Malicious PDF — malware analysis report

Static analysis result for SHA-256 17ea0ac7370d4af8…

MALICIOUS

PDF

242.3 KB Created: 2021-08-17 16:59:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 1ca044578cdd8fb9c2fe845e13153f17 SHA-1: a386ceddabdca23d4445122afd5466ec9afe7676 SHA-256: 17ea0ac7370d4af8eb97fff29ab66e0d369139684d0a4249c736fa1010a7af6f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous embedded URLs, many pointing to compromised WordPress sites or unknown domains, suggests a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the PDF structure and URL farm heuristic point towards an attack pattern designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9339

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
  • 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.
  • 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://mimpiindah2.com/contents//files/refexegoxototomizijiki.pdf In PDF document text
    • https://cosmopolitanhotel.eu/uploads/wysiwyg/files/fisemelivixisolevarete.pdfIn PDF document text
    • http://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/kutejamasezowuxotel.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021071700182762.pdfIn PDF document text
    • https://zegaoyun.com/calisma2/files/uploads/zewosij.pdfIn PDF document text
    • http://woorymart.com/userData/board/file/nadomemizojikofaz.pdfIn PDF document text
    • https://houstoncoinclub.org/FCKeditor/file/wisepuz.pdfIn PDF document text
    • https://unosms.us/userfiles/file/30420510095.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/8270a4f716931995e3a53aa57ac62eaf/6035823737.pdfIn PDF document text
    • http://wheatland1971.com/clients/25033/File/rijirekoboromunenoz.pdfIn PDF document text
    • http://osteriadelcampanile.com/userfiles/files/luxesaxatemijuwepo.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/letoviri.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6ba3a05d2---90227870630.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609911c9868a9---41448510121.pdfIn PDF document text
    • https://computerzone.pk/file/27800360120.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609d32a9f3f2d---2757034680.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/rcv2vqhtv9rujjeg5skhe1o8b7/pawuragixi.pdfIn PDF document text
    • http://iphysiology.ru/upload/kurejejo.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16078d1d0963d3---pejizasoxevuritof.pdfIn PDF document text
    • http://sport-way.ru/img/file/20336786636.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098ad3da1adf---pefuloxipibida.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/e6237ea760ca45e385a3f24d38305409/86055619098.pdfIn PDF document text
    • https://keongracun.org/contents//files/faximoxal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=fahrenheit+911+summaryPDF 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_off000355c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x355C8 20728 bytes
SHA-256: fb767cf702a128c0f6e879f7f9cd52635558f9cb5f15382bc495d096a6f1449b
font_01_sfnt_off0003894b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3894B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0003a162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3A162 10620 bytes
SHA-256: 8f3338d1189f5a69233bcaed6c6f3926994711adaaa8508a014006208b874765