Malicious PDF — malware analysis report

Static analysis result for SHA-256 80103ae7aadf2f8e…

MALICIOUS

PDF

88.8 KB Created: 2021-09-01 12:14:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8c464a740f2728459b69bc217cabefd3 SHA-1: ff63eaa5f3a6be3a376815e47446f69ffe67ec2d SHA-256: 80103ae7aadf2f8eae98abf67767fc2ce007d3653addf1226e17d0da75ff0521
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript and a large number of external URIs, many of which point to compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malicious content. The embedded JavaScript is likely used to facilitate the redirection or exploit PDF vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://pinpointfeedtech.com/ckfinder/userfiles/files/xiwojojigufosaxuralapot.pdf In PDF document text
    • https://bahispesinde.com/gnc/veri/_files/kifafinoxulupivosepafob.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/161082e98a197f---xesogugawivodelimu.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085972421854---26725723200.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/6a8o389blj6d0spnemfip426q5/sufunitupejuverokuwid.pdfIn PDF document text
    • http://parejalecaros.com/adjunto/upload/fck/files/duvesamemonarifo.pdfIn PDF document text
    • http://geoplan.su/userfiles/file/nuxujikafes.pdfIn PDF document text
    • http://synthecinter.com/userfiles/files/tesanije.pdfIn PDF document text
    • http://internationalnetworksolutions.net/files/In PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1607ebb114a895---95326619646.pdfIn PDF document text
    • http://murasakijr.com/uploads/files/93457329418.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/87300048598.pdfIn PDF document text
    • http://radio6deenero.com/uploaded/files/wiresirega.pdfIn PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/rabozol.pdfIn PDF document text
    • https://agroadvanced.com/app/webroot/newsletters/editor/files/1947857563.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/leribi.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/79473541901.pdfIn PDF document text
    • http://csc-021.com/userfiles/file/20210716003021_ngwxxk.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609558504a083---54366922830.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757e7b1bc20---kolidukevukalis.pdfIn PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/zevusalanepokonus.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b8fa67271f---62551168484.pdfIn PDF document text
    • http://anvlaw.com/userfiles/file/30923171890.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/adcc3d730a464710896b213a18eb4fcc/45780477176.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=best+personality+testPDF 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_off0000f472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF472 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010c84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C84 19244 bytes
SHA-256: cd03b071c52910dc4a609190f64f06ddd372988dee0098115f724f06f835fbc8
font_02_sfnt_off00013dd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DD6 10412 bytes
SHA-256: 624da59edd9ea00ecb31c886b42b329d307d9b9e82922c8b5d78deeadef6f7ae

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