Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb6387ca1f4c3293…

MALICIOUS

PDF

87.7 KB Created: 2021-09-12 16:02:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 6fd0da860f8e0d971a2b90170891d7e2 SHA-1: 9f2a9051877a47c99ac72d78ab1306fa3ca9f842 SHA-256: eb6387ca1f4c32931d813db86802e5b0e64f2bec1bf662f18aefd1f9416c55cb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV. It contains an embedded JavaScript stream and a link farm pointing to multiple disposable hosting domains and compromised WordPress sites. The URLs suggest a lure for downloading an Android application, indicating a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

Heuristics 7

  • 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.
  • 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://ketchas.ru/uplcv?utm_term=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%BF%D1%80%D0%BE%D0%B3%D1%80%D0%B0%D0%BC%D0%BC%D1%83+%D0%B4%D0%BB%D1%8F+%D0%BF%D1%80%D0%BE%D1%88%D0%B8%D0%B2%D0%BA%D0%B8+%D0%B0%D0%BD%D0%B4%D1%80%D0%BE%D0%B8%D0%B4+%D0%BF%D0%BB%D0%B0%D0%BD%D1%88%D0%B5%D1%82%D0%B0 PDF link annotation
    • http://tolltisztitas.eu/userfiles/files/xipebax.pdfIn PDF document text
    • http://mariancozma.com/_user/file/wuwota.pdfIn PDF document text
    • http://veterky.ru/ckfinder/userfiles/files/15103249582.pdfIn PDF document text
    • https://2b3la571ga-70p.com/contents/files/32977769934.pdfIn PDF document text
    • https://next-engineering.com/userfiles/files/45863302157.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/vhkimo4ghesk912jevsofbm01n/jigox.pdfIn PDF document text
    • https://zibarajabi.com/cache/fck_files/file/muvisumidepatiruvajil.pdfIn PDF document text
    • https://incense888.com/uploads/files/202109120555569757.pdfIn PDF document text
    • http://bridgestone-ice-cruiser-7000.ru/ckfinder/userfiles/files/wokuwiwafawu.pdfIn PDF document text
    • http://petukmahaaaraj.com/userfiles/file/sowixojivodujutoxu.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/92a24aebe1ab314ed40c78b052f2175e/sedabeboja.pdfIn PDF document text
    • https://afmiletisim.com/resimler/files/5077172946.pdfIn PDF document text
    • http://www.protectakoteasia.com/ckfinder/userfiles/files/2694513530.pdfIn PDF document text
    • http://vakantie-noordlimburg.nl/ckfinder/userfiles/files/fufegabakeg.pdfIn PDF document text
    • http://olivetheater.com/userData/board/file/norozulelujezufexoga.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/7dfb06a14ead873e54235d5ea437b90a/fijonulipugibevejibexab.pdfIn PDF document text
    • https://codefon.hu/js/ckfinder/userfiles/files/51879620288.pdfIn PDF document text
    • http://lobi.md/userfiles/file/70800248043.pdfIn PDF document text
    • https://psihodesk.ro/ckfinder/userfiles/files/bebomaga.pdfIn PDF document text
    • https://kisikana.hr/UserFiles/files/julofigofam.pdfIn PDF document text
    • http://pinturasoltra.com/images/slider/files/jogowibigibejigit.pdfIn PDF document text
    • https://fuoriscena.eu/file/tugenuvidexazofibug.pdfIn PDF document text
    • http://househouse.it/userfiles/files/42581708378.pdfIn PDF document text
    • http://business-plan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/67958069640.pdfIn PDF document text
    • https://www.barefoothoa.com/webroot/js/ckfinder/userfiles/files/25430226345.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC935 16148 bytes
SHA-256: 1c024217ce21bb66922f73502146d3c7616b47413e2e194c36dd680b30e64e78
font_01_sfnt_off0000dec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC2 11092 bytes
SHA-256: 1d0a049d5ce1afea4b54345b0c979edd1ccf9ed3bb530735b0ce3fc66a37a369
font_02_sfnt_off0000f85b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85B 24800 bytes
SHA-256: 2388c541e5ca86db47232935ac3d35c5062d02defa8f5f1e331033e2c2056af5
font_03_sfnt_off00013529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13529 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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