Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e8f04a35cd31da7…

MALICIOUS

PDF

80.0 KB Created: 2021-09-07 17:09:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6e295806cd8fcc1986563438d24abcd2 SHA-1: f8a21b1167509d4da8ad940791d7d793f47706cf SHA-256: 0e8f04a35cd31da71a40a8f68991b9dfdc29f1dbe9f5af388e0e677fbb31068b
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm with numerous URLs pointing to various domains, many of which appear to be compromised WordPress upload directories or disposable hosting. The primary purpose seems to be redirecting users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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=eachine+e58+manual+pdf+espa%C3%B1ol PDF link annotation
    • http://fujiya-burbank.com/uploads/files/xupelazugowuxaw.pdfIn PDF document text
    • https://m-isc.com/userfiles/file/gevava.pdfIn PDF document text
    • https://rajatotogroup4.com/contents/files/59248440184.pdfIn PDF document text
    • https://s-serviss.lv/userfiles/file/nibetilixelimexikebepo.pdfIn PDF document text
    • https://dailyhondaotomientay.com/upload/files/wumuj.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/714331839656287ed5e72d1b1a6cfb23/37468084415.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/rumikafotodowo.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/3d6041eea0c33499e0beae8ad7947bb9/fakewaroxolojugidosurilud.pdfIn PDF document text
    • http://ngnjl.com/userfiles/files/sawola.pdfIn PDF document text
    • http://stromzeleny.cz/file/zimifasezokekimoditiv.pdfIn PDF document text
    • http://www.puhito.hu/uploads/saronedonitewiwuruvoze.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a92808454c9---gusudawalijekazigaxixe.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609037c47d34a---66408836323.pdfIn PDF document text
    • https://harrisitalia.it/uploads/file/tabipajumun.pdfIn PDF document text
    • http://tupnate.com/ckfinder/userfiles/files/30893983363.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/situro.pdfIn PDF document text
    • http://esistore.de/userfiles/file/48273162626.pdfIn PDF document text
    • http://nabisori.com/userfiles/file/lovobazepitetanixito.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160dd7bb85fd08---9891047250.pdfIn PDF document text
    • http://klenderbio.com/upload/files/jozofujowidiniwaguzozowe.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a565d3957c6---falijukifototodusi.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/7e34493e5e1629865c4a53f5a4240f63/46410721683.pdfIn PDF document text
    • https://egf.tw/test2/images/file/suzinamedipasaroxivi.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c31f2906861---74232753751.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072e90ef38c2---gesalapoxipomuruvamaru.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe1b57cf93---lumudugijalekimesimu.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_off0000ce2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE2D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e63f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63F 18408 bytes
SHA-256: 8865b33ad8695bda40530168a1cc017e31b876ff4760aab93a14b53ea1e42bdf
font_02_sfnt_off000115f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F4 11320 bytes
SHA-256: 17e9e93b563b4c07dcd7a196d598741525f17b7ff60a0ce65cdc5d2841790ea5

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