Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd42c6417792be65…

MALICIOUS

PDF

74.9 KB Created: 2021-09-22 13:51:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: eb98067ecba4beaaad98cff195dca58f SHA-1: f6ffda20fb226c7472fc2c7fde16b928dd4f2917 SHA-256: fd42c6417792be65b5bf0a8a33b4c6ef273878b6640b0dce67e9a491acbae60a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous external URIs, with one specifically pointing to a URL containing 'uplcv' and a search term, suggesting a phishing or exploit delivery mechanism. The PDF's structure and the presence of many links to disposable hosting further support its role as a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=new+gangster+apk PDF link annotation
    • http://timandlor.com/userfiles/file/61147914788.pdfIn PDF document text
    • http://addon-colsman.somantec.net/ckfinder/userfiles/files/vumejix.pdfIn PDF document text
    • http://kepco-group.com/uploaded_files/userfiles/files/murejawu.pdfIn PDF document text
    • http://srilakshmienterprises.net/uploads/6954540364.pdfIn PDF document text
    • http://jrecchina.com/ckeditor/ckfinder/userfiles/files/puvozakolegofumirel.pdfIn PDF document text
    • http://michael-dhom.com/webseiten/file/34264535454.pdfIn PDF document text
    • https://a1-recruitment.fr/v2011/Files/fck_upload/file/89521636462.pdfIn PDF document text
    • http://fittbikese.hu/files/file/19495004545.pdfIn PDF document text
    • https://pcetravel.com/files/file/sozeruz.pdfIn PDF document text
    • https://aokman-drive.com/d/files/54505999134.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/d57d9090d0f1b3e9b85b0db12141462c/43238444247.pdfIn PDF document text
    • https://kurek-rowery.pl/user_pict/file/72867437517.pdfIn PDF document text
    • http://goang-hann.com/uploads/files/202109090129322055.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/vojedumatirulufuvu.pdfIn PDF document text
    • http://xn--80aagkbrca3apkgkee0a1bi.xn--p1ai/ckfinder/userfiles/files/61166748746.pdfIn PDF document text
    • https://grafconsulting.pl/Upload/file/33853087602.pdfIn PDF document text
    • http://energywork.pl/userfiles/file/vurejawekonelure.pdfIn PDF document text
    • https://mailing.crpm.ch/ck/ckfinder/userfiles/files/vivijezujaluwunugobixofo.pdfIn PDF document text
    • http://lisaarkinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/luvasivozezaze.pdfIn PDF document text
    • http://dijladentalcenter-qa.com/userfiles/file/benibuwegesufi.pdfIn PDF document text
    • http://molenat-energies.fr/molenat.com/images/editor/file/doxizironep.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_off0000b950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB950 10324 bytes
SHA-256: 6cc7172df640d054417e89a7e64c91f0dac78cf33270954c1329d2fd3ee035f8
font_01_sfnt_off0000d0d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D2 20892 bytes
SHA-256: 3db2a60dbb8d8ee540be6c8be161ace4d307718f58557afa747d444367ded118
font_02_sfnt_off000105e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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