Malicious PDF — malware analysis report

Static analysis result for SHA-256 263e110149d6ca32…

MALICIOUS

PDF

75.3 KB Created: 2021-09-22 11:55:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 01034f28774ec6545f90a2327f092e81 SHA-1: 5a86c951a7027641180b55aa3915a9bab670a5aa SHA-256: 263e110149d6ca32df9072fe0f8b96e8325e957608ce760c4d6e011ed1c4b6be
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous embedded URLs, many of which point to suspicious domains, suggesting a phishing or redirection attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm on disposable hosting, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://khachsan295doson.vn/namthuan/images/news/files/50549594761.pdf In PDF document text
    • https://nguyenhungstone.com/uploads/image/files/wofibaxado.pdfIn PDF document text
    • http://streathamtaxi.com/survey/userfiles/files/fofofasujegu.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/161479025427e6---fakibar.pdfIn PDF document text
    • https://rabudiagnostic.com/userfiles/files/xefirukipetolezuvi.pdfIn PDF document text
    • https://www.jdconstinc.com/ckfinder/userfiles/files/merolusorofamu.pdfIn PDF document text
    • http://teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/jomapefikozilulebaden.pdfIn PDF document text
    • http://lightofislamonair.org/uploads/files/kelitevujifipuker.pdfIn PDF document text
    • http://lavalnerina.it/userfiles/file/ropukiwijanumirinororexij.pdfIn PDF document text
    • http://fitviewer.info/files/file/74633329026.pdfIn PDF document text
    • http://www.sudeshnamaulik.com/fckimages/file/gotukaserirabisovewuleri.pdfIn PDF document text
    • http://wm-meyer.de/meyer/admin/editor/ckfinder/userfiles/files/parujax.pdfIn PDF document text
    • http://bakoca.hu/files/file/nuwomamogevenobirowan.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/2007a13d9791ce2d06e9d04149976d1b/jorela.pdfIn PDF document text
    • https://izometal.net/mm/file/mizafu.pdfIn PDF document text
    • http://rilta.net/userfiles/files/vutinafarepifipivimatu.pdfIn PDF document text
    • https://nawaasha.org/userfiles/file/43892648044.pdfIn PDF document text
    • http://ecovn.vn/uploads/news_file/relebomujavozivap.pdfIn PDF document text
    • http://pilanatofishing.com/home/sandbox/domains/shelter.sandbox.tritek.hk/public_html/ckfinder/userfiles/files/gawaxosemalasesepafun.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/banebilozazobo.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/25623744408.pdfIn PDF document text
    • http://haustechnik-hagenauer.at/47836282537.pdfIn PDF document text
    • http://gdfsztal.com/uploadfile/files/39809435892.pdfIn PDF document text
    • http://krakow4you.pl/krakow/files/dubekimipizi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=penelope+parker+los+hombres+siempre+vuelven+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_off0000bea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEA2 18396 bytes
SHA-256: 2d7443fbef71123cdbfcbf07c6650e6398d478ea111da970191ab986814bbb81
font_01_sfnt_off0000edb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB2 11064 bytes
SHA-256: e475b9675f9267295888664139e6a11f9ea66c3265dca48218e5782e2649b2f5
font_02_sfnt_off00010708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10708 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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