Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce830d39baffb003…

MALICIOUS

PDF

82.2 KB Created: 2021-09-04 14:08:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 83df12beac2c978d4ac0529d58151baf SHA-1: ac24003e63d46f2608e89d6164fefa7243763429 SHA-256: ce830d39baffb00379ab9171d4a2e3304e00efeea24a8a3370894a95dca356dc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites, suggesting it's used to redirect users to malicious content. The presence of embedded JavaScript indicates an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9253415ec9---17874090502.pdf In PDF document text
    • http://piannocreativo.com/js/new/fckeditor/userfiles/file/41276717046.pdfIn PDF document text
    • https://dineflon.com//files/pubesemafojuk.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/bqtjqv1e5g1p7hd3uqrtgt0379/veberekoza.pdfIn PDF document text
    • https://travelworld.ro/userfiles/file/jepufelatuteta.pdfIn PDF document text
    • http://pasaru.com/upload/files/14223804775.pdfIn PDF document text
    • https://montpellier-business-plan.com/mbp/upload/images/images/upload/ckfinder/52173945830.pdfIn PDF document text
    • http://isagenixmakessense.com/ckfinder/userfiles/files/muzalagomizegurolugo.pdfIn PDF document text
    • https://eliteplacementagency.com/uploads/files/doliwabume.pdfIn PDF document text
    • https://eventpro-kontraktorpameran.com/uploaded/files/gotufetamevutenidalorusof.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d905e7978b---dotim.pdfIn PDF document text
    • http://cokhihoangvinh.com/uploads/userfiles/file/ronitigufosavaxodokobokir.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd44ef96994---wepubi.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612e3d03d71d7---zipamuxewukafu.pdfIn PDF document text
    • http://hotelamadeustorino.com/userfiles/files/30416145606.pdfIn PDF document text
    • http://popnmusic.fr/userfiles/file/vojaxijokafodasi.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9ca302f827---82577592356.pdfIn PDF document text
    • https://metnar.pl/web/uploads/files/24918430923.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/dn5q5jfghmnorjh5t7tbpmp1o7/83629368185.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609102c4381e4---33376720002.pdfIn PDF document text
    • http://biomisszio.hu/tmp/tisagadadikewixewilefesi.pdfIn PDF document text
    • https://chrmglobal.com/userfiles/file/pifavivarure.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=convertir+numeros+decimales+a+fracciones+pdfPDF 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_off0000d86a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD86A 19324 bytes
SHA-256: 2f4b7a9bd5275add350f37abae6b5fe8dda66203bda0fe19abb00352033502e7
font_01_sfnt_off00010975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10975 10976 bytes
SHA-256: a3a4c51ab3418bac682c10a7befe14d93433a8c1c7e92536cfda7f02f3cbbe6e
font_02_sfnt_off00012300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12300 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.