Malicious PDF — malware analysis report

Static analysis result for SHA-256 09e9aafa67cc9c6e…

MALICIOUS

PDF

82.2 KB Created: 2021-09-01 11:53:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2bfcd5c469c391a768a0469f2f7fd20f SHA-1: 443e0a8296dd39b276fb9b2af740d07279e25c01 SHA-256: 09e9aafa67cc9c6eb349fa9d4f04a0dce2b4ef68121b75ef1b0bb2f7670c8434
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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 http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee3a62b7154---nobuzuredenexuligirin.pdf In PDF document text
    • https://sona3elkhair.com/userfiles/file/mudedekewaweb.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd756dd9c8.pdfIn PDF document text
    • http://kennycojewelry.com/userfiles/files/202108/1628922185.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff7c2bfcce---rodaloxijemarezul.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/6d0e87c135a18fab5d73e5214fbee317/87818579336.pdfIn PDF document text
    • http://seamacros.com/upload/file/6482514711.pdfIn PDF document text
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/99659936462.pdfIn PDF document text
    • http://mmbc.cz/_data/user_files/file/23917846698.pdfIn PDF document text
    • https://mattress-leader.com/media/bexodupub.pdfIn PDF document text
    • http://turhantur.com/turhantur/files/53709944176.pdfIn PDF document text
    • http://ltptech.vn/uploads/userfiles/file/rujunaredunabuwesibagube.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b7ecf38f5---mavakusipobitudiwig.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/5ff28f36e211f95f512bac308592a9fe/59949323678.pdfIn PDF document text
    • https://asesoriagade.com/app/webroot/files/files/zonulo.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1612a18f08f555---68385399100.pdfIn PDF document text
    • http://biotledlight.com/userfiles/file///82768301885.pdfIn PDF document text
    • http://italianopizzeria-pg.com/uploads/files/95454133414.pdfIn PDF document text
    • http://clinicaveterinariagussago.com/userfiles/files/90047131215.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1deb9538d---36768536152.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/63c9346fffe3b8b92a85e7430a260f89/96555269467.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f6e8554293e---gobivajesopajera.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=decaf+coffee+bad+for+youPDF 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_off0000de57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE57 10316 bytes
SHA-256: e48742c90271f950352a7bc136fa7cbce5f9646bc72af0d35e46b32a8b8a6cc7
font_01_sfnt_off0000f5ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010dcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCC 17672 bytes
SHA-256: ed2ca32cbf08c0b69a0276aafbb26cc1845257cc9d21da4aa4a3a47417b43c13

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