Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce2babecd486688a…

MALICIOUS

PDF

71.8 KB Created: 2021-09-27 03:46:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4357d9b2488bab8fc8acac21791d5518 SHA-1: c261308b0715962bb70e6971e3fa92122db38b10 SHA-256: ce2babecd486688a669c439329d50c1cea68e6c14c4381212e7c4044bd3f4a46
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable hosting domains. These links likely serve to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://renknh.com/ckupload/files/lezeboxev.pdf In PDF document text
    • http://snft.ro/media/file/tivifiz.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/3b56d58ae2e910217a7e915933627a81/41714533623.pdfIn PDF document text
    • http://senvietsystem.com/ckeditor/upload/files/47240317405.pdfIn PDF document text
    • https://kawanmto.com/contents/files/majomadidev.pdfIn PDF document text
    • http://stepasidemedical.com/images/uploads/file/jefoponegekini.pdfIn PDF document text
    • https://ita.kru.ac.th/ckfinder/userfiles/files/tatoxinesa.pdfIn PDF document text
    • http://taispacedesign.com/upload/files/61428782402.pdfIn PDF document text
    • https://nocenzura.space/web/img/podborky/files/79911010419.pdfIn PDF document text
    • https://incoyun.com/calisma2/files/uploads/57580957533.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/vvldsflflmr988h491lqu9mes7/43351252152.pdfIn PDF document text
    • https://www.douggoodkin.com/admin/ckfinder/userfiles/files/muvupupasuzozoxewotebotov.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1614c720d399ac---xisadogugix.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16142167c0bda2---34273890216.pdfIn PDF document text
    • http://devitohomesorlando.com/userfiles/files/diwuzujalofof.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16147cff53c670---pubatositizexifupati.pdfIn PDF document text
    • http://fine-trading-knotwork.com/uploads/media/tapirogude.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/69509056402.pdfIn PDF document text
    • https://tutorbolivia.com/userfiles/file/wowatawijebuzuwedut.pdfIn PDF document text
    • https://spirit-legend-enterprises.com/webroot/editor-uploads/files/detaxuwarovanaredota.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/ilf5almjsg0gs0pg2meihkrqe6/vilufiwigipozerogag.pdfIn PDF document text
    • https://dunakanyarfesto.hu/ckfinder/userfiles/files/79443645907.pdfIn PDF document text
    • http://nfraccon.org/userfiles/file/67761646826.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1614eba459a215---bopijidu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=io+games+with+party+modePDF 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_off0000b36c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB36C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB7E 16896 bytes
SHA-256: 51c1442be645f0157f357faa97278314af8fbc7e76dc20efcc996fb78fcac5c7
font_02_sfnt_off0000f6f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F9 10840 bytes
SHA-256: 3c68ccdb8845a51a2b5261230b604d7173583dc906220bda5995587593d4dfe3

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