Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c7fc85178cd2bcb…

MALICIOUS

PDF

78.0 KB Created: 2021-09-05 08:46:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c30baa9f019ff82bc83ecccb43e98aa6 SHA-1: 3baf5205332f1b0b20c4c020d3dda4f5efcdb27d SHA-256: 6c7fc85178cd2bcbb20e51c7e243c5c5154bc8bbfecbe362042138e00490be02
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs that form a link farm, directing users to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The primary function seems to be redirecting users to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://wastran.ru/uplcv?utm_term=libro+de+sociologia+rural+pdf PDF link annotation
    • https://tunhuaduytan.com/upload/userfiles/files/zarupenuvanafeka.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160818975732cc---53360426782.pdfIn PDF document text
    • https://hantverksakuten.se/ckfinder/userfiles/files/95834710151.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/lg5r5cuj33309q85c6m72h8p2a/51025175105.pdfIn PDF document text
    • http://monarchiaerembolt.hu/tmp/25943514888.pdfIn PDF document text
    • http://cathugo-yachts.de/res/wysiwyg/file/91963024756.pdfIn PDF document text
    • http://eia-edu.com/userfiles/file/jugajidagemumixavi.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b46a25c9740---14573313563.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3818b94030---pefawegufujilibuwadi.pdfIn PDF document text
    • https://pavillonwohlen.ch/userfiles/files/29876449979.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608e94c9a2c09---tuzixekijodepokuridumag.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/g7s8b39132j1bmjsg6s34gfhsn/76309336938.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/502e65ce74eb4090d98ac0c1810e80f2/87288537801.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/3sa02oo01nf3bs43qbe8el85l2/67205996746.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609a244475bf8---duxubulojupoxavogowigix.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b858619e73d---viguxefej.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/60208985109.pdfIn PDF document text
    • http://1night2day.com/ckupload/files/vugowidanoponumowubipuz.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611e33a3b73cf---36802262587.pdfIn PDF document text
    • http://greaterdeliveranceministries1.com/clients/61527/File/juvepuxajemon.pdfIn PDF document text
    • http://weorderfood.com/uploads/files/58538805980.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e332f7ee54---19990928592.pdfIn PDF document text
    • https://beatmuellerfoto.ch/userfiles/files/81912069388.pdfIn PDF document text
    • http://alptw.com/images/files/nateje.pdfIn PDF document text
    • 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_off0000cd70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD70 10788 bytes
SHA-256: b9df6f131df93e70b88df4a5d3f46e801bb1f430b0c3c14bb924931ad84fa028
font_01_sfnt_off0000e5f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F4 17640 bytes
SHA-256: 6b844e3318a8103af6e5f37dc2e7a03dae6521578794b9f00c565279d7cb5300
font_02_sfnt_off000112d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.