Malicious PDF — malware analysis report

Static analysis result for SHA-256 66f42c687873edb8…

MALICIOUS

PDF

95.1 KB Created: 2021-07-31 15:05:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5cd4f68051f6b435687ca5010f386422 SHA-1: 88e80469b5f1574a11ad201b494022720fa960bd SHA-256: 66f42c687873edb84cc92afa8f77e25e722198dc0d741841eea4eca54993c1e3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The presence of numerous links pointing to compromised WordPress upload directories and disposable hosting suggests a link farm designed to obscure the ultimate destination or host malicious files. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e889205544---xinipijamefepopid.pdf In PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/41842094470.pdfIn PDF document text
    • http://mfahk.com/upload/files/fisufutimevidufago.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703f9387776---tarorinikifowuvipimuzib.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/baeaec85514d7d6d4def298bf79e8793/10203992067.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1610066bd4c1fc---35630592564.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608328891517f---pavutesetaxozatejokefud.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd7acb4ab9---jinofobelivuva.pdfIn PDF document text
    • http://mea-travel.pl/userfiles/file/rusugegito.pdfIn PDF document text
    • http://www.park-seversk.ru/other/js/ckfinder/userfiles/files/filobetigenikalakomaradaw.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608744dfb675a---bumukojovaretebamopumojir.pdfIn PDF document text
    • https://thinkglobalcompliance.com/ckfinder/userfiles/files/4207565900.pdfIn PDF document text
    • http://mesterek.net/tmp/57867780730.pdfIn PDF document text
    • http://pune-india.info/userfiles/file/23048596777.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/1fddb66e8076b1b8b12cba0f11ef34f5/57016463953.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/71749989997.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/58325119383.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/dd52a944015e48e668551229966910b7/27146240359.pdfIn PDF document text
    • http://rudolphalexander.com/uploads/files/87427950790.pdfIn PDF document text
    • https://mcq-exambd.com/app/webroot/ckfinder/userfiles/files/22666422935.pdfIn PDF document text
    • https://rhuyscampingcar.fr/images/files/10884685969.pdfIn PDF document text
    • https://datatech-int.com/userfiles/file/zumulemevimakesulixe.pdfIn PDF document text
    • http://lotusromeo.fr/app/webroot/files/userfiles/files/voponamezoberonisavi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=ejemplos+de+oraciones+en+presente+perfecto+progresivo+afirmativasPDF 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_off00010b1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B1D 11144 bytes
SHA-256: 667211c7cef09301f8a60855dbf0527594f7e87c17effcb8e97dfa5934896e7a
font_01_sfnt_off000124dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124DD 18260 bytes
SHA-256: 60cc1be99c0402b37aa18a75f899831362b7eba1562183f81975e4c2c450af26
font_02_sfnt_off00015369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15369 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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