Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae27ad49f6befd68…

MALICIOUS

PDF

73.3 KB Created: 2021-06-18 05:07:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 54ca388751f362a3ed17c98623aa3b77 SHA-1: d418b03d70cb717134fdb4f96fa9900a375cedda SHA-256: ae27ad49f6befd68912020650ae81a5a89b985c63e2f4c2b73017e1343ab88bc
156 Risk Score

Malware Insights

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

The PDF file contains multiple links, many hosted on compromised WordPress sites, that are presented as a download for 'idm latest version'. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a link farm and compromised CMS upload links suggests an attempt to distribute malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/dvno0h13b0lk7j7cd9arj76lp4/lanuvuke.pdf In PDF document text
    • http://hillcresthigh1971.com/clients/9/9f/9fbf9047a6869172a982db6f42f05a9a/File/49063328304.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609a100c1103f---66963348782.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608759ed26b55---40974754383.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/h6o685fb3qarqqbgpck871nvmp/vutalatawetufebosa.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/rja9gblgs0qf6q2cs1c5t5qjil/85163367911.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/caa76c0bb649b8f3b5976e811c94b8c7/26244115505.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/ver1eijpmeubnl38f29hck113g/65961310939.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1a88ec57d---godajimegonajanefixowozo.pdfIn PDF document text
    • http://esthebel.de/userfiles/file/gowugepedupawinex.pdfIn PDF document text
    • https://condicionamentofisico.com/arquivos/file/sexubef.pdfIn PDF document text
    • https://dm288.rs/slicice/file/48009462248.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/39435493968.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/272383cd36ac8f72d0438a8498c29497/kuvefajaguvafe.pdfIn PDF document text
    • http://aligokdemir.com/resimler/files/18629655185.pdfIn PDF document text
    • https://mollis.rs//files/fugegobe.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/dcf679bed25f88d07b60610539b01c20/44491162820.pdfIn PDF document text
    • https://privatecambodiatour.com/userfiles/file/zezukum.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/6862634dfe29f618423d328184d534d0/maliw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=download+idm+latest+versionPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e07f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07F 5124 bytes
SHA-256: 1462595ec4ae9a81c3105c6d616402a207551346e5e00d1ea0553bb160ed8f1a
font_01_sfnt_off0000f1f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F3 11108 bytes
SHA-256: 9b4dfb01bb8e90ac41d04b3fe1bc5c7009b14bb8499414152a025b5822f4d4d3