Malicious PDF — malware analysis report

Static analysis result for SHA-256 949b57e4bab48a4c…

MALICIOUS

PDF

91.5 KB Created: 2021-07-28 08:15:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3bdc1100b73697745591cb28f84b49f8 SHA-1: 3bfc17458aae93b49479ee41fdbde000fe5c94ec SHA-256: 949b57e4bab48a4c981b4474f4ec78a0024ec2b843e9d7f89045a1cefde7621a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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.
  • 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://autosklo.sk/pictures/file/jizefigimez.pdf In PDF document text
    • https://electrabicycles.pl/app/webroot/uploads/file/16256733594806.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3f41bb4a9---98900928980.pdfIn PDF document text
    • https://birotex.rs/images/files/18619528738.pdfIn PDF document text
    • https://hondaotohaiphong.vn/upload/files/gunusepadujisex.pdfIn PDF document text
    • http://htwy.com/upload/file/78338350199.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd1ddb484c---42339015231.pdfIn PDF document text
    • http://lezeckastenakosice.sk/upload/files/58533409646.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/c5cdd3934e9eba97af32bb84ec0c5b13/dawab.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/41420805989.pdfIn PDF document text
    • http://tantex.org/tantex/tantexuserfiles/file/47410075597.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160bb9867012e1---timaxetazarebitujerik.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160a250fb945c7---93390223068.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/82017563319.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1609515e8bee97---gixod.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/1gamhcag8vkkae8mk0meru6duv/vanelopozogarulidotow.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/6ibafr32qebpjvuihppf6of5ce/naxogudipe.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/500ca77005febb35ec702a103fac0630/fenisubit.pdfIn PDF document text
    • http://wajl.net/img/file/2021619184859.pdfIn PDF document text
    • https://mariapolis.net/ckfinder/userfiles/files/93550143755.pdfIn PDF document text
    • http://taiyoaquris.cn/upload/userfiles/files/20210716042226.pdfIn PDF document text
    • https://mattress-leader.com/media/13266961837.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/dc9c93aba49e9f545d9196003edb3088/mabasuf.pdfIn PDF document text
    • https://hosvagyok.hu/userfiles/file/71853973639.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=freedom+writers+full+movie+online+for+freePDF 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_off000103ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011bd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD1 10580 bytes
SHA-256: 7aee49af7c9815b3bb5d435cac616e3f5d7806c9e7b45182af7f7b6c940c01f8
font_02_sfnt_off000133fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133FB 16676 bytes
SHA-256: 23a02650ff656da94f14359328840929152974f3768e67031b75020daed473ff

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