Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa176a6081c0452f…

MALICIOUS

PDF

79.3 KB Created: 2021-09-20 06:23:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5d65ccadd8b82d3f7ea4203c941760e0 SHA-1: 0fc4f48e17892c722b391b336fa96cc3a6677df9 SHA-256: fa176a6081c0452f75c141216d4ee55b482c9f82971231ce87abc83b0f89a5fe
142 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample contains embedded JavaScript, identified by PDF_JAVASCRIPT and PDF_JS heuristics, which is a common technique for executing malicious code within PDFs. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely redirects the user to one of the numerous suspicious URLs found in the document, such as 'http://everbeenmagnet.com/js/upfiles/files/bifoxazinobilege.pdf', to download further payloads or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • JavaScript action low 1 related finding PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://securitydm.eu/slicice/file/30572209932.pdf In PDF document text
    • http://everbeenmagnet.com/js/upfiles/files/bifoxazinobilege.pdfIn PDF document text
    • http://wsm.hk/images/files/mopulotid.pdfIn PDF document text
    • http://platypusspot.org/uploads/ckfinder/userfiles/files/guluzarapewa.pdfIn PDF document text
    • https://www.la-melodie-des-saveurs.fr/ckfinder/userfiles/files/21999888858.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/161305157ab11e---82532499953.pdfIn PDF document text
    • https://incoyun.com/calisma2/files/uploads/44130406959.pdfIn PDF document text
    • https://samsunyapi.com/userfiles/files/58767955296.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16132bfac65a4e---83404753405.pdfIn PDF document text
    • https://pensiunea-escape.ro/ckfinder/userfiles/files/mofepi.pdfIn PDF document text
    • https://regiefranchet.fr/userfiles/files/50599206857.pdfIn PDF document text
    • https://www.l-games.jp/js/ckfinder/userfiles/files/32489561836.pdfIn PDF document text
    • https://hnhaa.com/userfiles/tnejp/files/51622359038.pdfIn PDF document text
    • http://avanti.pl/userfiles/file/42685406417.pdfIn PDF document text
    • https://es21sys.com/userfiles/file/82024557293.pdfIn PDF document text
    • http://baaningdoi.com/file_media/file_image/file/40409851768.pdfIn PDF document text
    • http://sola-brothers.com/userfiles/file/dugikom.pdfIn PDF document text
    • http://royalwedding.jp/images/blog/file/8150443600.pdfIn PDF document text
    • https://paidionresearch.com/userfiles/files/58569378063.pdfIn PDF document text
    • http://artwatch.ru/userfiles/file/79285809656.pdfIn PDF document text
    • http://extrastyle.ee/ckfinder/userfiles/files/83380665446.pdfIn PDF document text
    • https://seedcambodia.org/htdocs/cljr/data/files/xaloreg.pdfIn PDF document text
    • http://ekogamma.pl/javascript/ckfinder/userfiles/files/kigulewuwuvuxiwizamogela.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/lokaf.pdfIn PDF document text
    • http://bibliotekaludwin.pl/img/upload/files/72661119447.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=download+modern+warfare+2+for+pcPDF 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_off0000d52a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD52A 16044 bytes
SHA-256: 8853a9becde038d3bf1d2acc554f41185b2882a1852751ac62eb2e0f499fe5f4
font_01_sfnt_off0000fe7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7E 10632 bytes
SHA-256: ff980c38b81c6d126260773858a3e72048ee7367cf79b1eaaef0d6a6a6b458df
font_02_sfnt_off000116e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1