Malicious PDF — malware analysis report

Static analysis result for SHA-256 952755ade02c1717…

MALICIOUS

PDF

69.3 KB Created: 2021-09-25 22:56:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ba738cc84f487c4d5293e52a1eb24efe SHA-1: 7d27cea9e00859bac8ccf3fefbd3b3d6cd25a685 SHA-256: 952755ade02c1717f6f7a9c5cf0abc249016e9c215f1c031c08cdb40e566280c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external links, many of which point to domains associated with link farms or compromised content management systems. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a malicious document designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • 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 https://nomylo.ru/uplcv?utm_term=good+android+games+to+play PDF link annotation
    • http://hyunsin.net/userfiles/file/nojejigovezobimukugi.pdfIn PDF document text
    • http://acmemask.com/upfiles/editor/files/29127896107.pdfIn PDF document text
    • http://briztravel.com/upload/files/85051493376.pdfIn PDF document text
    • http://peterpan1996.it/userfiles/files/61143912359.pdfIn PDF document text
    • http://gfzgt.ch/upload/file/64504260600.pdfIn PDF document text
    • http://oppedisanorobertosrl.com/userfiles/files/puraxixavojejonafesowido.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132d2e9c1cfc---22520657845.pdfIn PDF document text
    • http://peoplefineart.com/assets/202109/files/20210902214459743532.pdfIn PDF document text
    • http://euskararenginkana.eus/files/galeria/files/wegap.pdfIn PDF document text
    • http://lonerangerfanclub.com/ckfinder/userfiles/files/xofumuganudavimajogan.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/a2d63d40a52ee8e5f8fa68241259a8cc/lupodajarakafuvogu.pdfIn PDF document text
    • https://bursac.net/userfiles/file/50239557182.pdfIn PDF document text
    • http://studioguatta.it/userfiles/files/15191404321.pdfIn PDF document text
    • http://stellamaris.cz/userfiles/19365797361.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/08044dc1940a2364c91180b462193c3a/31980263474.pdfIn PDF document text
    • http://acmemask.com/upfiles/editor/files/gunowu.pdfIn PDF document text
    • http://ride.hu/images/uploads/files/6019126629.pdfIn PDF document text
    • http://arcos-eff.it/userfiles/files/15895793924.pdfIn PDF document text
    • http://louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/robezubixutuk.pdfIn PDF document text
    • http://sanmorales.es/userfiles/files/zaxarijunapimar.pdfIn PDF document text
    • http://cartopack.be/Images/file/posuxowop.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613aa08e1ab35---beporokukivi.pdfIn PDF document text
    • http://sicilalluminio.it/userfiles/files/lopiwaxuz.pdfIn PDF document text
    • http://malbreil.com/userfiles/file/60971944795.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_off0000afb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFB0 10888 bytes
SHA-256: 1fb7e4f2f4c476c82afa1b2628f9c21bdd99ef9a278dcc631b94c3b1242e18a2
font_01_sfnt_off0000c8ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e0bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BF 15268 bytes
SHA-256: 73742cc8db21dc8400ca1d8786e0cf5ec2ef94e068e73204c0f7790066b3bc2d

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