Malicious PDF — malware analysis report

Static analysis result for SHA-256 69e310062da8025d…

MALICIOUS

PDF

83.5 KB Created: 2021-09-05 10:32:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8f61eb15c597e570931635ea8ece8e11 SHA-1: 806643f2c946e57d411242e62ffe6c2dafab594b SHA-256: 69e310062da8025d1e9356aa23eab74d0ed3f5ec1784bb8c419998bc48088ef5
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URIs pointing to compromised WordPress uploads and disposable hosting domains. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://ddtoyz.com/ckfinder/userfiles/files/jonujudubi.pdf In PDF document text
    • https://planet-for-events.de/userfiles/file/62099500510.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/3c20b980c29ed831f1d2383fc1bf5b91/dajusuwuzalu.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/c00fed2fb164021f92486bf249eedc8e/verarokavomim.pdfIn PDF document text
    • https://www.gullyracing.it/admin/ckfinder/userfiles/files/17597318811.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160828dda42af0---duzosux.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/001ca56e11d097761030453b866cb645/19708864609.pdfIn PDF document text
    • https://noddy.nu/images/file/94593702264.pdfIn PDF document text
    • http://klasykarozrywki.pl/public/images/fck/file/foxafilujorel.pdfIn PDF document text
    • https://jackinthegymtpe.com/uploads//files/202108030825501607.pdfIn PDF document text
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/74225f8da685552e1f0cf5d68e5b8c0d/livikijevo.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/35115594155.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ac213a18e25---53799770879.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/4fcf99ca1e9dc23024ceb46a169ae0ab/44270980323.pdfIn PDF document text
    • https://path.mn/userfiles/files/zukesotu.pdfIn PDF document text
    • https://ilmercatinosottocasa.com/file/wejamijujajewiwiralifap.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/sefebevejitujozaxovobado.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/6b975a48828be0d84a2dfb021c10770c/87791608463.pdfIn PDF document text
    • http://denda.co.kr/ckfinder/userfiles/files/titimeb.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160bb49b791abf---97214895558.pdfIn PDF document text
    • http://smclassof57.org/clients/34860/File/ginujijipigifoz.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/066304ca5dadae3b7acb18ed2fb2c2eb/sujojosuruluzenozalomiwe.pdfIn PDF document text
    • https://laser123.com/geektic/files/wisuwiwa.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608216a71c17d---galibenobupepejuz.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/pgishksl8p73oq05bt4vq210c2/votexol.pdfIn PDF document text
    • http://ayurvedicclinic.org/userfiles/file/surisusu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=needle+gauge+chart+pdfPDF 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_off0000e179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE179 10492 bytes
SHA-256: 02b381093332dda77d6dcf8addcd83855f3392258e3e638204b8edd567a624ee
font_01_sfnt_off0000f944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF944 18316 bytes
SHA-256: 3bd32a635c2e317abf1b32ee50085c025a99a7511c8140e58b737fa37d0f9633
font_02_sfnt_off000128b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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