Malicious PDF — malware analysis report

Static analysis result for SHA-256 6997e435a63adc07…

MALICIOUS

PDF

74.2 KB Created: 2021-09-12 12:04:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b7dd52509f1b0aee7cb75001a5e97f13 SHA-1: 2348707fbd413ddf794518cecd47352878cb215a SHA-256: 6997e435a63adc072ce0d15e7426d910f02ca853d8bf93c46032e42ff78f8a0c
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple links pointing to compromised websites, some of which host further PDF files. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to download a password-protected archive, a common tactic to bypass gateway security. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://garglob.ru/uplcv?utm_term=best+place+to+stream+new+movies PDF link annotation
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/161345c4991880---87573203921.pdfIn PDF document text
    • http://brenna-ski.pl/userfiles/file/7554891713.pdfIn PDF document text
    • https://emenu.hu/editor_up/99090918011.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/0h581khjauhimkpsjrt01e6f60/13569220093.pdfIn PDF document text
    • http://prvugkh.ru/uploads/files/59752804855.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fc6aa1f8619bd56c0ccd4dd0e567bb11/64162868640.pdfIn PDF document text
    • https://loyallcanada.net/editor_files/file/69246372405.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/kimezoxoludifilitixivetu.pdfIn PDF document text
    • https://rdw-wolf.de/backend/ckfinder/userfiles/files/vebonogofaduwovaxedidoj.pdfIn PDF document text
    • http://chemonova.com/FCKeditor/file/64315356803.pdfIn PDF document text
    • https://coopinproject.eu/ckfinder/userfiles/files/94719632928.pdfIn PDF document text
    • http://sichera.eu/userfiles/files/48374455742.pdfIn PDF document text
    • http://garmaclima.com/uploads/ckfinder/files/14913489290.pdfIn PDF document text
    • http://architectureanddesign.it/userfiles/files/wewirunigen.pdfIn PDF document text
    • http://shiinamotors.com/js/upload/files/pikabap.pdfIn PDF document text
    • http://svadbavmoskve.com/content/xuploadimages/file/mutilurorazeg.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b2eb462049---jabamovemezopirapipago.pdfIn PDF document text
    • http://raffaelecavazzoni.com/userfiles/files/86217277800.pdfIn PDF document text
    • http://sprinter-lab.ru/content/File/17741012795.pdfIn PDF document text
    • http://transporteslaplata.com/imagenes_web/file/revumigu.pdfIn PDF document text
    • http://fgsconsulta.com.br/ckfinder/uploads/userfiles/files/pifabe.pdfIn PDF document text
    • http://revize-elektro.info/UserFiles/File/16957442779.pdfIn PDF document text
    • http://julianina.dk/upload/file/48261301370.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_off0000bea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d6b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B6 16972 bytes
SHA-256: 729f5d9be0d1039e1ae2cc1a28cc1263c200fbed9813120fc1fb2a8815fdcc72
font_02_sfnt_off0001029a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029A 10740 bytes
SHA-256: 2d953fbe73ea0c5c97f9de6c23a8bf5a67c9fb7b769220f12292dcd5e6930cb2

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