Malicious PDF — malware analysis report

Static analysis result for SHA-256 948014808d1b39a2…

MALICIOUS

PDF

86.5 KB Created: 2021-06-26 13:23:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4d452e274e04e66443c44c999b162a42 SHA-1: b166fee3629b41bbe70f618a3324fcbc464ccae7 SHA-256: 948014808d1b39a2dccb1ad7535741fb95717c9ea0e5cf810803e79ae7925737
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are designed to host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://garglob.ru/uplcv?utm_term=draw+io+draw+and+guess
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b76955961e7---30314754594.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f88ac40db---11096428106.pdf
    • https://projetounificado.com/uploads/files/gesomujiduxijanobuzijedis.pdf
    • http://assessmentinsight.com/ckfinder/userfiles/files/xigufeboxu.pdf
    • http://gaishachuukobuhin.com/js/upload/files/8452275532.pdf
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/ac55dnqfhj86m881m12d5ba004/gaxepov.pdf
    • http://arohitourandtravels.com/userfiles/file/zugeruviresaxuvux.pdf
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/d46l7vgufcpbs8g9c6qn3nie7r/kogewipepexitasujafud.pdf
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f59aa32fae---97976914677.pdf
    • http://hanboo.cn/Uploads/file/2021051811512270554.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714791e6b2c---13435563602.pdf
    • http://toddfamilyreunion.com/clients/4/48/482e924d5a052aa4a0c13eb8a30e0bc8/File/kalopivuvefunegidegira.pdf
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7a92d513a---7130693320.pdf
    • http://stlnsk.ru/uploads/file/54269981365.pdf
    • http://bandenplaats.nl/cmsimages/file/pekuna.pdf
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/sozazisasekiweduxivi.pdf
    • http://studioscoponi.eu/userfiles/files/42419706283.pdf
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/67878fcca24f5e2adcbe9157ed771768/56347223908.pdf
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/cfihfsc2fnfbhk9t86nb1tltb8/59560238981.pdf
    • https://lecapsuledigian.it/file/58360026880.pdf
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/9833ddf564f0679632c325cb87bf7002/53894850977.pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d26a.bin
5ede2f7dd7e47e0cb3903cfb8230b47b97097ca559beacf1cdcea0c56706c74f
pdf-font-stream PDF embedded font (sfnt) at offset 0xD26A 10468 bytes
font_01_sfnt_off0000ea1b.bin
b800f19c8983fed361e1ab1279810ca8d33bc70fc41479b4b558ceb38b081b97
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1B 19856 bytes
font_02_sfnt_off00010798.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10798 16792 bytes
font_03_sfnt_off00011faa.bin
b92b3cd2fb4f4461a72e37ed5ae2345fe7a20f67f93ac57bd1ed06cc66c02fa3
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FAA 17116 bytes