Malicious PDF — malware analysis report

Static analysis result for SHA-256 014f24a6d1be25e7…

MALICIOUS

PDF

83.5 KB Created: 2021-09-17 06:28:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 92ae8e9d4a71ab6061c482b4ae8c6e9b SHA-1: 6c81bc3362146e56167ad92247d06e4d6bfd5f96 SHA-256: 014f24a6d1be25e73b363d8c26f4242e342809305d307ddae87dc11b3359e5d8
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 disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://czechdidgeridoo.com/admin/upload/file/mafowufogogisubolat.pdf In PDF document text
    • http://disonde.com/filespath/files/20210906044938.pdfIn PDF document text
    • http://xn--h1agcmh.com/ckfinder/userfiles/files/73477195863.pdfIn PDF document text
    • http://prospekt-rostov.ru/ckfinder/userfiles/files/84448664443.pdfIn PDF document text
    • http://klhl.com/userfiles/file/govozolub.pdfIn PDF document text
    • http://brixtontaxi.com/survey/userfiles/files/32180089854.pdfIn PDF document text
    • http://uticachemical.com/files/upload/files/88892340956.pdfIn PDF document text
    • http://www.tm-africa.com/beta/public/uploads/cms_filescms_files/71142322399.pdfIn PDF document text
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/polasegawatatijinid.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16130f5aa543dc---68995998974.pdfIn PDF document text
    • https://sreekanakananda.com/ckfinder/userfiles/files/57331544862.pdfIn PDF document text
    • http://the100voicesofgospel.ch/fichiers/newsletter/file/tanodezejilam.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/mevavoz.pdfIn PDF document text
    • http://laboratoriodiprogettazione-ve.it/userfiles/files/xigewodekakarigufa.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/xididekizejemadudexu.pdfIn PDF document text
    • http://teewer.mn/ckfinder/userfiles/files/lesopejalivarel.pdfIn PDF document text
    • https://bi-kiesabbau.de/cmsimple/images/file/fifovizi.pdfIn PDF document text
    • http://melly-incendie.fr/img_db/jaxiloxupisuwupofonazaduv.pdfIn PDF document text
    • https://eurochen.com/UpFiles/WebEditorFiles/file/gasusokera.pdfIn PDF document text
    • https://thaiahpa.com/flash/files/96223576870.pdfIn PDF document text
    • http://atletika-pardubice.cz/files/file/10554646101.pdfIn PDF document text
    • http://awkontrakt.pl/ckfinder/userfiles/files/renimexox.pdfIn PDF document text
    • http://honghuibio.com/d/files/64208107824.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/780607b61faa5452193411c4b887a312/97823189586.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=winning+eleven+2012+android+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_off0000e107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE107 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f91e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF91E 10764 bytes
SHA-256: fa07a0cd67f40a56d3d44de28d5ec7cbc5e2317dc267f9fcedd7d8b6f3d0ecb7
font_02_sfnt_off000111ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111BA 17848 bytes
SHA-256: eab96d6c62332792749a21892dda26984cd2c0f59befaf95f512ede56484139d