Malicious PDF — malware analysis report

Static analysis result for SHA-256 e89637f83fc72982…

MALICIOUS

PDF

83.4 KB Created: 2021-09-06 00:07:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: fe205ef4145da2c863248f2c9831d1d5 SHA-1: d11ff55482414f2fe4a73ac5aee7178eccf6e2c2 SHA-256: e89637f83fc72982f2492c66ee8576f04e50b095410e39f2365b47dbc4825cdd
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and a machine learning classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to various domains, some of which are hosted on compromised CMS uploads or disposable hosting. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://dsm-trhs68.com/clients/8/81/818e764d3414495a915a5f66638dc9bf/File/91860951552.pdf In PDF document text
    • http://zonwering-belgie.be/ckfinder/userfiles/files/29909786097.pdfIn PDF document text
    • http://sattosushi.com/uploads/files/38077327900.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a92175b989---vijewigib.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6cbe343e2---33829281721.pdfIn PDF document text
    • https://rachelrom.com/rescontent/file/lizefiragumabajax.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607c705de9bf9---modaliwewanizetixujutadaz.pdfIn PDF document text
    • http://www.abcklima.hu//data/editorfile/jawopuwezek.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/95581becaeb93ff0010c790167d069ab/jilid.pdfIn PDF document text
    • http://xn--o79av69abka850ab6c.com/upload/file/202108201402019371.pdfIn PDF document text
    • https://www.hsbofmn.com/ckfinder/userfiles/files/52568035692.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/89344984978.pdfIn PDF document text
    • https://www.profiemg.cz/upload/ck/files/71709372817.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca955e3f93---8348153713.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1606e1e326f885---mexusasanugevovaz.pdfIn PDF document text
    • https://cpsguffanti.it/uploads/file/sibobasegexatuwaboboxo.pdfIn PDF document text
    • http://czpohledavky.cz/userfiles/files/49331689096.pdfIn PDF document text
    • http://tfe-design.dk/userfiles/file/92602382883.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/e10ab6f0858146ed79237175e88c25c4/91739000887.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/73407166990.pdfIn PDF document text
    • http://candybeauty.vn/upload/files/14384306296.pdfIn PDF document text
    • http://kfnmsz.com/upfolder/e/files/20210702180744.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a87dbb2d420---50871399057.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/009853ce01e62ec7c7678b97616a9591/xokasexitigakebibakop.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/e441219023ec60ae3b9bb5120dd0f5ab/dikiwetuxogaguwisorano.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=demanda+de+amparo+directo+en+materia+civil+pdfPDF 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_off0000dc29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC29 10680 bytes
SHA-256: 1153cb3b4811d906d2ada0d1ae5ed2ba757e9d641e835687457f53b937d84748
font_01_sfnt_off0000f496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF496 19988 bytes
SHA-256: cf6c4d99ac4f6f43dad911e967b0b622784a7ac74a6d84900c01201d74e5be4c
font_02_sfnt_off000127af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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