Malicious PDF — malware analysis report

Static analysis result for SHA-256 060cdecb6533331e…

MALICIOUS

PDF

70.7 KB Created: 2021-09-28 08:24:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 57fc8daa4bb0a40b65dc95892c3bacd1 SHA-1: 74347b60fc354cf94a751febe59e58d29a8a7388 SHA-256: 060cdecb6533331e67464e238f4778ea4d3b32817a2341eedc4df85a03f2a99b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which are likely part of a link farm designed to obscure the ultimate destination. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a phishing or malicious redirection scheme. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • 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.
  • 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://maryamghiasi.com/images/upload/files/48797201064.pdf In PDF document text
    • http://studiotecnicoprato.eu/userfiles/files/fovitejagi.pdfIn PDF document text
    • https://rivieresoceanie.com/ckfinder/userfiles/files/nuzosininaweruxamagiruv.pdfIn PDF document text
    • https://itandem.net/ckfinder/userfiles/files/lijuxakekasozuzibati.pdfIn PDF document text
    • http://thanhtindesign.vn/uploads/image/files/botazaxezewatejakudotaxak.pdfIn PDF document text
    • http://montoaneli.com/ckfinder/files/8349030920.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/161362a4625c0a---82068217366.pdfIn PDF document text
    • http://dansungsala.com/uploads/files/91387610802.pdfIn PDF document text
    • http://anm-av.de/uploads/files/40603723456.pdfIn PDF document text
    • http://hzqljsj.com/images/upload/File/29696840944.pdfIn PDF document text
    • https://thingstodobahrain.net/ckfinder/userfiles/files/wodizijijedodovukatepi.pdfIn PDF document text
    • http://sendedianqi.com/upload_fck/file/2021-9-19/20210919105327569842.pdfIn PDF document text
    • http://globalnetworks.de/www.galabau-poscher.de/main/preview/ckfinder/userfiles/files/25571253519.pdfIn PDF document text
    • http://cichanski.com/Upload/file/30117472863.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614f9d33de8bc---xobudetigelubaselewimovu.pdfIn PDF document text
    • https://karate2.cdmedia.pl/userfiles/file/77720554439.pdfIn PDF document text
    • https://sindicav.com.br/ckeditor/ckfinder/userfiles/files/romat.pdfIn PDF document text
    • https://www.idd.no/ckfinder/userfiles/files/89809896986.pdfIn PDF document text
    • https://gospel-streams.com/asset/ckfinder/userfiles/files/66895478170.pdfIn PDF document text
    • https://biblioteka-koneck.pl/ckfinder/userfiles/files/11596159907.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/lozokofukom.pdfIn PDF document text
    • http://school19-zav.ru/userfiles/file/53211059989.pdfIn PDF document text
    • http://csc0535.com/userfiles/file/20210912191834_0g7s6g.pdfIn PDF document text
    • http://chargooshads.com/images/upload/files/bokejosenaputatojiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=things+not+to+do+in+minecraftPDF 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_off0000b3e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cbf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF8 10840 bytes
SHA-256: 147f828ba51e4f30b2f8b54a0d5f878b2a88aabb39777bd63b1c8c80298fc5d9
font_02_sfnt_off0000e48e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48E 16008 bytes
SHA-256: bc434d72b9d1b08c392ad47166bcaf961e8bd8b59520e6855a54610be61efc6b