Malicious PDF — malware analysis report

Static analysis result for SHA-256 9074f73839e4b107…

MALICIOUS

PDF

106.4 KB Created: 2021-09-06 06:22:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2d523e083b3e5f98fda07da3ed88d89d SHA-1: ef1abbd25d49d999cc97f724fe7e533bc0ff91cf SHA-256: 9074f73839e4b10784e2c9cb84bf78a2936f5f303bd171b52bff539334489289
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to lead users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

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://beautyyaurient.com/editor_upload/file/3530916740.pdf In PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/00df78fca238d2cdb46ad8b18d7e1a15/labevuniwuzezaluv.pdfIn PDF document text
    • http://yjccnc.com/upload/files/26519468889.pdfIn PDF document text
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/0262231ffbd7ae615aefcd4e63d21436/17544359291.pdfIn PDF document text
    • https://sysyanginguvenlik.com/uploads/files/31610243400.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/8c04b1bdf24dc01c34190f1e246df060/tasalip.pdfIn PDF document text
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/12405101138.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/3cfa91963d585039a8aca9b55f659067/kadisegofadosaruz.pdfIn PDF document text
    • http://krallarintavugu.com/upload/file/dipufavixefuxuviba.pdfIn PDF document text
    • http://evohome.pl/userfiles/file/fowodowesarepu.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/ri90v54nv61nici6patu9dfio6/16741503522.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d4d0a9541dd---kabomafat.pdfIn PDF document text
    • http://champaigncursillo.com/userfiles/file/788124243.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/d4e3286657aafa40802da3658b3b4084/78902366568.pdfIn PDF document text
    • https://dwitunggaljaya.com/sitefiles/file/jojepiwadigot.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/238d1ot6idjfp7td36p70ralgs/21960204683.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/1d59a32ff58fe2456e108fa18f7688e0/gapidoditudofabolekixo.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/dogubujobazofizaranura.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609af00ca4efb---futezurulusuladame.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/51c874eefbb2d2bee41d7cf852b01fe3/wigexewadulo.pdfIn PDF document text
    • http://karmand24.ir/basefile/ehotel724ir/files/nolenipaxovavezoro.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/76891364929.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bde2b6c791---24513103581.pdfIn PDF document text
    • http://ottomaniantextile.com/userfiles/file/jiweduv.pdfIn PDF document text
    • https://suacuacuontoanphat.com/upload/files/tumuriwa.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/6k52rbk353epvttggn24m0qbr9/tukovelijukitavapuminovi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=convertir+fichier+dwg+en+pdf+sur+macPDF 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_off0001362b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1362B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014e42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E42 11304 bytes
SHA-256: 170f3500bf54e532c59cafbdf633afd4db46c2e4ee88ad36e79a4388755ca4a7
font_02_sfnt_off00016889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16889 19848 bytes
SHA-256: 357d17e8ba4ddcc8b97c329bade7efbe4b78f3e3ef07a40b6c60b01349b419a9