Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ebefea89761dbb6…

MALICIOUS

PDF

72.4 KB Created: 2021-09-30 22:36:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b8201ab006161c015bb9e2ffe29ffc90 SHA-1: 92187d42eff0654316b8704a74509cee254edc86 SHA-256: 8ebefea89761dbb6089dc6a4a14c51ffed75fdb11ed343e9ddea6aca7ba5b0f5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous links to external websites, some hosted on compromised or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to exploiting vulnerabilities or delivering a second-stage payload via the embedded JavaScript and external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://expertsystemgroup.com/file_media/file_image/file/48218340639.pdf In PDF document text
    • http://dieukhactransam.com/uploads/files/kiwudizabizaki.pdfIn PDF document text
    • http://coimbrasoftware.hu/images/uploads/files/7555787894.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614618b7e066d---tafov.pdfIn PDF document text
    • https://sanidom.pl/img/file/pegugovuvopuperiteb.pdfIn PDF document text
    • https://stalbeckers.nl/userfiles/image/file/5853865279.pdfIn PDF document text
    • http://klinok-saintp.ru/files/47898896393.pdfIn PDF document text
    • http://maschimaurizio.it/userfiles/files/63585066090.pdfIn PDF document text
    • https://melz-feu.ru/upload/leduzupitogume.pdfIn PDF document text
    • http://thephinhmienbac.com/upload/files/zuwodum.pdfIn PDF document text
    • https://idroilektriki.gr/files/file/lilufatabit.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/file/mimijewi.pdfIn PDF document text
    • http://tatagz.com/uploadfile/files/woparawotove.pdfIn PDF document text
    • http://sowiik.pl/userfiles/file/busaragoboga.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/161328a72dab70---42467155672.pdfIn PDF document text
    • https://bankkartya.hu/js/ckfinder/userfiles/files/96650967122.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ea081117af---43472515241.pdfIn PDF document text
    • http://mondoacquapiscine.com/userfiles/files/volumekoferesejituja.pdfIn PDF document text
    • http://www.niceresidence.net/image/upload/File/59745660469.pdfIn PDF document text
    • http://aptwash.com/userData/ebizro_board/file/46745763315.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614bdc3d8afd3---zifajofo.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/20920599810.pdfIn PDF document text
    • http://orderbestwings.com/uploads/files/pexudawimozil.pdfIn PDF document text
    • http://groupementpecheduloir.com/ckfinder/userfiles/files/purexawukelijujifato.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=sales+order+processing+system+pptPDF 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_off0000b538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB538 17092 bytes
SHA-256: efa411a036be2fcc442a22bd4b5932998f92648b5f4d61db8efcf1ca02e45db4
font_01_sfnt_off0000e07c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07C 11048 bytes
SHA-256: 002fbf667c7be8fd8a45c26ac5fe53278b9fb11742195f06ba8bced759395408
font_02_sfnt_off0000f9f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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