Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c29a06742dc90d7…

MALICIOUS

PDF

84.7 KB Created: 2021-09-04 14:10:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7c08cc51971a3e07e704ddc624302abf SHA-1: 116253e5e78351f325b0a55ed8bdf8c4b7552e4c SHA-256: 0c29a06742dc90d71e44c1f7e3801fa0a148899d39d31bd3bc5af75f9e1799a9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the nature of the links and the PDF structure align with techniques used to deliver secondary payloads or redirect to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://accesoriosalmayor.com/images/userfiles/file/63574321149.pdf In PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/29a2a572902ed0535363cf1891e79b50/natuzakofim.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/42478274328.pdfIn PDF document text
    • http://www.coverseg.com/uploads/ckfinder/files/22870103974.pdfIn PDF document text
    • http://cherriestattoo.com/ckfinder/userfiles/files/42329309069.pdfIn PDF document text
    • http://furniture83.com/upload/files/40888412364.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/18595444913.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/pojojotelatojuziwewekinu.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/20840129472.pdfIn PDF document text
    • http://xtra360.net/campannas/file/xegozeriruseporigidipap.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1289931b2---totizaderezaz.pdfIn PDF document text
    • http://metrocars.london/survey/userfiles/files/mirajiporeput.pdfIn PDF document text
    • http://autodilykanka.cz/cmsimple/images/file/99609561569.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d907205cd5---65870981335.pdfIn PDF document text
    • http://toshiteriyakiburien.com/uploads/files/91314927200.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/48684136674.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/reviwuba.pdfIn PDF document text
    • http://karimeh.com/public/userfiles/file/tuzinulipaximari.pdfIn PDF document text
    • https://bya-ingenieria.com/ckfinder/userfiles/files/84892380021.pdfIn PDF document text
    • http://domainecomps.com/documents/files/wefosof.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1612dabc23bdcd---91906458430.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/05ede78d7c1b654589eb41402854bc8d/xofuzinup.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/4033299762.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd8820ab66---6966521339.pdfIn PDF document text
    • https://alibabaoman.com/basefile/alibabaomancom/files/lelexudota.pdfIn PDF document text
    • http://uptownherndon.com/uploads/files/17378057130.pdfIn PDF document text
    • https://gmnavarra.es/ckeditor/files/12140180709.pdfIn PDF document text
    • https://codecs.roimages/file/98239397044.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=best+free+pdf+editor+2018PDF 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_off0000e4eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EB 18124 bytes
SHA-256: ea110ec28a3ece51a6182a3139047585d1ac3103d9ba2e704c239519308833b2
font_01_sfnt_off000113fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C14 10736 bytes
SHA-256: 0f649cfabb69f1786903ec3a1dca04597c2cfb68e1d0dc0fc49bec434005366e

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