Malicious PDF — malware analysis report

Static analysis result for SHA-256 00247c42955eedb1…

MALICIOUS

PDF

80.2 KB Created: 2021-09-20 15:22:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 969bdf43e90e5dd0c28e4a3add86907b SHA-1: d91a0d5e541a0e3a649a8872a15738a896ac5d14 SHA-256: 00247c42955eedb1edf706e5618aae2c3fd97509642f3d777502dec4efbc0a74
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 WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or initiating malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://pistant.ru/uplcv?utm_term=synchronisation+outlook+avec+android PDF link annotation
    • http://utcsp.rustyramone.com/uploads/files/381024861.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/pikanej.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614188c0c9952---61052895707.pdfIn PDF document text
    • https://vcubusinesssolutions.com/userfiles/file/76722973191.pdfIn PDF document text
    • http://levakov132.ru/userfiles/file/rujawuxedujimobu.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613759a93bc35---81816128879.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130006948643---fikirerisogodowovesifile.pdfIn PDF document text
    • http://phamtrangia.com/upload/files/naxazelitefusotikepejowo.pdfIn PDF document text
    • https://mzr-avocats.com/buddha/ckfinder/userfiles/files/varepagib.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/161408ae95090d---xarizuzamaset.pdfIn PDF document text
    • http://tydafa.com/dafa/uploadfiles/20210913125046.pdfIn PDF document text
    • http://preciz.com/uploads/wysiwyg/files/sufisesekufixumegemu.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/0jctq3pbs4modvoai8lpgtrv07/dubagifoket.pdfIn PDF document text
    • http://thepokewave.com/uploads/files/nuxebomuludulefofo.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613e8b4050210---widuwivabasefopitilireve.pdfIn PDF document text
    • http://kalmi.ru/upfiles/files/dagetatut.pdfIn PDF document text
    • http://apismorava.eu/docs/jaderisapuvesoxavuliwad.pdfIn PDF document text
    • https://simon-daulte.com/ckfinder/userfiles/files/saxanugudaw.pdfIn PDF document text
    • http://sensor4you.com/fckeditor/editor/filemanager/connectors/php/fckeditor/upload/202109/file/nigifufexujafazevisime.pdfIn PDF document text
    • http://wecans.net/_UploadFile/Images/file/nudifete.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/5f7d409d6db172b7de3c15a1da88cc03/godenofunosaxijoxox.pdfIn PDF document text
    • http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/kosejeduliz.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613da368d88a5---23703647175.pdfIn PDF document text
    • http://myxroad.net/upload/userfiles/file///rijuf.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/d8822960005addc0631e9cdf9bf474ed/nizisojitusunatepub.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_off0000d524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD524 17276 bytes
SHA-256: daf8fa86ad9620de22cd19f693c94d9144b9539d5b2b602cc197d11fb899567a
font_01_sfnt_off000101e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000119fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119FB 10912 bytes
SHA-256: 70459b75dfcedcd416c1944e9f0e0d4ebed9a29470967a590891680e029d5289

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