Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee8ce16b9a107696…

MALICIOUS

PDF

111.7 KB Created: 2021-07-23 09:58:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 731d465b657048e8ced7d5caca00304e SHA-1: 38fb8992bd423abe6cc59ef3e29089d17dfcb743 SHA-256: ee8ce16b9a1076962993a01dfe7075d7ddce943600da17582a2c5cab01d2985c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting, likely to distribute further payloads or phish for credentials. The presence of external URIs and link farm characteristics strongly suggests an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a4b11d543b---63097048322.pdf In PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/3c0kfdioq3tue83dag5nhif836/24810227407.pdfIn PDF document text
    • http://woods-china.cn/ci2/userfiles/files/20210601084256.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/97786edbe823171f649b24d1543ac7ec/tazopuxenimipadanubedowuz.pdfIn PDF document text
    • https://bangprice.combangprice.com/beta/cms_image/file/33177744308.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/e3ddc7444ffce7ce809f56075560c939/35430182778.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/ee42bb404863b7eb551c3cfa12ca5efe/40343949763.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16092687e60436---62412386793.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1b63e1a3ab---20725541251.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/68023561995.pdfIn PDF document text
    • http://zuche0551.com/upload/file/bevepifivesixokosumokumur.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/2iv73dc61m0kj5h4rudipjdvr0/57357645718.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2b9e8adc9---raribavulurugaxa.pdfIn PDF document text
    • https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/c9fiig1olbp4rl9afrpjhcmjqs/lejixaxezasalagewixedo.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfb4fa5377---moburijolu.pdfIn PDF document text
    • http://droneducational.com/admin/userfiles/file/dofolu.pdfIn PDF document text
    • http://hizlipin.com/calisma2/files/uploads/xofagekurewalafuvapanik.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/ef13fdcd27f9171f40018f05176606b7/jodukubomogekivorat.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/14a4bc7c77721024f064ce0b00144805/77977815124.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/c24e06731ec81117efce28bd6bda727a/pupofisajujawupe.pdfIn PDF document text
    • http://thegioituigiay.net/uploads/files/fovajejedew.pdfIn PDF document text
    • https://oteaexpert.fr/cite_imgs/file/98531517899.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/91u8h6f3r81n3t69p4tdkgb6op/34640731574.pdfIn PDF document text
    • https://brianhigbielaw.com/UserFiles/file/zelojowafabipowok.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ihcdilfchisr03383u871aei96/jesoli.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=another+name+for+hydrocodonePDF 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_off00014e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E2F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00016646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16646 10528 bytes
SHA-256: 3b9f3c4c47f97038597d12a5dff341ce1a536af72a1d15f9283adde3de8121a1
font_02_sfnt_off00017e1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E1D 19468 bytes
SHA-256: ba232642f43761d463eeec0aba5a6eb5b686d7874ff7cb6a8f3f7c304d77d911