Malicious PDF — malware analysis report

Static analysis result for SHA-256 32825493912000be…

MALICIOUS

PDF

80.8 KB Created: 2021-09-07 00:36:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f56482dc00e844edf64419aa81de59fe SHA-1: 23eafe8404233581b55af0e9500a4b343122988a SHA-256: 32825493912000bec3260abc61c7dc7a509b7ed9f120d2501e71f0655c909c4d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to redirect users to malicious websites or download further payloads. Several heuristics indicate the PDF is part of a link farm hosted on compromised WordPress sites, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088b1fa12e03---89778524257.pdf In PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/tdic6efbpjjl6juakfs8h8afhc/mujuzotolivenilosadijej.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/mezexokawuz.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/243420e96787c9fe60c1c9d1254a45d2/82342838297.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609d300349613---22157619403.pdfIn PDF document text
    • http://donghocasiochinhhang.net/uploads/userfiles/file/30544581539.pdfIn PDF document text
    • http://dokturmice.com/ckfinder/userfiles/files/wetezufivifofibi.pdfIn PDF document text
    • https://www.rapn.ru/ckfinder/userfiles/files/metanexoso.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b02e896057a---49702656563.pdfIn PDF document text
    • http://skyrun-arser.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210622221212746426nh7sxj.pdfIn PDF document text
    • https://narimasu-chintai.net/jcfiles/file/52047102261.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8578b8741---motogakituferutexagaburu.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/xinamisevomagutiwaroridum.pdfIn PDF document text
    • https://zakarpattya-tour.com/upload/49177089142.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/sirovaxagivamiwul.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a90c8598bb8---4991206186.pdfIn PDF document text
    • http://at2apigroup3.com/contents//files/jasuxatoreboverosoverazi.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2eb6ea24b5---nugefotebixamenezamuretid.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/ejqupvso7jgae1i1p2lt0fvpl2/jusutamubopenadixupaga.pdfIn PDF document text
    • http://abcbyspu.net/ckfinder/images_store/files/64465099792.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/uk9plndrhhumo7d2lt5r8p82m2/pixufarudededonerej.pdfIn PDF document text
    • https://uppersanduskyrotary.com/cms/files/File/gafepafutokofumi.pdfIn PDF document text
    • https://assignmentmart.com/ckfinder/userfiles/files/78575981049.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/573137d6da9833cc83d4c670413ea0dc/kebedabulufe.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba55fbdc1ef---kaxopesamisop.pdfIn PDF document text
    • http://xn--80adpfaaeictf0c6c7i.xn--p1ai/public/file/luxusa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=constitution+of+azerbaijan+republic+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_off0000d75c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD75C 11076 bytes
SHA-256: d22c6521fea442a8c9f832d81abbfafc2c070b0125ef2c696ab0dcf817edfdba
font_01_sfnt_off0000f11f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11F 16844 bytes
SHA-256: a3653eb42c16902ca6a37c35c4371439e30980ff87c7e7f52db26efb23a588c1
font_02_sfnt_off00011cc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1