Malicious PDF — malware analysis report

Static analysis result for SHA-256 eabed51779135d4e…

MALICIOUS

PDF

73.9 KB Created: 2021-09-24 00:51:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0b165aaf052150fe662466650e628c36 SHA-1: dd72054adbedf3b8b5c056398db3c436e38e31c6 SHA-256: eabed51779135d4e1006eb4daf8143ddbd4932d4d33f3f2efdf757e002d3ebb6
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, indicating it is designed to redirect users. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggests a malicious intent to host numerous links on disposable domains. ClamAV and ML classifiers also flagged this PDF as malicious, supporting its classification as a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jucal.es/images/file/15468287464.pdf In PDF document text
    • http://acpiindia.com/userfiles/file/46236170760.pdfIn PDF document text
    • http://trevelci.ru/ckfinder/userfiles/files/79330398049.pdfIn PDF document text
    • https://clickbox.ro/images/file/18614992888.pdfIn PDF document text
    • http://cctechlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/21072483546.pdfIn PDF document text
    • http://lecostationery.com/files/file/17963467978.pdfIn PDF document text
    • https://atputasbaze.lv/images/userfiles/files/88639328166.pdfIn PDF document text
    • http://www.thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/xogaxifalawisateve.pdfIn PDF document text
    • http://sushiosushi.com/uploads/files/lozut.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///48496619717.pdfIn PDF document text
    • http://thietbibepnhahang.net/media/files/juxazemigiladin.pdfIn PDF document text
    • http://www.yankey.com.tw/demo/public/editor/ckfinder/upload/user_upload/files/wifog.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148fd299d0a4---38696114391.pdfIn PDF document text
    • http://toszegisuli.hu/userfiles/file/lavumifexom.pdfIn PDF document text
    • http://szpitalstrzelin.pl/userfiles/files/vipumemeditupan.pdfIn PDF document text
    • http://scea.edu.mn/ckfinder/userfiles/files/nezifaxis.pdfIn PDF document text
    • https://globalcareerclub.com/FCKeditor/userfiles/file/rigefixige.pdfIn PDF document text
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/70897620672.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/66963113673.pdfIn PDF document text
    • http://studioagronomoserragiotto.eu/userfiles/files/rumalerosadezamo.pdfIn PDF document text
    • http://polkovnik.su/upload/file/27924252574.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/jqn3ti9u8pb8aq8bd2pohatou0/somovojejivawoxinula.pdfIn PDF document text
    • http://greenvisioninternational.gm/userfiles/file/4957152923.pdfIn PDF document text
    • http://xz-brand.com/ckfinder/userfiles/files/vaziwawot.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/xokifepaderegenanirej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=have+got+exercises+pdf+elementaryPDF 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_off0000bd67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD67 16316 bytes
SHA-256: 0cf6b2254d9bdfd05e263854d700015ff75cfcbd526ab436a4a03ab2c4c3734f
font_01_sfnt_off0000e730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE730 11236 bytes
SHA-256: 9707efb2fca66acad25dd81c5e0d965425de0a7d1352adbc726dd5c468efae1d
font_02_sfnt_off00010152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10152 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1