Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b24c833d18edc1c…

MALICIOUS

PDF

72.2 KB Created: 2021-09-11 08:47:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 65227381b06bd25fc9951007733186a8 SHA-1: ad5182abb965de930a05868570b3e5e5afeff3b0 SHA-256: 3b24c833d18edc1c294f6463c0edba308bc477128ada5b1ef7d5782304982b74
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting. The heuristic 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' indicates a pattern of using compromised WordPress sites for hosting malicious files. The embedded JavaScript likely facilitates the redirection or download of further malicious content, contributing to a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://ultralloy.net/upload/files/25455687999.pdf In PDF document text
    • http://pjcwyy.com/upload/file/buziliguwirujogemufubobox.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/65623442492.pdfIn PDF document text
    • http://xn--38-mlcqjbufcz6h.xn--p1ai/userfiles/file/97723158172.pdfIn PDF document text
    • https://ratosatu.com/contents/files/61460334642.pdfIn PDF document text
    • https://actorconseil.com/files/file/punutatobogepuneneleri.pdfIn PDF document text
    • https://dnm.tw/uploads/files/202109101519197666.pdfIn PDF document text
    • https://sanipro.ma/app/webroot/uploaderfiles/xovudelejideruk.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/e2b6ebc4a3681cea94676f2eb285cce7/vesenaxejewujasisetusobi.pdfIn PDF document text
    • http://kimhoatra.vn/upload/fckimagesfile/mojupufexin.pdfIn PDF document text
    • http://offerseir.com/basefile/offerseircom/files/namijitowarosu.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16132f07d3fb59---xukobobejas.pdfIn PDF document text
    • http://studiotecnicofrisoli.com/userfiles/files/27974663456.pdfIn PDF document text
    • http://simkoongschool.com/uploads/editer/files/fofifufutuzelopo.pdfIn PDF document text
    • https://flavio-tonon.it/public/file/dipapirobavifurok.pdfIn PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210909202813.pdfIn PDF document text
    • http://didopack.com/files/pulejarunusezixinamixo.pdfIn PDF document text
    • http://eca.or.th/ckfinder/userfiles/files/65166609095.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1613be8b5e277d---mofaxesurazilagat.pdfIn PDF document text
    • http://k3projekt.pl/uploads/userfiles/files/13374647403.pdfIn PDF document text
    • http://serextion2006.com/js/upload/files/xikupameji.pdfIn PDF document text
    • http://indagosrl.it/userfiles/files/698016989.pdfIn PDF document text
    • http://yacpa.org/yacpafiles/file/dubawugefaroj.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/31736808193.pdfIn PDF document text
    • http://boilerservis.ru/uploads/files/94504282391.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/93411504142.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/16908302544.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=english+file+intermediate+answer+keyPDF 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_off0000b7ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7EA 10956 bytes
SHA-256: ba84cbc9d7434db144c31b337e03909155ebc05d06efe12cf7ea9e156afb5a3c
font_01_sfnt_off0000d0f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F1 16864 bytes
SHA-256: d7c92b686841a3edb8ef45f670c03abd3271f931d063b84090d4e077f27285cc
font_02_sfnt_off0000fae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.