Malicious PDF — malware analysis report

Static analysis result for SHA-256 c00db01d7f554681…

MALICIOUS

PDF

69.6 KB Created: 2021-09-28 02:04:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 03206b8ec94eee56e65d5ca51cda040b SHA-1: 3354ad28b6ae41de87e70237b10a95406d3350b0 SHA-256: c00db01d7f55468183217abe82fb8a8f38b10c3f9ef5a9727c5168fabd00494e
164 Risk Score

Malware Insights

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

This PDF contains embedded JavaScript and a significant number of external links, many pointing to compromised WordPress sites or disposable hosting. The embedded JavaScript likely facilitates the redirection to these external URLs, which are designed to host further malicious content or phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://precedent.by/_newsite/images_from_html_editor/file/78728800131.pdf In PDF document text
    • http://origo.ws/userfiles/file/76558393159.pdfIn PDF document text
    • http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/kisibaxonawokigivive.pdfIn PDF document text
    • http://kozhencherrymtc.org/userfiles/file/xopupepiluteli.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc054c294b---muwoz.pdfIn PDF document text
    • https://bevasilicones.in/userfiles/file/duvafevulabuziw.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/161406504665c6---musabifadumepuronoj.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1613f8abae476a---zonijoganozigatijuvokex.pdfIn PDF document text
    • http://ruben.pl/ckfinder/userfiles/files/digirafag.pdfIn PDF document text
    • http://balone.net/_upload/file///57592817896.pdfIn PDF document text
    • http://jinsonmetal.com/Upload/file/30868863827.pdfIn PDF document text
    • https://digicpictures.com/downloads/sagijanunixukuvido.pdfIn PDF document text
    • https://phuquiland.com/upload/files/41619956670.pdfIn PDF document text
    • https://snpwachq.com/files/js/ckfinder/userfiles/files/10016955271.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16130619bc1e34---65288929703.pdfIn PDF document text
    • https://ibshospitals.com/userfiles/file/85411557855.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/8jjc38uqbua1o85uu64te70tu5/3412216841.pdfIn PDF document text
    • https://aviatroglo.fr/IMG/file/lebinowuzijupibigasusu.pdfIn PDF document text
    • http://chuaphucluong.com/uploads/image/files/vukekotitut.pdfIn PDF document text
    • https://www.comperat-89.fr/ckfinder/userfiles/files/34150665781.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615152b5a8e88---petisejagofibidalolube.pdfIn PDF document text
    • https://sunridgecorp.com/uploads/files/202109222314341995.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/kishqj38r10tne5t10i88g8tl6/87223784958.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/35452126926.pdfIn PDF document text
    • https://southafricapools.com/contents/files/36034841182.pdfIn PDF document text
    • https://ecohort.biz/userfiles/files/wikefejironul.pdfIn PDF document text
    • https://jaurrieta.net/USERFILES_JAURRIETA/files/81147554995.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=vip+miner+apkPDF 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_off0000b37e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB37E 10040 bytes
SHA-256: ef2627748f0e22eef29951c738606d31122c430dd52b4f235499086af88e2645
font_01_sfnt_off0000c9b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B5 15708 bytes
SHA-256: 58d36ae824ba8f6fa12b61560b102be3827c7ead29838ec543501c0d2c100037
font_02_sfnt_off0000f0d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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