Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2e5f360711da419…

MALICIOUS

PDF

91.9 KB Created: 2021-07-07 06:15:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 3aacb678cb4d7d43274dd05880bd9242 SHA-1: 2eb3c34f539e170a05447a826f4b1a29af54659c SHA-256: d2e5f360711da419ad9db344ca47a8a6301d47551051948781139061c13f6944
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other disposable hosting. These links likely serve as lures for phishing attacks or to distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • 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.
  • 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://coretry.ru/uplcv?utm_term=bank+of+tron+fast PDF link annotation
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16098c0156fb27---suxitavutoz.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cac0c847cd---40054366704.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/98499551658.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607232b0ad87e---6742752425.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/87caaadca1ebf58550ef47e73b86e83e/lelobik.pdfIn PDF document text
    • http://quanhoangtsi.com/upload/quangtri/files/93857231394.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/e0f359833feaf8ad3c789b9a0faf1eaf/82513848236.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16093c91e26724---98647680802.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078025f3659c---posane.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/1658fvdck3fq37n15an7pvino6/dolowibawunonuzebedaguso.pdfIn PDF document text
    • http://jhsclassof63.com/clients/c/c8/c8cc7cee7579ddcd469b669c0eb172d8/File/13185674114.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/54t1kl43qaqt9ipmf4076ln51v/pukoreboxakabimugus.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/xusedapuwibopinawidatinok.pdfIn PDF document text
    • http://mopron.ru/upload/files/59240721754.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/2ba44a1bab5f3c7dee8b7c34d06bd588/zabegewogikaranamat.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/2934766896c0292b78365f3baeac4c3d/66697522237.pdfIn PDF document text
    • https://ivanamihic.com//files/powimesiweguzunonolax.pdfIn PDF document text
    • https://georeno.ca/userfiles/files/84323445148.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/46c9646d4ce12b84d9435ca6a5b67498/pebasegijizik.pdfIn PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/tmo12abso331pi3efeagkkaquf/jisefakitetivizetej.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160919bac4a20d---4813134044.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e35d0b84ddb---13913502243.pdfIn PDF document text
    • http://omak1968.com/clients/71178/File/fisalubejidavod.pdfIn PDF document text
    • https://audit-advisers.com/userfiles/file/kowojovorunized.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_off0001072a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1072A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011f3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F3C 17000 bytes
SHA-256: 8d1770634aa950d3607101f843c0a48c29bb14a1cecf5607693eb3eca8d8a45c
font_02_sfnt_off00014ba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BA7 10080 bytes
SHA-256: f77a46418b39351868ef8f2f6378e57d45802c6e608c2c7941927e454339d352

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