Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c831736c229f7d6…

MALICIOUS

PDF

89.9 KB Created: 2021-08-20 07:48:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 6955fa337bbb431f6c0b4542cd70f64e SHA-1: 00c0aa3b4c10c96b965acd78721554287d3c66a7 SHA-256: 6c831736c229f7d6eee41796081e58e8f5e4484317bd18f4d52c5d624f84490a
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 WordPress sites or are structured as link farms on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or directing users to malicious content. The primary attack pattern involves luring users through these links, potentially as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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 http://mjsolankifoundation.com/fck/imagesfile/86235295486.pdf In PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/821eb08435757de9bf306595c9f03867/27436326265.pdfIn PDF document text
    • https://vigiweb.cl/dinamicos/files/file/vonifobazavigobuga.pdfIn PDF document text
    • https://georeno.ca/userfiles/files/49774522335.pdfIn PDF document text
    • https://everywheregenes.com/uploadfile/qu26_qu106_com/files/radavubakavukagipabavo.pdfIn PDF document text
    • http://bugskin.org/userfiles/file/zanavupanivatiserinobakan.pdfIn PDF document text
    • http://suacuacuonthanhhoa.com/upload/files/55511781434.pdfIn PDF document text
    • http://immobiliareborghi.com/userfiles/files/nimimebu.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c864541c826---xiwapuziwarapezowokoxi.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/dafuwusulin.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/16076e7f157f7c---14877945888.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8168a71fe5---39795053552.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16108a1e8766fe---69115680753.pdfIn PDF document text
    • http://quadocdao.vn/uploads/files/26844986770.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/ec3ba6afd12008bb69daaec66230f0ef/dimawanebazepixedisa.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607032bc12b76---13597658579.pdfIn PDF document text
    • https://o-dance.com/upload/files/92016449501.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/t62fdi8lvrli1dc5bunv8tnql5/pelemudobewo.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/c989e830de1ac22f690945f3f739f18f/32739421264.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/12474488924.pdfIn PDF document text
    • http://ordineveterinarivenezia.eu/userfiles/files/74061212820.pdfIn PDF document text
    • http://baodieptailor.com/uploads/2021-08-10/images/files/lozexewewotuzebitemenosuj.pdfIn PDF document text
    • http://whippets-au.com/clients/7/7f/7f5032e15db821a993a8146895416847/File/41174274477.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=elan+definition+wikipediaPDF 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_off0000fda3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000115ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115BA 10384 bytes
SHA-256: 98c8a3e6d73ce7e9807a8a18b0c50401040d0d8f92c094545ff31a2187d2129e
font_02_sfnt_off00012d4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D4E 17120 bytes
SHA-256: 7c523e3f7e5ececb8e720909dcf70d460180a525e49f2b4a198cc5e08ccb49e8

Open this report in the interactive analyzer, or submit your own file for analysis.