Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9693233627a3530…

MALICIOUS

PDF

124.0 KB Created: 2021-07-04 05:48:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f4980340bbd6d71e17578f9d9ef1883b SHA-1: 9edb51d326eed5e863973ff2dd271f7a176d459c SHA-256: e9693233627a35306d21951c5b7e0b038a06c808fb803913968584cbc33fad57
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is identified as a link farm pointing to compromised CMS uploads and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware sites. The presence of embedded JavaScript suggests it may be used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9825

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://aduanaldelvalle.com/userfiles/file/digokidexagulibam.pdf In PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb3f069425---fofebebedisunezam.pdfIn PDF document text
    • http://carriewoodfamily.com/clients/5/5b/5b9f2fb360c4065436fb7fe1267c3612/File/bukelinudagef.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160748667a5d51---xemuziwa.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160aa45b38ef53---73297318269.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/bubixexuregogetutotebobax.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609a50ae6c4c7---xaromugubopijex.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608774d515430---tumejojido.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/486e46fc74d39754c1bb8eee81912822/sogowazavebezugikovifaxo.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/16081655f702bb---mofuvabenezigome.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/n1sq7uns7br2vbv0tnhsfdrd2r/rodogukidexejaxi.pdfIn PDF document text
    • https://kindeeyudee.com/ck_files/files/26879428866.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/649c7e33758fd89e5905b1855bc4e5cc/butileru.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/tiritopijejolologazewam.pdfIn PDF document text
    • https://prawobrzeze.info/userfiles/file/61941444835.pdfIn PDF document text
    • http://sanmarinreunion.com/clients/c/c0/c0747301521b2fcd71a0106c9132c7e7/File/dosekika.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/67842884993.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/40550662085.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160822ce28854d---bujogafezobapiz.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c07efb8947c---nijevovoweluxefadud.pdfIn PDF document text
    • http://sk-massimo.com/js/upload/files/47984871525.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/7chtdoq2foqcc7gi3optcj35q1/dafegapejosugotijujafuvo.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160852f3d229ef---donedutotatir.pdfIn PDF document text
    • http://timebank.ru/sites/default/files/photos/pagefile/rudetajiritadag.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/28213198309.pdfIn PDF document text
    • http://bygreenpure.com/userfiles/file/kulipamadirozala.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/0r321lcrpe60o4urj7438o0055/16259613230.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=make+sentence+of+complimentPDF 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_off000181c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x181C5 17888 bytes
SHA-256: a8a1efb1fe94de5877802377fc3f0cf823ce8b44a13cf08ef21304a52dc491d2
font_01_sfnt_off0001b056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B056 10628 bytes
SHA-256: 16c207de01df3a8c4f46fb11d0316fe976492eba3bd419103408de6e6266f7a1
font_02_sfnt_off0001c8aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C8AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1