Malicious PDF — malware analysis report

Static analysis result for SHA-256 7414067fc58733b0…

MALICIOUS

PDF

84.8 KB Created: 2021-09-16 19:11:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ec9b50d53a0ccc8ebfed41ec78204541 SHA-1: 88353625f6ec08ebb91011345dc3ea052d4aebad SHA-256: 7414067fc58733b0339a52ca550ef6c3cecd51e7e33523b602b8a08f6ae92d6b
176 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a large number of external links, many hosted on compromised or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this. While no scripts were explicitly extracted, the nature of the links and the phishing detection indicate a malicious intent, likely to lure users into phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://laborke.ru/uplcv?utm_term=scoprire+password+wifi+android+root PDF link annotation
    • http://houstontca.org/Content/uploads/files/jusikedas.pdfIn PDF document text
    • https://wodepcb.cn/uploadfiles/files/wemojowiwowijud.pdfIn PDF document text
    • http://women-for-marriage.com/ckfinder/userfiles/files/diragemuzovope.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd532c4714---80418190911.pdfIn PDF document text
    • https://oreopay57.com/ckfinder/userfiles/files/jiledoxo.pdfIn PDF document text
    • http://polimak.pl/userfiles/file/77120876057.pdfIn PDF document text
    • http://inphilong.com/upload/files/89776362632.pdfIn PDF document text
    • http://okeefesreef.com/ckfinder/userfiles/files/bewumulole.pdfIn PDF document text
    • https://sgotomotiv.org/upload/files/21099766104.pdfIn PDF document text
    • http://zzzwchem.com/upload/files/13662287883.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1613e50bd9a33d---14851967485.pdfIn PDF document text
    • https://florerialafloresta.com/ckfinder/userfiles/files/83243213882.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613248fecd4eb---robalefaxuvajuliwaleki.pdfIn PDF document text
    • http://hstairan.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/zododaboboxojubokowoboda.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16136f43fec55c---vupewenefokilezinogar.pdfIn PDF document text
    • http://agrostroi-proekt.ru/ckfinder/userfiles/files/tanikalabosomigodevite.pdfIn PDF document text
    • http://digifast.cz/userfiles/laxonuporifetazibumirujo.pdfIn PDF document text
    • http://vegman-kzn.com/ckfinder/userfiles/files/vasosavanasowu.pdfIn PDF document text
    • http://technimexvn.com/images/ckeditor/files/65640380067.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/novuzudabaxitifugozejujo.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/povogepiwip.pdfIn PDF document text
    • http://yepuco.com/uploads/files/77654551498.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/vodudijikejaxowugi.pdfIn PDF document text
    • 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_off0000e4f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F6 18464 bytes
SHA-256: 9bb6e43cffd062d70180629b46d42731b6ebf66e00972bd04de2825bb11033e7
font_01_sfnt_off000114da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012cf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF1 10728 bytes
SHA-256: 021770a0078febe4db26ef1a250937ec5cf4efabe8dfcbc289a7f80aebff036e

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