Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d6094ca10854c94…

MALICIOUS

PDF

68.9 KB Created: 2021-09-20 09:24:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 77f994ce7bed4b18f594234d934529b3 SHA-1: 84b29c9f944e1e4365c14b2c66e19df09bb3835a SHA-256: 1d6094ca10854c94e4e497c1c93aff84f2f9910dd0896b5b2d24d7b601a6e25c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and numerous embedded URLs point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://garglob.ru/uplcv?utm_term=how+long+is+leftover+cooked+chicken+good+for PDF link annotation
    • http://nikolalepojevic5.com/multimedia/file/97223664755.pdfIn PDF document text
    • https://www.eos.org.eg/ckfinder/userfiles/files/56010576786.pdfIn PDF document text
    • https://nasikampung.info/contents/files/22899215477.pdfIn PDF document text
    • http://midospa.com/upload/files/wikes.pdfIn PDF document text
    • http://fiorenzuolatrack.it/userfiles/files/ronumobaxelab.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/fadetomonobigaximanikelot.pdfIn PDF document text
    • http://dotbamboo.com/file_media/file_image/file/fobuvuvaxoxugatidaperiver.pdfIn PDF document text
    • http://www.sas.edu.mn/ckfinder/userfiles/files/40415340236.pdfIn PDF document text
    • http://splogservice.ru/content/file/palusatesivujowokevixebex.pdfIn PDF document text
    • http://millecolori.it/images/file/90679443437.pdfIn PDF document text
    • http://le-nora.com/userfiles/file/pedibagijijexizaxanilur.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/673fe45a67f023276fc75957a7297f94/7010109282.pdfIn PDF document text
    • http://lovec.bg/root/ckfinder/userfiles/files/83216384745.pdfIn PDF document text
    • http://cl-metalparts.com/d/files/maturazevasepa.pdfIn PDF document text
    • https://thediamangroup.com/_images/files/70637062354.pdfIn PDF document text
    • https://castel.ro/userfiles/file/90062785861.pdfIn PDF document text
    • https://ocw.tw/uploads/files/91588740694.pdfIn PDF document text
    • https://psg66.ru/admin/ckfinder/userfiles/files/93481020178.pdfIn PDF document text
    • https://aramlasmerok.hu/uploads/file/74604387843.pdfIn PDF document text
    • http://slxiang.com/v15/Upload/file/2021971530173550.pdfIn PDF document text
    • http://owop.challengersports.com/ckfinder/userfiles/files/vokimirepupowomipu.pdfIn PDF document text
    • http://snp-ent.com/files/fckeditor/file/1674183181613df03133cfd.pdfIn PDF document text
    • https://simpangkanan.com/contents/files/89000086993.pdfIn PDF document text
    • https://milosislandrooms.gr/userfiles/file/wezawigapuxosasu.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613e02351d8f8---zutizigoxolekux.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_off0000b1a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1A4 10828 bytes
SHA-256: 669a24cc7819b449b855a69bd96416a4ab4e485b906bf4fec7f40141f70531e6
font_01_sfnt_off0000ca64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA64 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE276 14272 bytes
SHA-256: 1a46df13ec2ae41bb9eae4425ecd29e789e7483c9aa77b5f788161af1076105d

Open this report in the interactive analyzer, or submit your own file for analysis.