Malicious PDF — malware analysis report

Static analysis result for SHA-256 17a9b9f729e24bb3…

MALICIOUS

PDF

99.8 KB Created: 2021-09-22 10:19:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 589081d611d719671ae0ff97c5df8859 SHA-1: 93ddff24bc2ff8091b1200d6c09a5274f47f7cb8 SHA-256: 17a9b9f729e24bb3c53a8d6e6619d9a012c2744b9a0dbbb02b6db276e59ecb72
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded URIs, including one that points directly to an IP address and others hosted on compromised WordPress sites, suggesting a phishing or malware distribution attempt. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, providing no direct user-facing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://medvor.ru/uplcv?utm_term=tell+me+a+story+season+1+episode+1+123movies PDF link annotation
    • http://etkindenetim.com/resimler/files/wekufavuwefelagazab.pdfIn PDF document text
    • https://savitravel.ro/ckfinder/userfiles/files/66370034536.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1613090b4d2ea0---zivutumor.pdfIn PDF document text
    • http://lamarchesainterita.be/lamarchesainterita/imgdb/news/files/50002195951.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/425f02215a07e1cb5aae9732350b2436/14705476424.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/161383711a3897---womudirejapobugiviwe.pdfIn PDF document text
    • http://tlumacz-lipno.pl/pdrzewiecki/files/1401654446.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f5bab8acfc---vuvoluwevajalozujivevemew.pdfIn PDF document text
    • http://galeriejacqueselbaz.com/userfiles/file/85031479003.pdfIn PDF document text
    • https://zifu-tech.com/app/webroot/userfiles/files/vidamedupanebilu.pdfIn PDF document text
    • http://akademibt.com/resimler/files/58702085463.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/fcb78eadea762b54ed990301c54993c1/jogejupepasufuti.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/64a8d7267c90ea534961fe8a061367fa/raxugokeduwuguxe.pdfIn PDF document text
    • https://pre-www.bridge-college.com/uploaded/ckeditor/files/lufupiguxaf.pdfIn PDF document text
    • http://architettorobertafasola.eu/userfiles/files/41108106340.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134681ccdd6a---20633794450.pdfIn PDF document text
    • https://charteriraq.ir/basefile/charteriraqir/files/tupezifibiwajepujeweti.pdfIn PDF document text
    • http://abcgsgeds.friendship-match.com/upload/files/33412443867.pdfIn PDF document text
    • http://jia-longsofa.com/uploadpic/jialong151126/files/202109021911482723.pdfIn PDF document text
    • http://easternhoteljeju.com/FileData/ckfinder/files/20210902_909B3EA2B6CEF31F.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/14640033156.pdfPDF link annotation
    • https://kiaavcilar.com/upload/ckfinder/files/zekagogigiponidodijelog.pdfIn PDF document text
    • http://www.rodnolespropertymanagement.com/siteuploads/editorimg/file/zisuriwedazobud.pdfIn PDF document text
    • https://goez3.com/10005001208290177/ckfinder/userfiles/files/85201327508.pdfIn PDF document text
    • 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_off00011a65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A65 11040 bytes
SHA-256: 31e86906e9235df8ef65ef98634b0eaa604eeb1ea642f05398bed0821232e01b
font_01_sfnt_off0001342d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1342D 20248 bytes
SHA-256: a7ca6a40770f32a8bd18fec798cbaa4e723a5c066fe988670e895a5820883125
font_02_sfnt_off00016973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16973 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1