Malicious PDF — malware analysis report

Static analysis result for SHA-256 499414d4a0ae48b9…

MALICIOUS

PDF

80.6 KB Created: 2021-09-16 01:48:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c811da58423af488192dd039143bafbc SHA-1: dd6509814e28893db4da27cfad69f15d682be2c5 SHA-256: 499414d4a0ae48b908130a70311c8ffbeed2312e362c54039d97973d301d5c9e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a link farm pointing to multiple compromised websites, indicating an attempt to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a phishing lure or a downloader for further payloads. The embedded JavaScript is likely responsible for initiating the redirection or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ketchas.ru/uplcv?utm_term=12+mb+game PDF link annotation
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161320b93c5a00---luwiwivukel.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/p6cf22d3o9r0t1tr2n2td9hm7kpsqtrk/42614629352.pdfIn PDF document text
    • https://blogsma.com/files/menevo.pdfIn PDF document text
    • https://resttour.com/images/userfiles/files/82817522955.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/wizakedosebusidoda.pdfIn PDF document text
    • http://hwayoung.kr/upfile/files/nazowizoserutowopepibiwo.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/3311febede94875a83dacf57483ace4f/14172264848.pdfIn PDF document text
    • http://portofmiamitunnel.com/system/js/back/ckfinder/userfiles/files/tinalowabomutafuwokubedak.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/155dbef041dcdbf00b4116118a7558c8/xekotaruru.pdfIn PDF document text
    • https://emtracing.net/userfiles/file/94680978445.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/30417113660.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/161426507d848e---70399107885.pdfIn PDF document text
    • http://davidhammerstein.org/ckfinder/userfiles/files/dexudazeb.pdfIn PDF document text
    • http://thrifty-uy.com/files/others/sesisematov.pdfIn PDF document text
    • http://registermycompany.in/admin/userfiles/file/74314773307.pdfIn PDF document text
    • https://shastriratanchatterjee.com/ckfinder/userfiles/files/69469774949.pdfIn PDF document text
    • http://faisaltowel.com/survey/userfiles/files/zatavaworipololeniziwab.pdfIn PDF document text
    • http://kpotplace.com/uploads/files/radufagawetet.pdfIn PDF document text
    • http://pitin-akutsu.com/js/upload/files/rapotakutejiponovez.pdfIn PDF document text
    • http://snailgame.ru/upload/files/20210916051135.pdfIn PDF document text
    • https://joebalogh.ro/imagini_ws/fobixulibu.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/kewafubofuj.pdfIn PDF document text
    • https://majubesar.com/contents/files/49535991011.pdfIn PDF document text
    • https://barrier.exma.cl/ckfinder/userfiles/files/75047464399.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_off0000d9b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B1 9936 bytes
SHA-256: 629b966dd36545872b21d02bffc3db1d2653a7dc1e7434105f76ba5fdaeb2d86
font_01_sfnt_off0000efb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB0 17440 bytes
SHA-256: 11560165120bb9fd9881a5910197d2992d4177c887d823f1a20517d6e688fa4e
font_02_sfnt_off00011ce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.