Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6b496fd6db8653c…

MALICIOUS

PDF

107.9 KB Created: 2021-08-21 14:14:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: b06960ba5515d2987dc9ac680dc04e24 SHA-1: b59b110fd15bf6f6f81b5834dcfd258d4f464766 SHA-256: e6b496fd6db8653c7c88876c946d5ba4297bffc3b1fa99888fa6bf039f4497cc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and a link farm pointing to compromised WordPress sites, indicating an attempt to host and distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. The embedded JavaScript is likely used to facilitate the download or execution of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9872

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://edgecs.net/documents/48857601274.pdf In PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/6472b1fd34f42f51636924c2fe60fb62/72448697415.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/npv43f0lu12k33i695v8t7mumo/dovijotu.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1284808dd---48078291225.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6c6ee3d49b---365554847.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081e3359196a---pexexatoferirawod.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/606cac7fca8e8937779e558509f2fe5a/18431546006.pdfIn PDF document text
    • http://djapm.com/userfiles/file/zekewogapedogofapuvi.pdfIn PDF document text
    • http://brette-animation.com/userfiles/file/jukuxetit.pdfIn PDF document text
    • http://cichanski.com/Upload/file/11353242270.pdfIn PDF document text
    • https://www.meditech.cz/ckfinder/userfiles/files/wuvotoleverovupobezil.pdfIn PDF document text
    • http://mariamozharova.ru/uploads/files/8438154311.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c6bccee9d---fudinage.pdfIn PDF document text
    • http://bygreenpure.com/userfiles/file/17880038850.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3e5786087---fubapodumaxeninik.pdfIn PDF document text
    • https://rlmahtani.com/userfiles/files/96903123967.pdfIn PDF document text
    • https://noddy.nu/images/file/90122762734.pdfIn PDF document text
    • http://www.tlo.ntou.edu.tw/ckfinder/userfiles/files/55300164038.pdfIn PDF document text
    • https://xn--pssa17sw71b.tw/upimages/files/zeneferigurupewa.pdfIn PDF document text
    • http://jagamimpi.org/contents//files/nogewalutozifu.pdfIn PDF document text
    • http://www.greenfield-sustainability.com/images/files/37684602227.pdfIn PDF document text
    • https://galerieportelouise.be/userfiles/files/54965304023.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/40224324106.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/03ba06a5d5e51e508764dd79f7444108/15704383275.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae9105c8f3a---fawoxebobubemekagirulebo.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/7b87bcadebea8e0f3208a3ec2816a30b/xafegemamimileseso.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aebd92ad38e---90609447613.pdfIn PDF document text
    • http://gaishachuukobuhin.com/js/upload/files/sadapagerujegusujewatun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=gta+sa+turkey+mod+finalPDF 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_off00013724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13724 22324 bytes
SHA-256: 06d653fc2f1f03e710b9a0a78ce4cb44c5a2bdcf8ca27b9f4d90ad1c52a5ac53
font_01_sfnt_off00016e9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E9E 10860 bytes
SHA-256: 1f0715aebc76887646b8c8c5eb4b9733e26795a2c80bcc72e944162c5f6e86c0
font_02_sfnt_off000187c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x187C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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