Malicious PDF — malware analysis report

Static analysis result for SHA-256 db5b34e392fb1e22…

MALICIOUS

PDF

69.9 KB Created: 2021-09-30 10:14:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 80830e64c3cc2574775ef7ce90ac4e5a SHA-1: 5bdc484cad5df91d16024271f9ea799e316a5f5c SHA-256: db5b34e392fb1e226db0c9d9a056499a5d461990cfcecbac2ddce5befda1f7e1
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users. The presence of numerous external links, many pointing to unknown PDF files, further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://dreambeauty.kr/upload/fckeditor/file/raxozomuminebebanodu.pdf In PDF document text
    • http://savitapiti.org/ckfinder/userfiles/files/nulijuwozorededavojun.pdfIn PDF document text
    • https://campermagazine.tv/public/file/xisuxopesariludovije.pdfIn PDF document text
    • http://fk-fudosan.1nino3.com/app/webroot/img/userfiles/files/64003343417.pdfIn PDF document text
    • http://15449010.com/FileData/ckfinder/files/20210921_050F53E616404BBA.pdfIn PDF document text
    • https://rabudiagnostic.com/userfiles/files/mojogalazevimevezetafa.pdfIn PDF document text
    • http://dsacare.com/admin/uploads/file/16084568441.pdfIn PDF document text
    • https://labelmarket.pl/data/file/41355704657.pdfIn PDF document text
    • https://zenit-npk.ru/files/file/46296242225.pdfIn PDF document text
    • http://harposwebdesign.nl/app/webroot/files/userfiles/files/98955285011.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/45713758526.pdfIn PDF document text
    • http://studiotecnicodambra.eu/userfiles/files/69954579663.pdfIn PDF document text
    • http://vectorma.ru/uploads/assets/file/tizexalawiduz.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613e8c7856bf8---kesodafekewog.pdfIn PDF document text
    • http://www.palmettoexpresslanes.com/system/js/back/ckfinder/userfiles/files/58527951714.pdfIn PDF document text
    • http://gddfboiler.com/uploads/files/33393134756.pdfIn PDF document text
    • http://duancanhotot.com/upload/files/41979619556.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/49459914595.pdfIn PDF document text
    • http://rakkhunnursinghome.com/user_img/files/patuvajiferelikeditepis.pdfIn PDF document text
    • https://www.la-melodie-des-saveurs.fr/ckfinder/userfiles/files/91548524070.pdfIn PDF document text
    • https://giga-tronics.com/userfiles/files/6910272932.pdfIn PDF document text
    • http://location-appartement-venise.com/italie_documents/files/palaj.pdfIn PDF document text
    • http://lgassociates.in/uploads/65831715877.pdfIn PDF document text
    • https://chorland-dining.com/webroot/editor-uploads/files/44549490726.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=real+football+2019+game+downloadPDF 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_off0000af7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF7D 16000 bytes
SHA-256: 5a01fd56c5e924279747ca5a8234b344704f299fc902e1bf1ea6c51f6d239823
font_01_sfnt_off0000d88e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD88E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f0a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A5 11068 bytes
SHA-256: dafa50493e4d23469493d24b232996ebe9d7a4ae40d732d9f7f5204afb65a6e6