Malicious PDF — malware analysis report

Static analysis result for SHA-256 30c507a76a682abb…

MALICIOUS

PDF

82.1 KB Created: 2021-08-14 07:15:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3dfa55c5e62afef09517cf3d1e221979 SHA-1: fa7e85fc5f58e00585d93fc91dfd8a379e72c8dd SHA-256: 30c507a76a682abb2f0d66fb96dc072f8d5ffebe8d6fe8a7fe87236b2e14b496
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan. It contains embedded JavaScript, which is often used to exploit PDF reader vulnerabilities or redirect users to malicious sites. The numerous external URIs, including one pointing to a raw IP address and others hosted on compromised WordPress sites, suggest a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://nomylo.ru/uplcv?utm_term=fiche+de+lecture+suivie+l%27oeil+du+loup PDF link annotation
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091989e9e952---26272578924.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/25806093799.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/fe9c4cf702d42fb398ce0b204c023e84/madowaferaxi.pdfIn PDF document text
    • https://unique-u.biz/images/uploads/file/ragefiromipebimofepokonir.pdfIn PDF document text
    • http://sskj.pl/userfiles/file/rugofozufejezedaziw.pdfIn PDF document text
    • https://teamcode.net/upload/files/22289407754.pdfIn PDF document text
    • http://vo23.ru/upload/file/risegipasa.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b60bcba0d40---fikam.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160962b27e97f7---71238492984.pdfIn PDF document text
    • http://geologocarmignani.com/userfiles/files/fanesetinologosubumeli.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/17253717641.pdfPDF link annotation
    • http://yournamebadges.com/withyourdog/cms_uploads/file/37172937467.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160d680006c52c---zixotexurezawivowekenake.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/438aaa259d788076de7efd79b9b62d11/39820224918.pdfIn PDF document text
    • http://jatyn.cn/upfiles/202107/file/1626238990.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/65856068676.pdfIn PDF document text
    • https://aashianarealty.com/file/fupizajudomoleduginuz.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202105/file/49948079958.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f95bda8a35---susojupuneterajag.pdfIn PDF document text
    • http://amandatour.ru/js/ckfinder/userfiles/files/46478708611.pdfIn PDF document text
    • https://barcelonacentremedic.cat/files/galeria/files/favurononuxudotezefi.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/16096e6c46980a---40231170972.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_off0000da5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA5F 19088 bytes
SHA-256: fb7e6434a81b21507dae9718d6b7db96d201267549302da619de406bb3982f53
font_01_sfnt_off000109e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E9 10520 bytes
SHA-256: 88a136716c82a76d56b105fc270993a68b2988b6440bf6336f5caeb1be5691ee
font_02_sfnt_off0001220d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1220D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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