Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca501b2364eed56e…

MALICIOUS

PDF

92.8 KB Created: 2021-06-25 19:11:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 4a7dfe62455e771ef5a727222495443a SHA-1: 463869152a8f3205b46d66896ed7b089f6028aa0 SHA-256: ca501b2364eed56e8bfa021e2aed2b1da562271af05d2c84617e2b00985f48cf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature. The file's structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9810

Heuristics 6

  • 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.
  • 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://pistant.ru/uplcv?utm_term=riddle+poems+for+kids PDF link annotation
    • https://np21bellapalermoshopping.it/file/xuvapuxolokusej.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/sasopidodiwibo.pdfIn PDF document text
    • http://pomocnaukowa.net/Upload/file/25901204395.pdfIn PDF document text
    • http://brukbet.com/user_images/file/dijufaje.pdfIn PDF document text
    • http://playeasypiano.com/resources/fck_images/goponisupusijijibekori.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/sonobiwavogameponebolesiw.pdfIn PDF document text
    • http://bclgrouptt.com/userfiles/file/toxixifefosani.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/ecfae41b3299e8bf591d82eee10a9a96/93315749586.pdfIn PDF document text
    • http://c2ctrading.org/cms_upload/files/46428386704.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0007da993---99782919720.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/kipuromarasudidapabi.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/766e71c91225a5d5a6338032acf156d4/66038705187.pdfIn PDF document text
    • http://synerfreight.com/syner_upload/images/files/67102176586.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/40bff8c4599c7cc6c76d36e051573761/ranuresuk.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160976c81dcd81---gitozubonaromimazodenomo.pdfIn PDF document text
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/gubaperukazuwesobaruzafoz.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/05aa15d33e4d9ad82274c4d8624212ad/49048502614.pdfIn PDF document text
    • https://tajeer.co/userfiles/file/33069155526.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/71306131018.pdfIn PDF document text
    • http://artospace.com/pics/file/41369037969.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/9ef4678d64dce0c29dccef02e651d8cb/21746620357.pdfIn PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/nubijalafelif.pdfIn PDF document text
    • http://uticahighclassof78.com/clients/8/89/89c70e22fe5ad1405280b455f64975d7/File/48554687610.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b06683ac675---xukizijevoxaxezi.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160b0554b0ea32---tujipewerivasadego.pdfIn PDF document text
    • http://wmc21.com/ckupload/files/bipaxo.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_off00010a82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A82 10432 bytes
SHA-256: 57bf6c867705815c1c5fb82a568f4faf0177621d80caafd78c4f4c5e717a15c2
font_01_sfnt_off00012213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12213 16924 bytes
SHA-256: 850e1e4c1de71f58743c90f67c190c973114c96a809da85f8e1df639dacb7f57
font_02_sfnt_off00014dea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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