Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0e0ade651a8b9c6…

MALICIOUS

PDF

82.1 KB Created: 2021-09-07 08:49:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: e1a3cf4dc616716d4a220bb3d6e76360 SHA-1: bd043aadbf1107b8e71e57ef8567e3c0dce34b88 SHA-256: d0e0ade651a8b9c6496cf66aac6425721f7b18535ba4809c644b9a7ab034d6bb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to lead users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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 https://liho.cz/UserFiles/File/pataj.pdf In PDF document text
    • https://hongmao.tw/uploads/files/202108181551081273.pdfIn PDF document text
    • http://pc75.net/upfiles/file/1627270340.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/07ee86b420aa3774a564a661915cc2f9/91191120285.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe5ad92b5ce---nomonimonufopisupopuvuv.pdfIn PDF document text
    • http://geosond.pl/userfiles/file/19140903053.pdfIn PDF document text
    • http://wo-kop.pl/userfiles/file/pudutujibopo.pdfIn PDF document text
    • http://hongpakthai.com/ckfinder/userfiles/files/13147268540.pdfIn PDF document text
    • http://pleasanthillpchurch.com/clients/5/55/55aa087cacc886b2254ddcc242c0699b/File/goxosexini.pdfIn PDF document text
    • http://one9five.com/userfiles/files/37266799296.pdfIn PDF document text
    • http://scottleddy.net/clients/862555/File/21483821437.pdfIn PDF document text
    • http://feach.ie/images/uploads/file/51306240190.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/kipopisidodetozutovi.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/d2d875b7b3d8decc41205d9e242f800f/98371272452.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/1ea03amjl7ufvml2b6ed0c07ka/ledesozuxepipabevuwawepul.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/161301ad490c26---39490285102.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/vijomefogufow.pdfIn PDF document text
    • http://apsons.eu/files/file/93077098290.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/c6aa3174712cee8fe9638d2f19bbd9cb/50389880175.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/4383695401.pdfIn PDF document text
    • http://temple.mo/userfiles/file/20110836623.pdfIn PDF document text
    • http://katyababash.com/images/uploads/file/lanotepuwejevumijog.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160798e07bb710---43657842850.pdfIn PDF document text
    • http://scmsalliance.com/clients/864514/File/zipebuzupumozipiwukef.pdfIn PDF document text
    • http://yidaig.com/uploadfile/file/20210814160006.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/8c4e9aa05e9f2ba5f116b31580c331db/13494513402.pdfIn PDF document text
    • http://re-view.online/fckFiles/file/netiwavinijiluwozesapo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=seringas+e+agulhas+pdfPDF 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_off0000d868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD868 10736 bytes
SHA-256: bbd70bff2e89987c3ee8de8dd402c1d8bd3fa05fee89f056af99680f9c953329
font_01_sfnt_off0000f0b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B2 19860 bytes
SHA-256: 7e2736058545de76486fe06498dd24816191392e21f4bade171c19c936668f0a
font_02_sfnt_off000122a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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