Malicious PDF — malware analysis report

Static analysis result for SHA-256 d314ad03cd1adf8c…

MALICIOUS

PDF

71.2 KB Created: 2021-09-27 20:01:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0db03a5b7f220001d26d0fc129eb55d4 SHA-1: cc991c948b56950f5d824a84f5f32062f951a4b3 SHA-256: d314ad03cd1adf8cc58897d8898008444f500c31583fe9e8618ae4c8107af654
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded JavaScript indicates potential for further malicious actions beyond simple redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://aprenda-atdi.com/uploads/files/94767855500.pdf In PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1615199e21b900---61624639803.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/161393d6a892b6---76527471611.pdfIn PDF document text
    • http://xy-interior.com/uploads/files/202109130849147561.pdfIn PDF document text
    • https://adamant54.ru/userfiles/files/33836662404.pdfIn PDF document text
    • https://ville-saintleonard.fr/pdf/14702370400.pdfIn PDF document text
    • http://streetnn.ru/data/upload/ck/files/9047636829.pdfIn PDF document text
    • http://grandwatergatehotel.com/upfile_hotel/files/gezisetugupujituje.pdfIn PDF document text
    • https://pharma-tools.pl/galeria/file/13721005592.pdfIn PDF document text
    • http://cleanyachts.it/writable/public/userfiles/file/7589116504.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/6c90db02dc9a8413ef89cebe87331506/bawapepemu.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/savivotaponisogek.pdfIn PDF document text
    • http://nilesk.com/userfiles/file/56211991134.pdfIn PDF document text
    • https://nevisnews.com/userfiles/9252339822.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/tvqtmbviffkecurji4sr32hi1o/pebodiguf.pdfIn PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/kesitagokogefudikakop.pdfIn PDF document text
    • http://rybarict.cz/webpagebuilder/ckfinder/userfiles/files/gojutisukovidibonupe.pdfIn PDF document text
    • http://walosports.cl/userfiles/file/tekuniwofon.pdfIn PDF document text
    • https://macauroommate.com/ckfinder/userfiles/files/pijovonetuwogoduzeme.pdfIn PDF document text
    • http://studioriboldi.eu/userfiles/files/daxaj.pdfIn PDF document text
    • http://onlytech-tunisie.com/userfiles/file/77973710790.pdfIn PDF document text
    • http://acm-medicali.it/userfiles/files/zabizin.pdfIn PDF document text
    • http://tochalco.com/uploads/files/wagulujevomitomeme.pdfIn PDF document text
    • http://abwplazaview.com/uploads/files/rawivufezite.pdfIn PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/10762844278.pdfIn PDF document text
    • https://olivermilk.vn/tctt/sites/aaa/file/74560656339.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=diff+using+notepad%2B%2BPDF 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_off0000b4e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4E3 16168 bytes
SHA-256: 49300d312db10a95e2596a7bb7e8bb57d2f3aeaaee754c9107202fbc502651a9
font_01_sfnt_off0000dea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA9 10628 bytes
SHA-256: 994d293b0540dcf44c948a97bab1c9d263c01337e7b9c267f1ef8f5f181b34f3
font_02_sfnt_off0000f6e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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