Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea63476bef6afab6…

MALICIOUS

PDF

88.1 KB Created: 2021-06-28 08:44:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: cdeaec1c0bf797a4bf5b686a870db349 SHA-1: c4f50862e822dcb403ae81936aa38ef7571089cd SHA-256: ea63476bef6afab6c9842d3f17e83586076e0f030e9e3217a4ed9fa97862f7e0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics as a link farm hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs point to various subdomains and paths, suggesting a broad campaign to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/hmstj92bp1te073l5l7nbs0v12/95483919195.pdf In PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/na6bq02livajjv97t1mkcmouai/pugikofaxere.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/aveg8ib3c714p9h7jlc1nvsld2/jorenoguw.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/bvdgleorac3r373uka5pac2ahg/memamoru.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/813a7a6d49f91bbaf4d4021ba9002792/levigade.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/16081eeb387cd6---27938863979.pdfIn PDF document text
    • http://tovicetour.com/FileData/ckfinder/files/20210609_AAAA27CA993C0B17.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/e89imf2i5v0m83cta0a6og37q0/40484674548.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/eusc70f1ccc7ivd5kjj67smhr7/94200712842.pdfIn PDF document text
    • https://steklo-shik.ru/userfiles/file/70116305033.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608064c002cc1---ruxolimezene.pdfIn PDF document text
    • http://teckim.it/themes/userfiles//files/lidazera.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/5b9999a4bd1f214eaca8f448b9bb718f/butuvukulojunat.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/4a114ffc3883175ef4095b405d1a4410/95628154057.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/a64e73e6055bd3e3d5c8e119c2233f71/kutaxaw.pdfIn PDF document text
    • http://hopkim.vn/upload/files/53192968920.pdfIn PDF document text
    • http://nb111.store/web/images/ckfinder/files/20210610070317.pdfIn PDF document text
    • https://airbays.com/userfiles/file/22205171716.pdfIn PDF document text
    • http://lsbwg.com/ckfinder/userfiles/files/20210621/2041198577.pdfIn PDF document text
    • http://granite1962.com/clients/869125/File/nulinijexevavinufalixere.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/12d5ab239bb37fd04a27a0562746a1fd/30036033332.pdfIn PDF document text
    • http://eperon-kochersberg.com/img_db/dadixalinug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=hltaid003+provide+first+aid+assessment+workbook+answersPDF 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_off0000f2d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D6 11328 bytes
SHA-256: fd5a850c3f0fd164fcbe37f1fe5b37f733d480a9c843dc6a18fb034ab679f56f
font_01_sfnt_off00010d45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D45 17416 bytes
SHA-256: 9e9071bf0deb1e9e8ece3c7a51849d2be5c20a0b3d4a6f324980e39ba3ba6a5f
font_02_sfnt_off00013ae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AE1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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