Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ced10ca2b9faf9e…

MALICIOUS

PDF

61.3 KB Created: 2021-03-28 18:23:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 334442416a813d6f4d2d4b0ebfad14e8 SHA-1: 97fd6695676540c1efd8567902cccf528484644c SHA-256: 0ced10ca2b9faf9ea946f987946b54c46f932fe6eb4b2c1239e4ff3aed438f4d
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO poisoning tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded URLs are designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • 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://midufefew.ru/award?keyword=calices+renales+pdf
    • https://dipilewojariwu.weebly.com/uploads/1/3/2/8/132814651/mofularozes-difif-xetoziwu-wumojul.pdf
    • http://wubujonil.getenjoyment.net/sunbeam_heated_throw_problems.pdf
    • https://static.s123-cdn-static.com/uploads/4368956/normal_5fdfb06f890aa.pdf
    • https://cdn-cms.f-static.net/uploads/4370543/normal_6059bc59bc342.pdf
    • https://cdn-cms.f-static.net/uploads/4393785/normal_60357c3687ab9.pdf
    • http://pivolirarorip.mypressonline.com/machine_learning_vs_deep_learning_salary.pdf
    • https://lagomide.weebly.com/uploads/1/3/5/3/135304015/9403221.pdf
    • https://static.s123-cdn-static.com/uploads/4485165/normal_60052f5a8809a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://e966359d-176b-477a-9ad9-c314bea94227.filesusr.com/ugd/fa6f14_239254c0e994449ab92e15363b741700.pdf?index=true
    • https://b70645e9-42d7-44c6-80f2-f165c8819e8d.filesusr.com/ugd/3f1130_63e0de4ae7ba4ae89c3381393cf73b95.pdf?index=true
    • http://pesetunal.onlinewebshop.net/yamaha_keyboard_repairs_uk.pdf
    • http://zobuwijezad.onlinewebshop.net/90640396172.pdf
    • https://6d23287f-a15b-43b7-8d69-700c0e01f504.filesusr.com/ugd/185c00_655594010583439698cd5c0c7099cb47.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ea642bdf-8663-4cef-b95a-f013817402c1/jidivifurufaragika.pdf
    • http://vatonafikokex.atwebpages.com/vivienda_social._arquitectura_contempornea.pdf
    • http://fikelamizogu.myartsonline.com/45712389174.pdf
    • http://saluwagasa.onlinewebshop.net/declaration_of_income_assets_and_liabilities_form.pdf
    • https://18b09f4e-de4d-4c1b-9fe6-be55c63b1c00.filesusr.com/ugd/cd81e9_e00524dfd65945b7b2e470dec0e1af05.pdf?index=true
    • https://fb075467-9d00-46c6-93ac-2b777f5e584b.filesusr.com/ugd/8bcd66_33f006cb5b024c6daecdc2a6350ba192.pdf?index=true
    • https://uploads.strikinglycdn.com/files/fb02389c-750d-44e9-8f30-4d6e7628b6d3/2305076596.pdf
    • https://uploads.strikinglycdn.com/files/ae0741e4-c6b7-45ec-a269-b452c6ed8b7f/pioneer_ddj_sx2_price_in_sri_lanka.pdf
    • http://bajupigirosinaf.atwebpages.com/bursary_application_form_2020.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e977.bin
712f6ef83825480472c8882b611fbf8728ac4817867d2119187c97e12b4185e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE977 4772 bytes

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