Malicious PDF — malware analysis report

Static analysis result for SHA-256 5954388a79d36d6b…

MALICIOUS

PDF

74.2 KB Created: 2021-09-09 20:49:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1a25e11688e2517c42c7d761ff98cf5c SHA-1: 44cc5f14957a89621e23bc31ebd630602390676f SHA-256: 5954388a79d36d6bf22720780969b54a49ebd8d390526e7bcb37e87b6bd734d4
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are hosted on disposable domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm, suggesting a phishing or malware distribution scheme. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://cmtl.in/uploads/userfiles/file/file/mebefibolomuwedavarazalok.pdf In PDF document text
    • http://i-p-p-c.com/ckfinder/userfiles/files/mojewisojekito.pdfIn PDF document text
    • http://travelsi.ru/ckfinder/userfiles/files/63510073527.pdfIn PDF document text
    • https://www.gpaci.org.br/cms/ckfinder/userfiles/files/tilarazijepodexufotez.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/duliweduzifozibilujipi.pdfIn PDF document text
    • http://gamboeng.com/assets/ckfinder/userfiles/files/vadenipini.pdfIn PDF document text
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mekimedogezidizu.pdfIn PDF document text
    • http://betonkeritesek.eu/Content/files/77296658560.pdfIn PDF document text
    • http://marsalanoleggio.it/userfiles/files/23754943916.pdfIn PDF document text
    • http://cosyromania.com/media/file/48259139278.pdfIn PDF document text
    • http://cathyknightwaite.com/ckfinder/userfiles/files/20883519746.pdfIn PDF document text
    • https://www.shipgo17.com/plugin/ckeditor/ckfinder/userfiles/files/nevanokinuvujazebun.pdfIn PDF document text
    • http://sun-marche.com/app/webroot/js/ckfinder/userfiles/files/85040164578.pdfIn PDF document text
    • https://piataafacerilor.ro/app/webroot/files/userfiles/files/dukoxesupa.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/kebilafumusekutim.pdfIn PDF document text
    • http://sedaciesupravy.sk/media/file/xupejupewuwalavep.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/d9b989fa2791461abfee1da73cddbb8b/67392172167.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/29545005120.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16135dbe71d9f2---lopejifufojefovire.pdfIn PDF document text
    • http://pro-customer.de/userfiles/file/84500376024.pdfIn PDF document text
    • https://emailing-online.fr/uploads/userfiles/file/sagegutox.pdfIn PDF document text
    • http://luckdidea.com/ckfinder/images_store/files/pedufumewozulofubafuv.pdfIn PDF document text
    • http://china-zub.ru/userfiles/file/zonimidowigesopoka.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=among+us+all+skins+pets+and+hats+apkPDF 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_off0000c0b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d8c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C6 16240 bytes
SHA-256: 9e41e3b581627327fa1f17ef60298fda36b78c63060932cb74966b330e719fed
font_02_sfnt_off00010280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10280 10912 bytes
SHA-256: 4255fb56e375f564658d1c9e4fc47f2a33d2543f7823930fe77c65f40a89eafe