Malicious PDF — malware analysis report

Static analysis result for SHA-256 ade7c3fd096b616f…

MALICIOUS

PDF

107.9 KB Created: 2021-09-08 12:26:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: a66289dadc032aec3bbf9aa2a13bf748 SHA-1: 31e4108c9f1ad51a6f097e83b457dc5eff1b5b28 SHA-256: ade7c3fd096b616f1dad4766577e82ba94d48bb5df677c9642d24324b9268f7a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links to external websites, with a specific heuristic identifying it as a link farm on disposable hosting. This suggests the primary purpose is to redirect users to potentially malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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 http://vegman-kzn.com/ckfinder/userfiles/files/65742811062.pdf In PDF document text
    • http://vizugy.hu/uploads/files/40363873493.pdfIn PDF document text
    • https://bdprescription.com/ci/userfiles/files/bomute.pdfIn PDF document text
    • https://nomortiga.com/contents/files/34681539028.pdfIn PDF document text
    • http://bidwoodmachine.com/d/files/64912373632.pdfIn PDF document text
    • http://westfallassociates.com/documents/file/16184703238.pdfIn PDF document text
    • http://e68momo.com/shopadmin/upload/files/denavema.pdfIn PDF document text
    • http://villahetzwartepaard.nl/survey/userfiles/files/boludet.pdfIn PDF document text
    • http://budapesticukraszdak.hu/userfiles/files/xogarimusiwefuriz.pdfIn PDF document text
    • http://anninh247.info/upload/files/denubo.pdfIn PDF document text
    • https://lentes123.com/aym_image/files/rinegal.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/161319b4ce58ec---83774264119.pdfIn PDF document text
    • http://go-pxl.com/uploads/files/92922135538.pdfIn PDF document text
    • http://nesemlak.com/test/images/uploads/files/38795942503.pdfIn PDF document text
    • https://speculatio.in/userfiles/file/87354019900.pdfIn PDF document text
    • https://maydangson.com/vietkiendo/upload/file/wugufunitoja.pdfIn PDF document text
    • http://ladyvenus.it/userfiles/files/53580149715.pdfIn PDF document text
    • http://cosmik-kinoteatr.ru/sadm_files/1905158940.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/4540743571fd7a84f41b5e4c9fc122dd/bodomanelezaloxezuji.pdfIn PDF document text
    • https://olivermilk.vn/tctt/sites/aaa/file/genowesemirefekidupakimu.pdfIn PDF document text
    • http://studiobonvino.com/userfiles/files/69094463638.pdfIn PDF document text
    • http://ndt-ultratech.com/files/ligusobinuruwidegisi.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/guwewigigir.pdfIn PDF document text
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/4170391090.pdfIn PDF document text
    • https://tractorpulling-emmeloord.nl/upload/file/8482695258.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=ge+zenith+transfer+switch+manualPDF 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_off000141cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141CD 17980 bytes
SHA-256: 1e67f4bfd9874a91282c41ea41149dfbde40a34b2068bd876b7f5880a8c248ec
font_01_sfnt_off00017105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17105 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001891c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1891C 10768 bytes
SHA-256: 885bc98f171a15108bb970f43e3680a3076960474a00b01df989b1d1656eb60d