Malicious PDF — malware analysis report

Static analysis result for SHA-256 06ec04fa46ab7dcf…

MALICIOUS

PDF

80.7 KB Created: 2021-08-29 02:49:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e713b204b05381ee2ad5415d236f510c SHA-1: 726528e1e962d9b8c32193df7a9e66525a2b66fd SHA-256: 06ec04fa46ab7dcfd31a8bcb5ae7f8c33bafd6aae3fc5276cea625afb1d8b163
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, many of which appear to be part of a link farm designed to redirect users to potentially malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for these links, further suggesting malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://pixomot.ru/uplcv?utm_term=the+son+of+bigfoot+watch+online+free PDF link annotation
    • http://gzafjc.com/uploadfile/files/33584795843.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/fofol.pdfIn PDF document text
    • http://kartelabasligi.com/images_upload/files/lemixubeda.pdfIn PDF document text
    • http://cameranichietsu.com/luutru/files/masezupizizusozu.pdfIn PDF document text
    • http://whitedwarf.ru/public/images/ckfinder/files/15617589604.pdfIn PDF document text
    • http://naasschoolofmotoring.com/fckeditor/userfiles/file/bozol.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/kudobobirudusisipugipugaf.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/6a1242c1bbb21a3079790b423b11f46a/mokoxuf.pdfIn PDF document text
    • http://vpecargo.com/userfiles/file/71963013474.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/c791fr9a9ovmfkhmum39qiq629/73985451880.pdfIn PDF document text
    • http://uniradioweb.info/userfiles/files/xasenul.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea59c56890---gulugupazisivag.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160ee4e12e9ace---kaxawitawat.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/78d6da709fa9731cd636410a5e4a9414/37278735454.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b10a0d9a4---76177808764.pdfIn PDF document text
    • http://hosteleriayvending.com/ckfinder/userfiles/files/libojotipijaxiduku.pdfIn PDF document text
    • http://kangs78.com/clients/66216/File/93417544383.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/iqthpd38j6a9e8vovduk5bien3/korazobodomobiji.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/54e99c420a7581fa898c388fe31d69f7/zetozovizazopa.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc3f825f1d---beveku.pdfIn PDF document text
    • http://hamzalegalservices.com/userfiles/file/pewavuxabosokenadej.pdfIn PDF document text
    • http://wilkinsconnection.com/clients/9/94/94ba1e7d864c5c8af3bb481f5f9f31de/File/gijide.pdfIn PDF document text
    • https://vanrun-it.nl/userfiles/files/52529124061.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_off0000d63d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD63D 10804 bytes
SHA-256: e05de8de6723d477b6ce697fc5869e7999a296deeec440c6acce7b8a8306d5be
font_01_sfnt_off0000ef34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF34 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10746 17288 bytes
SHA-256: 91bde35b83c5b96f649730b23b8a055f0853dfbb7f664fb0ca3b1c3f9a076920

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