Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea40076675ab8900…

MALICIOUS

PDF

76.6 KB Created: 2021-09-18 05:55:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 626573ee1387f5653d0536932f07f95f SHA-1: 14dd50ae24c1dfd64a757f4af2dc37a42098403b SHA-256: ea40076675ab89007c6ef37a3ba308b7d47061305e3e3125c972270ef93d92fc
134 Risk Score

Malware Insights

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

This PDF contains embedded JavaScript and numerous external URIs, many hosted on disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to exploit vulnerabilities or trick users into downloading further malicious content. The presence of embedded JavaScript points to its use in executing malicious actions within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zangerlelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/98593907205.pdf In PDF document text
    • https://lifesmart.ro/ckfinder/userfiles/files/vivosasadopojujukit.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/161427019abf67---metuw.pdfIn PDF document text
    • http://hoteldanang.com/uploads/images/files/kapasavunomizobovijupipax.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/15151591845.pdfIn PDF document text
    • http://thaicockstar.com/ckfinder/userfiles/files/51867763264.pdfIn PDF document text
    • http://toyotaprius-custom.com/js/upload/files/95944105869.pdfIn PDF document text
    • http://como.gattinonimondodivacanze.it/themes/userfiles/files/64340125122.pdfIn PDF document text
    • http://cokhivietuc.webthoidai.com/img-vietuc/files/rivapoxapefofetor.pdfIn PDF document text
    • http://a-mega.ua/images/uploads/file/89988199576.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/ravoxukomajuxiwufirimag.pdfIn PDF document text
    • http://yousefmaktabi.com/ckfinder/userfiles/files/49060593854.pdfIn PDF document text
    • https://4of100churchstreet.com/assets/media/files/newuguradamelafekikevagi.pdfIn PDF document text
    • http://lse.hu/userfiles/file/teputane.pdfIn PDF document text
    • https://permargi.com/files/galeria/files/junajef.pdfIn PDF document text
    • https://u15.ch/ckfinder/userfiles/files/norek.pdfIn PDF document text
    • https://dragonexpressml.com/userfiles/files/rafivedobiva.pdfIn PDF document text
    • https://verticala.ro/images/userfiles/sexevirebifadoron.pdfIn PDF document text
    • http://855solution.com/htdocs/cljr/data/files/mokugosomogap.pdfIn PDF document text
    • http://gzafjc.com/uploadfile/files/zoxezexifukexena.pdfIn PDF document text
    • https://auto826.com/uploads/files/sepokoravibagurix.pdfIn PDF document text
    • http://vdadanang.vn/app/webroot/assets/files/40213549047.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/9b10962fcf36dad22389404ffe716874/zomigebikeso.pdfIn PDF document text
    • https://hoanghaie.com/Images_upload/files/11029478830.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=assassin%27s+creed+syndicate+download+for+androidPDF 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_off0000c6dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6DD 17448 bytes
SHA-256: 5a4262584df8224059fb5e382cf95fa7a65c2ba89a21eae8fa859921d594cdad
font_01_sfnt_off0000f334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF334 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010b4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4B 10684 bytes
SHA-256: e7b83685759e1823440ca6a477a9cd4c8c54c93270ac164d6c25b34932ffd4eb