Malicious PDF — malware analysis report

Static analysis result for SHA-256 383e93a826c95c8d…

MALICIOUS

PDF

83.9 KB Created: 2021-09-24 08:26:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7aa2fdc9e81531213899f7cf37b5cb9c SHA-1: d06a4efa2f958fbbb233a7002edd02d92cde573c SHA-256: 383e93a826c95c8dab9c7ac2b25700c887f2ec74c4afa9ac67531ff7997a1595
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. The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely used to redirect users to malicious sites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, suggesting a link farm designed for obfuscation or distribution. No scripts were extracted, but the overall structure and URL patterns are consistent with phishing or malware delivery campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://bandloc.com/FCKeditor/file/55159110858.pdf In PDF document text
    • https://bestcoloringpages.com/userfiles/file/mepapomuwi.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/usck371hrgdjh4t1c7o44ila64/31165832238.pdfIn PDF document text
    • https://rrrc.us/userfiles/file/65876676430.pdfIn PDF document text
    • https://festivaldelmaridaje.com/sgi_userfiles/userfiles/files/62052001825.pdfIn PDF document text
    • https://leosservices.com/userfiles/file/72397952747.pdfIn PDF document text
    • http://cuacuongiare.vn/upload/files/zipekazojegipog.pdfIn PDF document text
    • http://hoangle.vn/uploads/userfiles/file/49798364668.pdfIn PDF document text
    • http://carrasvilla.es/uploads/files/zonopelebogutuzalokufobiz.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/4630607162.pdfIn PDF document text
    • http://betheaskssd.com/flash/betheaskssd.com/file/8068038337.pdfIn PDF document text
    • https://kermiradiatoriai.lt/images/files/61869376835.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/d9fc062626d4a54ae5872e04e9458ad4/soseb.pdfIn PDF document text
    • http://lamay.de/userfiles/file/fepawalixufo.pdfIn PDF document text
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/52704111262.pdfIn PDF document text
    • http://gruppocreta.com/userfiles/files/98292046073.pdfIn PDF document text
    • https://cryptobasics.biz/uploads/files/94843770085.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/3374425840.pdfIn PDF document text
    • https://tapetcenter.ro/app/webroot/files/userfiles/files/sevojetosoxuxenabirebagot.pdfIn PDF document text
    • https://samsungdvmklima.com/upload/ckfinder/files/zujiwuxerexikofisa.pdfIn PDF document text
    • http://colorfusion.us/admin/images/file/71569001469.pdfIn PDF document text
    • http://snbedu.com/uploadfile/file///2021092307182939.pdfIn PDF document text
    • https://davidfauquemberg.com/home/fauquemb/david/bbdg_site/userfiles/file/xapebis.pdfIn PDF document text
    • https://vettercycles.ch/userfiles/files/56623014039.pdfIn PDF document text
    • http://retailpark.bg/uploads/wysiwyg/files/siberexepapewevawalum.pdfIn PDF document text
    • https://www.comperat-89.fr/ckfinder/userfiles/files/gufomoxibegomipuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=mi+a3+android+11+new+featuresPDF 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_off0000e0d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D1 10704 bytes
SHA-256: d7c2546cb8a405f24fa4cd5f6883f08f9f11c31f4fee6de18c94fb3bb338e016
font_01_sfnt_off0000f9a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A5 18376 bytes
SHA-256: a53e5ab1c484a7c0694cbbcb42fe7359a5e5ec25e3a398434ff51ab234a0118c
font_02_sfnt_off000129a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1