Malicious PDF — malware analysis report

Static analysis result for SHA-256 7096ff02adf69bdc…

MALICIOUS

PDF

82.3 KB Created: 2021-09-05 13:59:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: fdb6fb226aac992e0a93608dabfd735f SHA-1: f5f15d79bd485849bfba5f165217cc4e60cce4c1 SHA-256: 7096ff02adf69bdce6fc05ed0af8ef8d83257675e0cbde5f86c7e6ad1bc4e4e1
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristics indicate it functions as a link farm, directing users to multiple compromised websites and disposable hosting domains. The embedded URLs suggest an attempt to lure users to external sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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=attestato+di+prestazione+energetica+esempio+pdf PDF link annotation
    • http://jucal.es/images/file/tibazabozijubibuvoge.pdfIn PDF document text
    • https://olterus.net/contents//files/sogapepew.pdfIn PDF document text
    • http://www.kymkarajok.net/tiedostot/files/87547186580.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/1j6jd1s8ntn73jcsuq8h718q8g/midaja.pdfIn PDF document text
    • http://quiltingacademy.com/fckeditor/userfiles/file/88559704515.pdfIn PDF document text
    • https://www.babetravelling.com/ckfinder/userfiles2/files/78957379105.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/3l8p7ihgti8j26efcej7r8490i/zupafurelukulejiwitetub.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/b54efd37d368b04781ceba670d9981cd/lozudukonokujopuguget.pdfIn PDF document text
    • http://levne-pohary.cz/UserFiles/File/70234052691.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b41e42394a7---38018116269.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/f4094f8010535ab4d1aa7dbe510f9b37/46614311838.pdfIn PDF document text
    • http://abbwingslynnhaven.com/uploads/files/vigisodazi.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/b79190d23bf2c278698c20ab697b8c3a/77181978849.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/wijukatiso.pdfIn PDF document text
    • http://esistore.be/userfiles/file/80225386618.pdfIn PDF document text
    • http://esenkardeslerinsaat.com/resimlerfiles/fobanagukudexijorube.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608caf507c25b---17813777740.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/16121a971a48f3---68046689559.pdfIn PDF document text
    • https://tectrongim.com/uploads/files/gapotivejudugelunekodu.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608941d683488---23148635196.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/242306c21885e3c85714d3bcc7b721db/40609930488.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/mbbqa0llqg0o2smek98fgq442u/watuwekisibo.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_off0000dee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE6 10960 bytes
SHA-256: 2a2afb681a8a1fb5f3af63ede7307c329601973acead3ee715ad66d8729e8019
font_01_sfnt_off0000f833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF833 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11045 16816 bytes
SHA-256: cbbe1461e0c1f07ecf757c88470e9b8eebd88163f35ff131067ff1a3c958dcec

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