Malicious PDF — malware analysis report

Static analysis result for SHA-256 5012ed3b7ebb5cab…

MALICIOUS

PDF

69.8 KB Created: 2021-09-25 15:54:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8de5ea59110af1be09d98a07590275e8 SHA-1: ece58a51ed8a1e6e7d9336ab0d336e465fba21ef SHA-256: 5012ed3b7ebb5cabb31e4a2bda2e5b6ecd5a4963493689cadb5df08ab5de2c5f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to redirect users to malicious websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high number of links to potentially disposable domains, suggesting an attempt to obscure the true malicious destination. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://ghalemdi.com/userfiles/file/63189017863.pdf In PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142c530a00d1---bagorewalomu.pdfIn PDF document text
    • https://www.sensormaticltd.com/app/templates/js/ckfinder/userfiles/files/namogefigakunazogup.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-9-25/20210925072131499231.pdfIn PDF document text
    • http://okcashbagusa.com/uploads/files/kerubogafumex.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614f0329a48e6---kupuletuzapuje.pdfIn PDF document text
    • http://huzatfokozo.hu/editor_up/43954033137.pdfIn PDF document text
    • https://zevkotodoseme.com/upload/ckfinder/files/xafewepido.pdfIn PDF document text
    • https://nibrasimansch.com/userfiles/files/44058875093.pdfIn PDF document text
    • http://kelvista.lt/images/files/18090830743.pdfIn PDF document text
    • http://quick-thailand.com/images/uploads/file/54189873338.pdfIn PDF document text
    • https://fratellifurloni.it/file/wasafakuzuxutavefiromojal.pdfIn PDF document text
    • https://restaurant-kamkok.fr/img/Data/file/62991120675.pdfIn PDF document text
    • https://terminarz.online/kosmetyczka/krakow/files/96876217663.pdfIn PDF document text
    • http://www.bash.cl/media/file/36012024536.pdfIn PDF document text
    • https://epagneuls-bretons.fr/caningest/images/file/batufe.pdfIn PDF document text
    • http://101-games.ru/images/uploads/files/95315301899.pdfIn PDF document text
    • http://richardchong.com/userfiles/files/pilajifopin.pdfIn PDF document text
    • http://www.ocptecnology.com/admin/uploaded/fck/file/jawupovuwosixelagaxaxa.pdfIn PDF document text
    • http://paradoxine.com/upload/files/gilunamorakuxowozos.pdfIn PDF document text
    • http://ceraunavoltapizzeria.it/userfiles/files/duratisevebanusato.pdfIn PDF document text
    • https://www.domosystem.gr/ckfinder/userfiles/files/nesonemeruzinik.pdfIn PDF document text
    • https://h16hr15k-h19hr37urn.com/contents/files/48059398988.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=live+line+cricket+apkPDF 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_off0000af28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF28 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c73f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC73F 10196 bytes
SHA-256: 420e56c96fe8b3aa525fe1c6eb78be233254f18e0a2ddf24626a9cf22f590434
font_02_sfnt_off0000de2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2E 16916 bytes
SHA-256: 410e80a2f195c0c091abab63b11b6ecc4925429a406dcf76b84a1e13bbf6bc12

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