Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ce95bcca6e5db04…

MALICIOUS

PDF

85.3 KB Created: 2021-07-14 06:47:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 645fb01d8378bbc70700c5c853fb2570 SHA-1: 411f3f34424ad40d9489b086e60f988c88865ba3 SHA-256: 2ce95bcca6e5db0401e9ce68e800a31039bead3d9a8a5a8d9a46c794d17b2caa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URLs and the nature of the link farm heuristics indicate a spearphishing attachment vector. No scripts were extracted, but the structure suggests it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/3cceo1i5hm71sfk87al55ao0c9/76211269904.pdf In PDF document text
    • http://alexhofford.com/temp/files/file/retisugoxajaxusiba.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b8f97a4e8b---karedunosudevemo.pdfIn PDF document text
    • https://shiokuda2.com/contents//files/62294041530.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d18ff949b8---navikudemanevap.pdfIn PDF document text
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/b2f8018e7a09756c89a31a3815ba485f/58891407395.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/t215l240r011qmugfnqn0b4ji4/sipegeluzug.pdfIn PDF document text
    • http://sladkiy-ostrov.ru/userfiles/files/6445640498.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c68dfa7ee3c---63859837580.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/2f6808c446473b5b5eda883e0ba1e934/rerakafitizosatidaweg.pdfIn PDF document text
    • http://jsdarvin.com/files/38133962787.pdfIn PDF document text
    • http://dungcubepgiangtrinh.com/webroot/img/files/26453043392.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8487da374cda0f974ad283b1d1b994a5/zutunukiditojovezabile.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e665da33b1---dowujuke.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc36519359---varipapabajolowitazumu.pdfIn PDF document text
    • https://deltagroup.bg/uploads/file/jusokunez.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/npjng248u2rogr6jq4cvhh2ec1/wajawek.pdfIn PDF document text
    • http://vamaconsulting.sk/userfiles/file/xefijufofimepitixofon.pdfIn PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/6734055521.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210504220752.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-6-28/20210628164754717963.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160b0734320747---tijudokinadopovezeb.pdfIn PDF document text
    • https://menu2uplus.com/images/file/vezuselidobosoxagibumis.pdfIn PDF document text
    • https://apsco.ly/userfiles/files/tizapago.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/ac93b92c915e618904100a9f4eec0b96/88967033309.pdfIn PDF document text
    • http://webbuilders.com/files/file/zujujigifofevolusi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=sign+document+on+macPDF 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_off0000ec9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000104b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B6 10576 bytes
SHA-256: e04d0a19f1dfb0aa51502fac1e806c1e5dbdf6d99b68eaaeabe41588c7cc86c4
font_02_sfnt_off00011ca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA2 16688 bytes
SHA-256: 706e43f022ac79175937c81f31e4fd877b4a3fc760ccf825397ccaf913105fea

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