Malicious PDF — malware analysis report

Static analysis result for SHA-256 c69a1c22a940eaaf…

MALICIOUS

PDF

115.0 KB Created: 2021-08-21 23:14:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5a0a2569c6bf76994f68ac4b67975c13 SHA-1: 1be529e3a5c9257658db4cf60149243131db7398 SHA-256: c69a1c22a940eaaf1b593c756cae3e06a25bc566b6d63824cca6a76fb95b4567
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised or disposable hosting, indicating a link farm designed to distribute malicious content. The presence of embedded JavaScript and ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely phishing or malware delivery. The file's structure and URL patterns suggest it's part of a phishing campaign, potentially using spearphishing attachments as the initial vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9896

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 https://canionglobal.com/FCKeditor/file/74620049530.pdf In PDF document text
    • http://dansensvenner.dk/imagesfile///28188052141.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/amprdebpk9o39ooea9kmoukonm/88260885903.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/a71d35fd398aa0854dafd6f67e29289f/9556753892.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8a580893e---biwomemedoxezizono.pdfIn PDF document text
    • https://creteservices.com/FCKeditor/userimages/file/77844468786.pdfIn PDF document text
    • http://www.papelerialapiceros.es/ckfinder/userfiles/files/dagotowatedolowo.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f6bcabee44f---loxiwabusafukofekalisux.pdfIn PDF document text
    • http://dblbtech.com/userfiles/file/57805015650.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160711edb35fc1---48839972619.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6a9813bc0---polinikipane.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/48cde49a90189bb10ffb8759d115fd10/50311874052.pdfIn PDF document text
    • https://supermagnum-bg.com/ckfinder/userfiles/files/11989028182.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/2e508139711b0eb9cdca70fa0aa4adeb/39142386529.pdfIn PDF document text
    • http://cateringkieuan.com/uploads/userfiles/file/rubolug.pdfIn PDF document text
    • http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/57392367262.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1607a422d8a4f1---92114663604.pdfIn PDF document text
    • http://steelbo.com/uploads/admins/u0/files/20210607051546.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/28214699417.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///tekobulo.pdfIn PDF document text
    • http://jmdfhjl.com/fckeditor/userimages/file/fawekuzulezupajomalivadi.pdfIn PDF document text
    • https://www.acta-mobilier.fr/ckfinder/userfiles/files/44458633039.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/nikavinozelenaremeruzos.pdfIn PDF document text
    • http://yngc.ru/admin/ckfinder/userfiles/files/98026478464.pdfIn PDF document text
    • http://dfwarbitrator.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/ladojomisufojokiv.pdfIn PDF document text
    • https://tavio.ru/files/file/dogokitituxutud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=las+10+caracter%C3%ADsticas+de+la+investigaci%C3%B3n+cient%C3%ADfica+m%C3%A1s+importantesPDF 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_off000157f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157F5 11540 bytes
SHA-256: 967104a19e431eb5824ca6d782bf0a64085601aae91c77741626eefe557b5a21
font_01_sfnt_off00017271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17271 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018a83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A83 18492 bytes
SHA-256: ab66c8577d221fe115b53df8fd1ac325e823cd4326f29771360c039e7f0a2323

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