Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e02dac221233ae5…

MALICIOUS

PDF

81.5 KB Created: 2021-09-21 03:36:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 84b3a8ad739539a6ac0ae3b3a5e9da1c SHA-1: 01a8bb11a22ab207f74b74cb3dba2f9896e7cd21 SHA-256: 0e02dac221233ae527376ebee7e4b325f3aa5b1e71ec56a64cc26f62ca3e789f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting an attempt to distribute malicious content or phish users. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://irlanc.ru/uplcv?utm_term=ds+rom+files PDF link annotation
    • http://cleversystems.ru/userfiles/file/zusavosetajenudimowu.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/161451fd525360---7215391859.pdfIn PDF document text
    • http://photo-poligrafic.ru/ckfinder/userfiles/files/rufotufawulu.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/161442cdf0401c---35036231589.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/161412d61c76b0---15030674102.pdfIn PDF document text
    • https://sandp-engineering.com/ckfinder/userfiles/files/talibixazutuwazavok.pdfIn PDF document text
    • https://phm.vn/upload/files/44252976047.pdfIn PDF document text
    • http://longarmquiltingacadamy.com/fckeditor/userfiles/file/kanaxolotobobo.pdfIn PDF document text
    • http://hangnhatbanonline.com/upload/files/64765408642.pdfIn PDF document text
    • http://doks-films.com/pcms/content/file/94699460495.pdfIn PDF document text
    • http://weddingdove.tw/uploads/files/202109011353296707.pdfIn PDF document text
    • https://tidurmalam.com/contents/files/nefaxilimoxetom.pdfIn PDF document text
    • http://chaukitchen.com/uploads/files/bezebolosepa.pdfIn PDF document text
    • https://testpensija.bankai.lv/ckfinder/userfiles/files/mojifupatobitibosifupukis.pdfIn PDF document text
    • http://ge-mak.com/files/44814734169.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bb38dba90c---disezudimevenosozowu.pdfIn PDF document text
    • http://www.lukoilmarine.com/ckfinder/userfiles/files/26038323313.pdfIn PDF document text
    • http://highspiritsmusic.com/ckfinder/userfiles/files/gupoxusidagub.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/57528233937.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/zujiwepunava.pdfIn PDF document text
    • https://hopadive.cz/ckfinder/userfiles/files/8969204989.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/76900716901.pdfIn PDF document text
    • http://aviapartner.biz/js/ckfinder/userfiles/files/vozep.pdfIn PDF document text
    • https://hattshopping.com/admin/assets/images/ckfiles/kufofemitumimonezim.pdfIn PDF document text
    • http://fujiya-la.com/uploads/files/24948862862.pdfIn PDF document text
    • 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_off0000dd13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD13 17744 bytes
SHA-256: 5cda91d62a684acd9cf4e35a36d62e700fcb40e5833f5133a9fa7e85dbac4bac
font_01_sfnt_off00010ad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000122ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122EF 10012 bytes
SHA-256: 1dda68ca99b8346778bb30f7fa412c864164485b89dd57e382b5643f91e92b3a

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