Malicious PDF — malware analysis report

Static analysis result for SHA-256 06c2c3d4ece6fbde…

MALICIOUS

PDF

77.8 KB Created: 2021-09-16 17:22:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1d1776cc96497719590ba09d70fa1493 SHA-1: 96c1078c069021874da06bc6ed056872d1a1ac99 SHA-256: 06c2c3d4ece6fbde34bb9f279214f15f74db80b386879de1ac6ba1884d6d3441
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to various domains, suggesting a phishing or link-farming operation. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the attack pattern of luring users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://catamma.ru/uplcv?utm_term=download+albanian+language+for+android PDF link annotation
    • http://jarosi.hu/files/file/lujabebagosipopajig.pdfIn PDF document text
    • https://www.abrasco.org.br/ckfinder/userfiles/files/vuvupusisunetomisadomazas.pdfIn PDF document text
    • http://galeriejacqueselbaz.com/userfiles/file/42054825320.pdfIn PDF document text
    • https://dla-pracownika.pl/pliki_user/File/30656268860.pdfIn PDF document text
    • http://7m-shop.com/userfiles/file/14545210107.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea8d06e90a---pevakokene.pdfIn PDF document text
    • http://heizler.hu/files/file/56298726938.pdfIn PDF document text
    • https://almuhja.ps/ckfinder/userfiles/files/84992717275.pdfIn PDF document text
    • https://franchisefarm.franchiseharbor.com/files/files/dajagofowufapibuxe.pdfIn PDF document text
    • https://laatuwhuisweerstralen.nl/upload/file/jatemijinofig.pdfIn PDF document text
    • http://landroverbh.com/ckfinder/userfiles/files/xidin.pdfIn PDF document text
    • https://lwim-ouargla.dz/ar/files/rafanugijejosaza.pdfIn PDF document text
    • http://umrllc.com/userfiles/files/17959460816.pdfIn PDF document text
    • https://kontiko.com/ktkweb3/images/upload/files/zibasowavulamapuvubopa.pdfIn PDF document text
    • http://tnslib.net/userfiles/files/juzesipunezixumavapaxiz.pdfIn PDF document text
    • http://mertcelikkapi.com/userfiles/file/satisiboraxezojulebezuk.pdfIn PDF document text
    • http://www.prunay-en-yvelines.fr/ckfinder/userfiles/files/12270750362.pdfIn PDF document text
    • http://dailymaydemtien.com/userfiles/files/13532533396.pdfIn PDF document text
    • http://festacreativita.org/userfiles/file/kifinoteg.pdfIn PDF document text
    • http://fobas.cz/userfiles/file/33758275941.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/bixusejumazudogen.pdfIn PDF document text
    • https://wronba.pl/uploads/wysiwyg/file/ladotemibuvawo.pdfIn PDF document text
    • http://print-printonline.com/ckfinder/userfiles/files/99869339791.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/99cb2bceb7937bd103ae546f1ea59daf/mivetunezibomamesogikeki.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_off0000cc1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC1C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e42e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE42E 17200 bytes
SHA-256: 8584302a9e22c04b0a4580be13d22241e15a0c88e16b21a4c93232d13caf9268
font_02_sfnt_off0001112b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1112B 10592 bytes
SHA-256: 416309be47c7d196cf2718e96b5b60ded42db13146ac9a71f0ff34edac9c314a