Malicious PDF — malware analysis report

Static analysis result for SHA-256 8da4795b698cdff3…

MALICIOUS

PDF

151.6 KB Created: 2021-03-15 21:57:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60fec9ce687307caa6a4a21bf31b3c6d SHA-1: d89ad22d92aabe1d145fe45a2f3c6de7c664ba2e SHA-256: 8da4795b698cdff3adc3218530148aa843fb760fd2132ffdc48f347d4f573007
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains text related to 'Propositional logic proof examples' and is associated with an external URI pointing to 'https://botokaw.ru/strik'. This suggests a phishing or social engineering attack where the user is tricked into visiting a malicious site under the guise of legitimate content. No scripts were extracted, but the presence of embedded URLs and the overall detection profile strongly suggest a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 4

  • 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://botokaw.ru/strik?utm_term=propositional+logic+proof+examples
    • http://sodaapp.pro/why_did_the_cow_keep_jumping_over_the_barrel1967v.pdf
    • https://kodidenub.weebly.com/uploads/1/3/4/3/134328035/d485316.pdf
    • http://microbladingeyebrowsdallastx.com/jalawuram49dxd.pdf
    • http://buwubaled.mywebcommunity.org/compound_adjectives_worksheets_with_answers.pdf
    • https://komomagifagele.weebly.com/uploads/1/3/4/7/134705279/412cc3.pdf
    • http://mscredit.info/the_divine_comedy_by_dante_alighieri_translated_by_john_ciardidtazd.pdf
    • http://mowogaw.mypressonline.com/disha_publication_bank_po_books_free_download.pdf
    • http://domavera.ru/transition_words_for_body_paragraphs_in_an_essay7jr1k.pdf
    • http://rebelliona.online/ragitamef9fme.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7fa3d836-deb5-4298-af08-9f8a90d0071c/how_to_replace_the_delta_1700_series_shower_cartridge.pdf
    • https://uploads.strikinglycdn.com/files/7122e651-8fc6-466c-bdec-6f1a124922f5/wifudodedabureramumagi.pdf
    • https://uploads.strikinglycdn.com/files/744fff8f-4a8c-4ba5-9863-668b7dd38000/rules_for_cribbage_for_beginners.pdf
    • http://bopewexe.onlinewebshop.net/storyboard_template_a3.pdf
    • http://mibopunufe.epizy.com/crecimiento_bacteriano_fases.pdf
    • https://uploads.strikinglycdn.com/files/136bb38c-5167-44fc-8ab3-9c5ecc0774f1/international_journal_of_research_in_health_sciences.pdf
    • https://uploads.strikinglycdn.com/files/69996ccf-27c0-4f83-b38e-97a38632ac1f/do_long_haired_mini_dachshunds_shed.pdf
    • https://uploads.strikinglycdn.com/files/948d8db9-28af-4a23-9523-f0f008cb3286/vajumorojex.pdf
    • https://uploads.strikinglycdn.com/files/b3f37bc4-afdc-49fd-af64-9b03d5b374ba/41126798576.pdf
    • https://uploads.strikinglycdn.com/files/7a5d7aad-cd06-43a0-9b32-58dfffbfa0b8/jufozaxazudebe.pdf
    • https://uploads.strikinglycdn.com/files/41ccc03d-5caa-40fe-b389-6798454e86c8/do_jehovah_witness_sing_hymns.pdf
    • http://mujigivufutufu.rf.gd/94643371599.pdf
    • http://kivarutumo.myartsonline.com/autocad_electrical_free_download_for_students.pdf
    • https://uploads.strikinglycdn.com/files/e88b706e-971b-4ffd-bdd5-f0d2b577afe3/64243154750.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001f906.bin
7c3f81f1015ed718a9e390dfd926219b22ed25c49299d325663fd4761fc994e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F906 5404 bytes
font_01_sfnt_off00020b62.bin
f3718a9451f9f9695e276d4297a8b3f6f851455c95d41f6917a6609f1df36f4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x20B62 12712 bytes
font_02_sfnt_off000236f8.bin
e327344e4988f7686728cad14563be4d7454dc838ed2a07924deb32888957326		 pdf-font-stream PDF embedded font (sfnt) at offset 0x236F8 17216 bytes

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