Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2b093802aa7c58c…

MALICIOUS

PDF

85.8 KB Created: 2021-09-15 19:11:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e0410f1929fc94d4ccd131969f1d495f SHA-1: c42270bf41afd70469ff92cedeafa9f1cf730355 SHA-256: e2b093802aa7c58ccd6a65a53fb7d5c27edeb62dd27727338cdf8fb41e6494bc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and multiple external URIs, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. ClamAV detection and ML classification strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript (T1059.007) suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://bsinteriordesigner.com/userfiles/files/71341281738.pdf In PDF document text
    • https://helicopterleasingservices.com/userfiles/files/pevotasanorub.pdfIn PDF document text
    • https://bompentax.com/quangbasanpham/app/webroot/upload/image/files/22056935239.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/matesolitefasibetadu.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16132e215434c7---92520476295.pdfIn PDF document text
    • https://carcarnet.com/home/sandbox/domains/hkdance.tritek.hk/public_html/ckfinder/userfiles/files/48921835218.pdfIn PDF document text
    • http://keystoparadise.com/userfiles/files/79857752635.pdfIn PDF document text
    • http://kolbiko.com/images/uploads/file/ronodizomewuware.pdfIn PDF document text
    • http://ekouklid.eu/UserFiles/file/11536951432.pdfIn PDF document text
    • https://giraffeng.net/infodaily/gen-ckfinder/userfiles/files/fuvureg.pdfIn PDF document text
    • https://bepcongnghiepphuchung.vn/userfiles/file/ruwerafanoxaxidesenuv.pdfIn PDF document text
    • http://wedooverseas.com/userfiles/file/773719760.pdfIn PDF document text
    • http://kozhencherrymtc.org/userfiles/file/narivanabibix.pdfIn PDF document text
    • http://carneiro-sa.pnh.pt/js/ckfinder/userfiles/files/bamazanusukavo.pdfIn PDF document text
    • http://futuralagoparking.eu/userfiles/files/ponik.pdfIn PDF document text
    • http://armiikrajowej36.pl/public/upload/ckfinder/userfiles/files/23269599255.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614165cbaa493---xezunozovejorijumute.pdfIn PDF document text
    • https://daquin-ferriere.fr/userfiles/file/79566810061.pdfIn PDF document text
    • https://amoslodge10.org/ckfinder/userfiles/files/dokenivibobufijosaguvos.pdfIn PDF document text
    • https://pepinieramontana.ro/ckfinder/userfiles/files/pigivufemaxijuxo.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/tutarobefoxinadizinunuk.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ee09502ac9---mometugevifafutim.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139bcfc4534f---68680096785.pdfIn PDF document text
    • https://marblo.marblobaths.ph/app/webroot/img/files/9773423331.pdfIn PDF document text
    • http://www.civilhospitalpalampur.in/img/uploads/files/sogazetasosaginiverunede.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+transfer+photos+from+android+to+mac+with+usbPDF 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_off0000e620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE620 11156 bytes
SHA-256: e2274fd2c99250cd65aff2268cf305e47fcb69f5270d9b8ffb1419b5e397c7fe
font_01_sfnt_off0000ffcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCB 19180 bytes
SHA-256: 963fec2845117e9ff831cde388601583ebcdb8c668b7bab7cc1bfbc1b594c785
font_02_sfnt_off0001316c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1316C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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