Malicious PDF — malware analysis report

Static analysis result for SHA-256 272079c666254c41…

MALICIOUS

PDF

80.7 KB Created: 2021-09-21 00:18:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fa3cfb23c26dd7f6b1b6d076b5a96d31 SHA-1: d7a69bf573f516cef6f303a2504a21136648879f SHA-256: 272079c666254c410422a566b89504e3a416612c01c1e1013812586fca6cc149
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to websites hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 http://sivam.pl/files/file/xutokanuxuwifubapax.pdf In PDF document text
    • http://coconut.hu/userfiles/file/88387630799.pdfIn PDF document text
    • http://intemhathanh.com/img_duhoc/files/23548771999.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613be90031b24---nofugapetilifamowosa.pdfIn PDF document text
    • http://maquinandoysubastando.com/dleyes/admin/fotos/file/zatepimetofomovete.pdfIn PDF document text
    • https://lrsdev.com/userfiles/file/dixixagafajebo.pdfIn PDF document text
    • http://hoadon-dientu.net/images/files/baxufezosetawunujinejofoz.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/276438259c276abe514bf29a55a6017a/20292567667.pdfIn PDF document text
    • http://poexali.org/static/image/_u/system/files/10060147594.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/benipi.pdfIn PDF document text
    • http://sbs-group.co/userfiles/files/mopomufarugowafozuwutuwiw.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/m05l45dm7mogj15cielk9gdn48/85142332422.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/ponaz.pdfIn PDF document text
    • http://rassadaspb.com/new/files/file/fisirotufodaxogemefujaw.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/f9b0928c2442ac09fd47232af42a7b15/36899477601.pdfIn PDF document text
    • http://polandpools.com/contents/files/vaxaniguxizomitezitakuweb.pdfIn PDF document text
    • http://lumieye.com/userData/ebizro_board/file/69273615226.pdfIn PDF document text
    • http://jinsonmetal.com/Upload/file/zivujiwotujejexi.pdfIn PDF document text
    • http://peak-experience-japan.com/images/blog/file/82918397220.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/c2d67ad7866766fc72dd84871e83436d/37139877354.pdfIn PDF document text
    • https://jeanmarcrobion.fr/userfiles/file/26427201682.pdfIn PDF document text
    • http://gyogytornasziget.hu/uploads/files/zedur.pdfIn PDF document text
    • https://simon-daulte.com/ckfinder/userfiles/files/loponine.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=driving+games+frivPDF 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_off0000db53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB53 10360 bytes
SHA-256: f1162cc413f5baa3d6103993d6df86817dcbf7fce9b76abb9d1088e4098dcd3c
font_01_sfnt_off0000f2b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B7 16768 bytes
SHA-256: 75414795e8650489ff5f67f87d0720c82af453aba45977047816e28b75deb9db
font_02_sfnt_off00011dce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DCE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1