Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdbca429a48815e3…

MALICIOUS

PDF

78.0 KB Created: 2021-07-12 16:26:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b03475aa21eb65508c379c3f667d5108 SHA-1: b7cba0364e40ba5a75b9d458193fe72b8e0838d6 SHA-256: bdbca429a48815e3cba46c78f7c26168cb253b0a15908d570beab80a5afd64f5
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 8

  • 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.
  • 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://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/539da16c97dab51f3285b7bf60d34f05/wuribisijawodilew.pdf
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16088080221883---kozolikasawi.pdf
    • http://tlproduct.com/userfiles/file/moxevixuxodeti.pdf
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/7921a751d308011e42b66181d2caaff9/23444634470.pdf
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/89a7c477f44a44be5da6fda978350cea/9841592494.pdf
    • https://anukulagrotech.com/ci/userfiles/files/83957245858.pdf
    • https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/ligojujozeteseziwe.pdf
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16075a78197ac4---88355882158.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d74958084---xitetuxiredevazukokoxete.pdf
    • http://chiaranannini.com/userfiles/files/ratugaduwerelesabixugoga.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160a2aae2341c9---xitixuxasulewizinifatanu.pdf
    • http://ipmarketing.net/userfiles/file/xasatizikulinimemoli.pdf
    • http://volvo-cars.jp/js/upload/files/redoradibalezef.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb460d99115---45227067447.pdf
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c84523e06fac66a884d6085abb07c4da/jigokakuganidezov.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba3c57c772---56194555516.pdf
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b05d97273---26935424243.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac863617d61---merebi.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/d6d7613c58bf526db9bb96063ade5620/fedagewajuxinafivab.pdf
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/j0n4g70fa9omm05acur9pacf18/nelurutudamidupuvule.pdf
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160709dfa4ba83---balajasojesiboj.pdf
    • http://seattleteriyaki3.com/uploads/files/tiduvugop.pdf
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/4a5f015a5075c9a10e47009a0a765ec6/42672495388.pdf
    • https://grnca.org/img/files/files/24804162927.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=list+of+evangelical+churches
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf6d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF6D 16792 bytes
font_01_sfnt_off0000e77f.bin
2286e0f3bb933335015e2b0b11708752da14fc78fa5e8716640c0d99b7564527
pdf-font-stream PDF embedded font (sfnt) at offset 0xE77F 16428 bytes
font_02_sfnt_off00011223.bin
0de8554cea7291fe9b370a9c4b46fc3bd7f9a090755d8a0c034eb1bace5b1b01
pdf-font-stream PDF embedded font (sfnt) at offset 0x11223 10740 bytes