Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5ba9035837a4153…

MALICIOUS

PDF

68.8 KB Created: 2021-09-27 17:12:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 97a5c064add71074545d9fce7cdcaca9 SHA-1: 0469aca30155bfdbd29d422ff28032d68e3a4f60 SHA-256: f5ba9035837a41530894c3b2c5e8201b2bf7a67ea0635084056021d18c3555dc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://chcial.ru/uplcv?utm_term=the+bros+2017+torrent PDF link annotation
    • http://abwingscolley.com/uploads/files/53344088439.pdfIn PDF document text
    • http://dichvumucin.com/upload/ckupload/files/18430301563.pdfIn PDF document text
    • https://computerzone.pk/file/11492686455.pdfIn PDF document text
    • https://charterboatdeliverance.com/uploads/files/25129561222.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148ca093d054---kofixirotadilokubana.pdfIn PDF document text
    • https://fa-vietnam.com/webroot/img/files/4725694140.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130457df012c---fiwuvitijinezavewubatiz.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132a624eeb2a---86662762158.pdfIn PDF document text
    • https://granitnet.hu/editor_up/dumaditej.pdfIn PDF document text
    • http://xn--80adpfaaeictf0c6c7i.xn--p1ai/public/file/guxafanufabukefubeki.pdfIn PDF document text
    • http://aumnat2car.com/ckfinder/core/connector/php/upload/files/11400029385.pdfIn PDF document text
    • https://marupyara.com/fotos/userfiles/file/jokijimere.pdfIn PDF document text
    • http://cmtdental.com/upload/ckimg/files/kegurukurakolulufopobomo.pdfIn PDF document text
    • http://rasmesafar.net/basefile/basefiles/58355007163.pdfIn PDF document text
    • http://le383.com/uploads/files/71394806424.pdfIn PDF document text
    • http://productinfo.in/konadnew/userfiles/file/fajagawanojis.pdfIn PDF document text
    • https://muachungbaohiem.com/uploads/userfiles/file/48891902460.pdfIn PDF document text
    • http://platypusspot.org/uploads/ckfinder/userfiles/files/nakijewekuru.pdfIn PDF document text
    • http://www.agenbenangbandung.net/file/nekukerisatudereval.pdfIn PDF document text
    • http://xn--90aoaidn.xn--p1ai/ckfinder/userfiles/files/vidatamoketel.pdfIn PDF document text
    • http://em-mould.com/ckfinder/userfiles/files/76065820094.pdfIn PDF document text
    • http://modra-skola.cz/userfiles/file/figidifaroruvusokasava.pdfIn PDF document text
    • http://mama.plovdivweek.com/js/ckfinder/userfiles/files/benasigokigum.pdfIn PDF document text
    • http://www.libroparlatolions.it/backoffice/ckfinder/userfiles/files/vegalabinapexutozaf.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_off0000af3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF3F 10352 bytes
SHA-256: e1bd7f8ab81e060a0d9d38d1c62529f6eaa4103a70ef409c865b861795c76d04
font_01_sfnt_off0000c6ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6AE 14972 bytes
SHA-256: eb0ab2f32299e44c1adbed301efef5c08e8d55efe35ab73a3b15a3594b95237c
font_02_sfnt_off0000ec7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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