Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeab64513c73a0db…

MALICIOUS

PDF

80.5 KB Created: 2021-09-18 06:05:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: aa76aae2a0c83db6f919a1cfceccc3d6 SHA-1: 2097505b35ee324c16f4d069c16941e4d9e1b410 SHA-256: aeab64513c73a0db3b4525bd46a72e61acd518c3b5e63253f550a35fc8470c69
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a phishing or redirection attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://wastran.ru/uplcv?utm_term=score+hero+mod+app PDF link annotation
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/37087309890ccf6e5bec28efa8e560ac/83544873853.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea6956cead---kukelevuragazalanul.pdfIn PDF document text
    • http://generoussecurity.com/uploads/27281236084.pdfIn PDF document text
    • https://xpress2.eu/ckfinder/userfiles/files/jolebexo.pdfIn PDF document text
    • http://hangquangauto.com/files/mamenapale.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136203958bd7---wigimilalavaxeke.pdfIn PDF document text
    • http://fratellibeninca.com/images/file/59611972074.pdfIn PDF document text
    • http://hykylalumni.org/userfiles/logoragisevizinajilago.pdfIn PDF document text
    • http://dioblina.eu/userfiles/file/zovamavelonulakinarobanog.pdfIn PDF document text
    • https://akvaguru.hu/user/file/rofutefewebiwiliseninovu.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130127e4a84f---papaxajupufalaz.pdfIn PDF document text
    • http://phayaotechno.com/UserFiles/File/tenazalewelonib.pdfIn PDF document text
    • http://boothbayharborshipyard.com/userfiles/file/57978758744.pdfIn PDF document text
    • https://tagoproperties.com/ckfinder/userfiles/files/gofudagoxewemurobewuz.pdfIn PDF document text
    • http://popnmusic.fr/userfiles/file/29512629784.pdfIn PDF document text
    • https://www.shamshabaddiocese.org/files/js/ckfinder/userfiles/files/72349449799.pdfIn PDF document text
    • http://daechienglishpark.com/ckfinder/userfiles/files/debagifumafolisunona.pdfIn PDF document text
    • http://myxroad.net/upload/userfiles/file///68971964971.pdfIn PDF document text
    • https://ispartaorganizasyon.com/ckfinder/upload/files/25975761020.pdfIn PDF document text
    • http://chamdure.com/DATA/files/xituj.pdfIn PDF document text
    • http://crmrealty360degree.in/ci/userfiles/files/jesofilefamipa.pdfIn PDF document text
    • http://dongsimkindergarten.com/upload/files/80064921185.pdfIn PDF document text
    • https://efsanepin.com/calisma2/files/uploads/govaxajirobojenebaxivevoz.pdfIn PDF document text
    • http://rotarytattoomachine.co/project-new/christianbook/upload_images/file/8617932246.pdfIn PDF document text
    • http://laihoawedding.com/app/webroot/upload/files/mamen.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_off0000d7af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC6 10348 bytes
SHA-256: 5cec1149048d6ea240432cccc6d7ce30a8d04e8d465ff06fe00cee05bef4cf44
font_02_sfnt_off0001071c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071C 17680 bytes
SHA-256: a22a3a4196565af0e3129034dbc21de7dc66f59844c70b3ab95d9558db00e1f2

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