Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce19b0fe3d46ba4c…

MALICIOUS

PDF

73.0 KB Created: 2021-09-21 02:17:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a779f146fd3e82642cf5c25f08d276de SHA-1: 8216fa27322a57aef47f5bf9148b7065e33e5eb9 SHA-256: ce19b0fe3d46ba4c2a4cda04e0c6044c23797ad091e165403629f467a3897830
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links pointing to potentially compromised WordPress uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the nature of the heuristics indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

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://infrive.ru/uplcv?utm_term=tango+for+iphone+and+android PDF link annotation
    • http://kommunikator.nu/demo/userfiles/file///97887179149.pdfIn PDF document text
    • http://thechitay.com/uploads/userfiles/file/renexiwapusukin.pdfIn PDF document text
    • https://ceccarmehedinti.ro/userfiles/file/nukawoveniwifova.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/rg6msec9lrju0jh8245cmaoko4/15811895339.pdfIn PDF document text
    • http://brukikostka.pl/uploads/page/file/xevudorowajediti.pdfIn PDF document text
    • http://disonde.com/filespath/files/20210917125203.pdfIn PDF document text
    • http://www.clc-engineering.com/siteuploads/editorimg/file/fividub.pdfIn PDF document text
    • http://shanghaiqingchen.com/upload/files/2168110372.pdfIn PDF document text
    • http://d-innovation.com/upload/files/vapowafifaruleforaka.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613df716972f0---wadiwotozozafuwodakomamuz.pdfIn PDF document text
    • http://jfac.kr/ckfinder/userfiles/files/tinosizomizikesuwegafew.pdfIn PDF document text
    • https://cvssteelex.com/ckfinder/userfiles/files/jinomebejanapigopu.pdfIn PDF document text
    • https://blsautomation.com/ckfinder/userfiles/files/getekimofuvotag.pdfIn PDF document text
    • http://radyoislam.com/resimler/files/muzamigaxu.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/vudazokazuxafagaluvaz.pdfIn PDF document text
    • http://umffz21.ru/admin/ckfinder/userfiles/files/89622266851.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/d056667a95095e001c37bb8879358f54/rejatafedemixusulafi.pdfIn PDF document text
    • https://www.tocbirsen.org.tr/ckfinder/userfiles/files/kaxozomemesavuponuwizud.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/161427a7986d41---lizelurujupoxovokari.pdfIn PDF document text
    • http://happy-land.hu/editor_up/nuzukubi.pdfIn PDF document text
    • https://sluganarodu.org/userfiles/files/potawukavap.pdfIn PDF document text
    • http://srmtteaparty.com/uploads/files/202109030115411009.pdfIn PDF document text
    • http://mayinmaunhat.com/upload/files/kusizapunabudelerateki.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/r8lg6pujs1n33fv31pb9b6o91m/wexakiralakopima.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613583d9e270d---93931530322.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143e56985bec---kefabemipevafir.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_off0000be07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE07 10428 bytes
SHA-256: 4555dc6c5095f82d0158b8ce5effa0566ff1dff6f834a091c063e8c8d3c81b96
font_01_sfnt_off0000d551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD551 16008 bytes
SHA-256: fd05f5b6f52592702bb38cb1ef0b68b20aa2fe9ed731d6815ff2a8bbd3ca5c94
font_02_sfnt_off0000fe41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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