Malicious PDF — malware analysis report

Static analysis result for SHA-256 f24569a129fdda23…

MALICIOUS

PDF

82.1 KB Created: 2021-09-03 13:17:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5f58316ee14c6fc94d1ed771a0e911a1 SHA-1: 2e78630f9b7d3a504fed28209e5b1377f0235c59 SHA-256: f24569a129fdda237bb4d62fbc5f8b643a63f7f0bbe9d481be83282ab002eed9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high volume of links designed to appear legitimate but lead to potentially malicious content. The embedded JavaScript likely facilitates the redirection to these malicious sites, contributing to a phishing or malware distribution attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://archism.ru/uplcv?utm_term=tb+pathology+pdf PDF link annotation
    • http://hidramaco.com/files/files/38551087133.pdfIn PDF document text
    • https://komunalno-vrgorac.hr/files/remazetogerugojedul.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/0ffc108a570858bd93b57c99a421b161/63197210824.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/4c8cf399d119460dbed69492c2e3507b/34876648574.pdfIn PDF document text
    • http://dansensvenner.dk/imagesfile///pifinitaberitarajiritede.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/6c8bdf045111da98d28d462feea6d010/jefibofowipogafiluma.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/70d1add5d5f38041146aabf6a04dffc0/19484869717.pdfIn PDF document text
    • http://monktonlionsclubkidscamp.com/clients/9/99/99b8b5517e5fb663501b7ee5137ebf55/File/zosasoz.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/49edd08a1f9a114b9b624656b958099a/35519001747.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/48559671580.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5b62c65a4f---94373199350.pdfIn PDF document text
    • https://mangonebike.com/uploads/file/jegedudujotavimamepag.pdfIn PDF document text
    • http://regalmotors-jp.com/js/upload/files/nibosamapilufapudukevofav.pdfIn PDF document text
    • https://daquin-ferriere.fr/userfiles/file/vuzilefuxirov.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/a38e90b2cb2cd42cdb4144ddb638bed7/womovawawomidepuvej.pdfIn PDF document text
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/4830368b8fd359f2d4600106807dfef2/30795161828.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/xugigarinegozigigi.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f51ab2e012---28715923010.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160cd3b0910ac5---66296531101.pdfIn PDF document text
    • http://ridgefieldpark1967.com/clients/3/39/39eebdc8797e30ee23d4fd57d071fd44/File/43716661194.pdfIn PDF document text
    • http://debeight.net/UserFiles/File/88198492758.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_off0000dee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F5 17352 bytes
SHA-256: 0036876127c519c3bedea604c1a0f6995c86efbb9442f34d27d9635320b9c9f1
font_02_sfnt_off000123c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123C2 10400 bytes
SHA-256: d6e47914971bebee092e774dc7da17020bae606cef2f9ddc85f04b7c5a90567c

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