Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e50f29bcd601418…

MALICIOUS

PDF

80.6 KB Created: 2021-08-20 09:20:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 98140046f24f2e9c025fac414c78b043 SHA-1: 95c2d4d10a5c543253e920080173aefbae59e425 SHA-256: 9e50f29bcd6014184dc2f5432d31eec68deb4e2585d1926bff833b0865c64417
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm that directs users to various domains, some of which are hosted on compromised WordPress sites or disposable hosting, increasing the likelihood of malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://rozgarnetwork.com/ckfinder/userfiles/files/59832826062.pdf In PDF document text
    • http://softwarefactory.nl/images/file/61699658771.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/mopopiza.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/8b7be5aa8a740f9ada5b8177c7c125e4/48671342844.pdfIn PDF document text
    • https://okud-istra.hr/userfiles/file/juwupogosanukelowubuz.pdfIn PDF document text
    • http://gleneaglehoa.org/images/file/valetifodege.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608edd564417c---jufojojakev.pdfIn PDF document text
    • http://nhs-carpediem.com/clients/46367/File/22355414411.pdfIn PDF document text
    • https://rubenferro.com/userfiles/file/nawavusebezegosigap.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/21259970593.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16072a67493d22---49095517275.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/t7h0f4d9uile82cpbo7afe5joh/24725441025.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/trghuo1s85g3q4rh3ouklnsauv/guvimojimim.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160867ecf2d761---xoxisobakowikagidefolitej.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/73e78688cfaee291401ce86d09a9110f/guxulugo.pdfIn PDF document text
    • http://gintaras.cz/userfiles/file/gawawativerulonigudewo.pdfIn PDF document text
    • https://igruppe.no/ckfinder/userfiles//files/topev.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a444fb851aa---nifoxuralerunapifexixiva.pdfIn PDF document text
    • http://beiwendq.com//data/attachment/file/tisowomixidiwaxisikapobo.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/a0bd1f72391c573d3f6091aa7cea9542/fulukuvaripotidigapomoba.pdfIn PDF document text
    • http://jingyitech.com/uploadfile/79501259412.pdfIn PDF document text
    • http://faurau.com/luodan/images/userfiles/file/20331613180.pdfIn PDF document text
    • https://tenfci.org/userfiles/file/nuxutax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=maria+helena+diniz+curso+de+direito+civilPDF 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_off0000d1ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AC 10688 bytes
SHA-256: 7bfdcfd2e040dd25434f92479b17fe805721a3275a719916408d79fb37741617
font_01_sfnt_off0000ea2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001023f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023F 19232 bytes
SHA-256: e17ac8592756ca837526a8f0e4b7981fc9404b61036b44ab6662d8a0d99141d3