Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b67ae8cab007a1f…

MALICIOUS

PDF

72.4 KB Created: 2021-03-25 15:09:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad30599606e8e084b9e1a580331c8259 SHA-1: a668cca89a416a21611d010f90acf06fe5573c04 SHA-256: 2b67ae8cab007a1f76f7a7ea4512b6b151d222041663959ddb12f067eb6d9391
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to potentially malicious domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The embedded URLs and the ClamAV detection suggest a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the presence of external links and the overall structure point towards a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • 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://mezovuduw.ru/wix?keyword=vernon+hills+high+school+calendar
    • http://mutuseki.22web.org/42791922459.pdf
    • https://cdn.sqhk.co/pabopimi/kTibihf/entry_level_infection_preventionist_resume.pdf
    • https://static.s123-cdn-static.com/uploads/4390663/normal_5ff1db42da69d.pdf
    • https://cdn.sqhk.co/nizufalagef/hdb3qfY/awesome_tanks_3_game.pdf
    • https://static.s123-cdn-static.com/uploads/4491451/normal_5fc9f9d764e8a.pdf
    • http://segorewadidet.iblogger.org/gepumatodul.pdf
    • https://cdn.sqhk.co/sezabaxo/iiijwjd/1119682349.pdf
    • https://cdn-cms.f-static.net/uploads/4459057/normal_6013190b473ad.pdf
    • https://static.s123-cdn-static.com/uploads/4404964/normal_5ff20b51bd37e.pdf
    • https://cdn.sqhk.co/zexatexa/2icKhiH/linear_function_equation_examples.pdf
    • https://cdn.sqhk.co/bisegepamitu/aRhe4HF/offroad_bus_simulator_3d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://b5b764bc-4fc6-48d7-9a4b-423a4d05f225.filesusr.com/ugd/3f2390_c61bff825a43438cb6da046f9fcddf18.pdf?index=true
    • http://jexaziled.rf.gd/88217133040.pdf
    • http://mukovixajetunex.epizy.com/poquito_mas_dinner_plate_calories.pdf
    • https://69b3109a-7cce-4514-9193-d2106d9976ab.filesusr.com/ugd/3c2969_7e1ff8225b9942cbac9e4ae9f41616f4.pdf?index=true
    • https://6997f972-013f-4c6f-ac95-4179ba17a557.filesusr.com/ugd/549e1a_df0c93109f8049de9a677eca01227384.pdf?index=true
    • https://64e1471b-64f8-4582-b127-b1692805dd1b.filesusr.com/ugd/507a3d_8adfb1ef0a784ed6a0a520d67778bf3d.pdf?index=true
    • https://3b87a2b8-2d13-4e6d-acc4-cbba57692a59.filesusr.com/ugd/50988c_3e2853f609f74680a414bb7ae004459e.pdf?index=true
    • https://49b821e7-ee7e-41b4-809b-d0417b8c1ddf.filesusr.com/ugd/927743_6198031d782c4b2782e877b988e84a33.pdf?index=true
    • https://2cc3dcad-61c1-4442-8662-ca5be7cd8672.filesusr.com/ugd/71b93f_1382ff62d40d461d942b9b0d61fc7764.pdf?index=true
    • https://fb4bdcd3-28a3-4206-a6c3-fb267f511c23.filesusr.com/ugd/0ad562_76ded6ea49de4673ab7b82b16b18aa3f.pdf?index=true
    • https://62abf401-5fc9-4991-ac00-cb6a0c8cf8ec.filesusr.com/ugd/e4ff69_096c7cb32b064cf5978436e32cb379f0.pdf?index=true
    • http://pupekulojam.epizy.com/kemuxozukifalubiz.pdf
    • https://203e7bc3-08d7-4ecc-a8df-f797e0d4a079.filesusr.com/ugd/d4579c_23558fb9d7db4253878c690b8192394b.pdf?index=true
    • http://bejopirobi.epizy.com/indices_worksheet_year_6.pdf
    • http://luwawabegopit.rf.gd/nolul.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de97.bin
35f0d684e8a066e4269430466f51a2f455459709f25b3548d901da6332bd52bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE97 5168 bytes
font_01_sfnt_off0000f028.bin
8493d78f90736307cf37f120d3df8835e71829616d27c3250671de15df58fc11		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF028 10624 bytes

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