Malicious PDF — malware analysis report

Static analysis result for SHA-256 93ebf3d73bb12dfa…

MALICIOUS

PDF

74.3 KB Created: 2021-10-03 07:56:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 6f8ac049f1702a5c91968c7154987c5b SHA-1: e7e11513e8e6316a62aa2bc76f1bd2785d4e02d7 SHA-256: 93ebf3d73bb12dfabf755afe02f96c9467a393cbf862efef18b3451376f69281
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to exploit user trust.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614a01bbe3ee8---kotejetafenuwifuw.pdf In PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f227607d4c---88659681641.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/0761940d9aad13309522930ed7fd76b4/82556681509.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f04636d693---zedonoza.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d1fe43d818---totivoxanixovawajeto.pdfIn PDF document text
    • https://www.supremecaravans.com.au/application/third_party/ckfinder/userfiles/files/pimoxarigudokozixoz.pdfIn PDF document text
    • https://m-astar.com/UserFiles/files/dekiwexadasavofonigotus.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/161393d6debf14---91009618863.pdfIn PDF document text
    • https://www.dooleysnaturalgas.com/ckfinder/userfiles/files/36678293410.pdfIn PDF document text
    • http://benthanhsgfarm.com/images/uploads/files/40478245035.pdfIn PDF document text
    • http://www.tiendadelbordado.com/ckfinder/userfiles/files/33499483530.pdfIn PDF document text
    • http://ji-tien.com/userfiles/file/jerisigisovemowimufuwe.pdfIn PDF document text
    • http://etoprosto.ru/ckfinder/userfiles/files/lewedexafetikep.pdfIn PDF document text
    • http://petra-dario.info/upload/datoteke/mobabisifodet.pdfIn PDF document text
    • https://oreopay58.com/ckfinder/userfiles/files/256507128.pdfIn PDF document text
    • https://fereshtegan.net/basefile/fereshtegannet/files/guvovirapi.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613c8cf5a41c1---15202101197.pdfIn PDF document text
    • http://parkingparts.com/Upfiles/file/xesojipixelami.pdfIn PDF document text
    • https://sedefartphotography.com/resimler/files/20982099782.pdfIn PDF document text
    • https://hotararicedo.ro/files/files/55615272095.pdfIn PDF document text
    • http://katachizu.com/img/news/files/vidojofutuzakipado.pdfIn PDF document text
    • http://okna-dvere-online.cz/media/upload/upload/file/wesipesipusu.pdfIn PDF document text
    • http://kliknetezde.cz/admin/obrazky/file/14127582290.pdfIn PDF document text
    • http://sfipl.in/userfiles/file/gudasumuludu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140beb157c86---82589927939.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=your+windows+license+will+expire+soon+windows+10+pro+fixPDF 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_off0000ba87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA87 17656 bytes
SHA-256: 64457a006202857435bfefd8b56345278c365e46eb291631312ed39cf74c8a2e
font_01_sfnt_off0000e7da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF1 10796 bytes
SHA-256: c5861d9418c11fe1870637d65fe6a3147269faf43b0b42df1c5b907b0fd4ceed