek.com/files/file/vuwuvetexunaruvidasunaf.pdfIn PDF document text
    • https://taechoclub.com/FileData/ckfinder/files/20210813_67AB1F1B6617E8DE.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/64290790400.pdfIn PDF document text
    • https://www.afoa.org.ar/backend/ckfinder/userfiles/files/pupidozugiwa.pdfIn PDF document text
    • http://hotelpenza58.ru/ckfinder/userfiles/files/visiligugudagedo.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947effb9e92---kolavitetofexikufut.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/fa34dfb8b6c13257ece16225a10b81f5/ritibaxar.pdfIn PDF document text
    • http://anupbolivia.com/images/files/52184633125.pdfIn PDF document text
    • https://songhongresort.com/img/files/tesefomomunepojuv.pdfIn PDF document text
    • https://bosgo.mn/uploads/files/86407831214.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/4451d1902e50babaf016ea9160d84b6a/56487369253.pdfIn PDF document text
    • http://gidaero.com/upload/fckeditor/file/nabunobitujike.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/vgom8c6g3h58pjb8f5e9oetc8t/kepojur.pdfIn PDF document text
    • https://mvpartners.be/images/uploadedimages/file/kejoku.pdfIn PDF document text
    • https://ifbscalidad.eus/files/galeria/files/fubixoto.pdfIn PDF document text
    • https://rumputhijau.com/contents//files/71037030906.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/70ef88dd4cf8157727bc0d86564e2812/supijaxujaxixiwe.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/1f58b740bdf167f7777564696f7b52fa/19287820107.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/rofuvir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=regular+and+irregular+verbs+worksheet+worksheetsPDF link annotation
    • 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_off0000cf52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF52 11056 bytes
SHA-256: c5e2b12c4cb91a10f6fc8aef34861fe51de5b16f12fdc43a1a2cb801bf77fcbc
font_01_sfnt_off0000e8da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000100ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100EC 16476 bytes
SHA-256: af6afe4c0505cb416fe4a13a52475f01d117bc27155c627a6225701557fe63e7

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