Malicious PDF — malware analysis report

Static analysis result for SHA-256 339e1559e8eb7498…

MALICIOUS

PDF

75.9 KB Created: 2021-09-20 00:59:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9d75504c625d3593394e5a2a983af82e SHA-1: 74379a2a7575b5e20564724250b065f3415b0bae SHA-256: 339e1559e8eb74982b26439547d70786eeec109c86e25cd102d97424ba227924
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which are likely part of a link farm designed to obscure the final destination. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a high likelihood of malicious intent, such as phishing or malware distribution. ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://cahayamimpi1.com/contents/files/robos.pdf In PDF document text
    • https://immsac.pe/sgi_userfiles/userfiles/files/69744420943.pdfIn PDF document text
    • https://greenbins.ca/ckfinder/userfiles/files/64882741295.pdfIn PDF document text
    • http://ksnjl.com/userfiles/files/85203906322.pdfIn PDF document text
    • http://espaciocultivarte.com/ckfinder/userfiles/files/porogefodupazimadaramejo.pdfIn PDF document text
    • http://phatnang.com/media/ftp/file/zurexijojilerutome.pdfIn PDF document text
    • http://coiffurenais.com/userfiles/file/xinor.pdfIn PDF document text
    • https://adikmanis.com/contents/files/mapomololavawomofutinofux.pdfIn PDF document text
    • https://rowanmkt.com/Uploads/ckfinder/userfiles/files/40819686817.pdfIn PDF document text
    • http://salwex.hu/file/24307937512.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/13795473059.pdfIn PDF document text
    • https://encoyun.com/calisma2/files/uploads/56022229970.pdfIn PDF document text
    • http://yourhealthyanswer.com/ckfinder/userfiles/files/96659045657.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135518d1aee5---xiriwisonukakinasikejuse.pdfIn PDF document text
    • https://crownprolaw.com/userfiles/Proj_Name/files/fijonobovifolero.pdfIn PDF document text
    • https://tideandtigers.com/ckfinder/userfiles/files/6092331875.pdfIn PDF document text
    • http://purplebyanki-com.bvirani.com/ckfinder/userfiles/files/15077040207.pdfIn PDF document text
    • http://gazdalkodjokosan.hu/img/userfiles/file/371523137.pdfIn PDF document text
    • https://sealordhotels.com/ckfinder/userfiles/files/726623979.pdfIn PDF document text
    • https://keralatemples.info/ckfinder/userfiles/files/21855119053.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/95505267556.pdfIn PDF document text
    • http://kdekdyjak.cz/data/xivodifovanep.pdfIn PDF document text
    • http://havefuntogether.com/image/upload/File/84821733625.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/svuo3hka8diaqtos0105q56te4/bitejuxopurixagamudovesa.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/76041001650.pdfIn PDF document text
    • https://mfdesign.hu/files/file/15369073196.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=cooking+mama+androidPDF 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_off0000ca2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA2B 10272 bytes
SHA-256: 6d58bea05e885123b611da4a0ba07905d3ced4aec70ad7733cfcd792bac57954
font_01_sfnt_off0000e100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE100 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF912 16056 bytes
SHA-256: 842906402d365c8235d74b0970b758032615b9a37164fea70e5bdbf119cba876