Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f0d2a95bc561aef…

MALICIOUS

PDF

84.2 KB Created: 2021-09-12 18:15:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: 8025b39b4aeed9ccc5cc935019d815eb SHA-1: 14654c1718d7ac32fbb4d963ba7e1bcfd25f84bb SHA-256: 9f0d2a95bc561aefc227776705f9fd7cd8f0c01453704ebb8ae966c622e83b60
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on suspicious domains. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a large number of links pointing to disposable hosting, suggesting a link farm designed to distribute malicious content or phish for credentials. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://algarestofos.pnh.pt/js/ckfinder/userfiles/files/xezibiwifurikala.pdf In PDF document text
    • http://ez-surveying.com/htdocs/cljr/data/files/fezijusutezad.pdfIn PDF document text
    • https://bompentax.com/quangbasanpham/app/webroot/upload/image/files/vamiribesagevo.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/poritaloregaze.pdfIn PDF document text
    • https://hanurichurch.org/ckfinder/userfiles/files/52946964907.pdfIn PDF document text
    • http://studiovalentini.eu/userfiles/files/37549720690.pdfIn PDF document text
    • https://mar3ol.com/Files/files/23121205474.pdfIn PDF document text
    • http://www.wcd.com.tw/ezadmin/ckfinder/userfiles/files/zadafitasebom.pdfIn PDF document text
    • https://hilanguage-com-tw.triangle-design.com/files/59008726541.pdfIn PDF document text
    • http://ccsctda.com/ckfinder/userfiles/files/20210901_083602.pdfIn PDF document text
    • http://domadoma.cz/userfiles/file/mivufupelonok.pdfIn PDF document text
    • https://daks-96.com/f/uploads/files/difagonulenava.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/posuvebeminer.pdfIn PDF document text
    • http://eternalcycle.com/FCKFiles/file/53251800364.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613078842724e---xezorizixujawunegafujiteb.pdfIn PDF document text
    • http://cctechlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/38956753341.pdfIn PDF document text
    • http://sun-green.de/ckfinder/userfiles/files/ginaxawag.pdfIn PDF document text
    • http://355353.ru/userfiles/file/nujeduwakivafaxunazo.pdfIn PDF document text
    • http://portaldo.eu/contenuti/upload/file/banenalixerufita.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613acee8b462c---vefafamezuw.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/28019785036.pdfIn PDF document text
    • https://promobryansk.ru/userfiles/files/kederagajenorilin.pdfIn PDF document text
    • https://irantruck.ir/data/file/67554347426.pdfIn PDF document text
    • http://vmkmsz.hu/userfiles/file/vizuloribalumodaguritawi.pdfIn PDF document text
    • http://theorientgarden.iorderfoods.com/uploads/files/80781126149.pdfIn PDF document text
    • https://habibitours.net/ckfinder/userfiles/files/94789073980.pdfIn PDF document text
    • https://qeyeoptical.com/ckeditor/ckfinder/userfiles/files/56374847006.pdfIn PDF document text
    • https://lotusmarinevn.com/upload/files/22587641135.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=edit+pdf+text+in+photoshopPDF 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_off0000e34f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB61 18560 bytes
SHA-256: 13bab2fabe26b779febcb48f52ec2699a8fb0f9658fccab88cfdc10af64ed3ad
font_02_sfnt_off00012b07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B07 10372 bytes
SHA-256: d92f66b016d8af5d2a98fb1ed9ef9ddfa7ee7f8c9cfa75661c8061f74a7879ce