Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7cae0763f85782f…

MALICIOUS

PDF

76.8 KB Created: 2021-03-19 12:11:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06a14242c6dbd6eb5b4910c187b52faa SHA-1: eef2f56a6d969094e5dedd4961398c17514e8f36 SHA-256: c7cae0763f85782f32861ae847bf2622faf30f44f9914eff924ffd244487b857
96 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains an embedded URI pointing to 'soxebez.ru', which is likely used to host a phishing page or download a second-stage payload. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest an attempt to exploit the user via a malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/123?utm_term=vbscript+date+format+milliseconds
    • https://cdn-cms.f-static.net/uploads/4409840/normal_5fd2d2e42425d.pdf
    • http://wedasuf.getenjoyment.net/what_is_positive_on_jumper_cables.pdf
    • https://cdn-cms.f-static.net/uploads/4412388/normal_603184808418e.pdf
    • https://cdn-cms.f-static.net/uploads/4475406/normal_60340acb7e778.pdf
    • http://newoxoxi.mywebcommunity.org/5142021302.pdf
    • https://cdn.sqhk.co/nizivatitogu/f6xigJI/favinepinomagojenatinebo.pdf
    • https://static.s123-cdn-static.com/uploads/4467586/normal_5fe0390780589.pdf
    • http://fakurivevid.scienceontheweb.net/axolotl_cuento_completo.pdf
    • https://cdn-cms.f-static.net/uploads/4485589/normal_603fd366842ef.pdf
    • https://cdn.sqhk.co/pujimuxuja/fKMKh6c/mulejiweladapug.pdf
    • https://cdn.sqhk.co/figakeves/zijR6mk/70972100988.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bigapenegig.atwebpages.com/tivedonijofinobu.pdf
    • https://uploads.strikinglycdn.com/files/1674718a-0c28-4e6f-83df-c5314e51f72e/top_tom_clancy_games_ps4.pdf
    • https://uploads.strikinglycdn.com/files/2e5dfb96-0af1-45fb-bbbd-337c109fcd42/bubinam.pdf
    • https://s3.amazonaws.com/xijalovelokolep/java_programming_challenges_answers.pdf
    • https://s3.amazonaws.com/meludav/dog_vaccination_card_template.pdf
    • https://uploads.strikinglycdn.com/files/2beb737d-17d4-4353-88ff-66bae5085ced/82384482381.pdf
    • https://uploads.strikinglycdn.com/files/af180810-2210-486d-a12d-4fc0c9f6efff/solve_for_happy_similar_books.pdf
    • https://uploads.strikinglycdn.com/files/c36ec00f-f22e-4db9-a98b-bbe46f75044b/how_to_restart_ipod_shuffle_4th_generation.pdf
    • http://bavufupuvamopaf.atwebpages.com/new_technology_in_agriculture.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_off0000ebc3.bin
718a33b4d01acbbbb2f215964297af1cb31aea8a94b2b9291cd66122d1f948da
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC3 5408 bytes
font_01_sfnt_off0000fe12.bin
3fc102f22068379d50a0cde4b06519db573bc8a8211bb113f7cead556cd85fb7
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE12 11612 bytes