Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d6e6b827d494484…

MALICIOUS

PDF

78.7 KB Created: 2021-09-24 11:20:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: bae42804b1bc44484695871690b44ce7 SHA-1: dc4906790ef47f2bb3ac5544706a5de5069894ef SHA-256: 3d6e6b827d49448445a94e741f7181364c9c4e75036f05b56a99bcb466b05fd4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting. The presence of external URI heuristics and the ML classifier's high confidence score indicate a strong likelihood of malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://urbanlivin.lu/userfiles/files/6522067227.pdf In PDF document text
    • http://athaj2.specialty-match.com/upload/files/22133958696.pdfIn PDF document text
    • http://vitacanes.com/uploads/files/mekakarawowe.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/10a5e78634c5677d014dd0f03fca4ad1/xoxasaxanisip.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/t8a0d3h5dsaf0kphniai4a4pkd/diruzigefore.pdfIn PDF document text
    • http://bbdecontra.com/userfiles/files/bataju.pdfIn PDF document text
    • http://topup-fight.com/ckfinder/userfiles/files/pewesobomodepu.pdfIn PDF document text
    • http://ensky-chemical.com/upload/files/54412447014.pdfIn PDF document text
    • http://pressvaluation.net/FCKeditor/editor/filemanager/connectors/userfiles/file/tuvowow.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/nijekukanobifetojazumosub.pdfIn PDF document text
    • http://haisushitogo.com/uploads/files/29925092499.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/52035099094.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/muremodikexepiwugozibiru.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/lisijow.pdfIn PDF document text
    • https://stmarys-perthamboy.com/upload/File/foviragovakenakob.pdfIn PDF document text
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/32905980397.pdfIn PDF document text
    • http://speaklifeiamgreatness.com/files/files/5545916642.pdfIn PDF document text
    • http://vekosgroup.ru/userfiles/file/24406863256.pdfIn PDF document text
    • https://otomatcilarmetal.com/otomat/upload/files/moramewi.pdfIn PDF document text
    • http://asu78.ru/userfiles/file/sekuzusodadutomuronenukos.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bc370493a809785df97839c5487366e8/gesisuwiwor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=gta+lcs+cheats+android+apkPDF 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_off0000d260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD260 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA77 10740 bytes
SHA-256: 5eae1003e0e9fc7d7da1f6f2f4ffb48c962a4ce689e0bcb2ff32101977dc5e67
font_02_sfnt_off00010318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10318 16396 bytes
SHA-256: 272f0d91eb153fc9bf231cd1cbc315a0a1a2f02edd821c24895d02f40c4f297b