Malicious PDF — malware analysis report

Static analysis result for SHA-256 558e1cc214bcb671…

MALICIOUS

PDF

70.3 KB Created: 2020-11-25 21:12:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87e25d8e96f0e7bfd79bfbdc0ea53723 SHA-1: 1cd694ad6f99391906098c55558de2501543016e SHA-256: 558e1cc214bcb67175916c6b90e10040972f5561e3dd2f0ba26cba896790306c
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as 'Pdf.Phishing.Trojan'. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be directing the user to a phishing site, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/aws?utm_term=serie+after+dark+livro+4+pdf
    • https://cdn-cms.f-static.net/uploads/4473322/normal_5fa6cfac3a02b.pdf
    • https://cdn-cms.f-static.net/uploads/4475995/normal_5fa906bcd72cf.pdf
    • https://cdn-cms.f-static.net/uploads/4379477/normal_5f8bcdad1c0ec.pdf
    • https://cdn-cms.f-static.net/uploads/4408583/normal_5fbb7a0c0c106.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/272700f0-ab16-40e5-9f95-ea6756eeb5e5/96328532668.pdf
    • https://uploads.strikinglycdn.com/files/416df210-1c38-4573-bae6-b997a4109a73/fesaba.pdf
    • https://uploads.strikinglycdn.com/files/0d45a58a-b281-48a2-b80f-cdbc7fc44b0e/wealth_trigger_360.pdf
    • https://uploads.strikinglycdn.com/files/9888c4bc-dddb-4478-8f4e-b3e02fc1d78e/vuvuwabenoziwa.pdf
    • https://uploads.strikinglycdn.com/files/1c26dc11-dc75-417b-96e0-1b5cab68922a/larry_niven_ringworld_engineers.pdf
    • https://s3.amazonaws.com/sevoga/basic_electrical_engineering_book_in_hindi_by_vk_mehta.pdf
    • https://s3.amazonaws.com/sanekufiwumafo/watch_online_catching_fire_free.pdf
    • https://s3.amazonaws.com/bubisifapagefe/cuando_te_encuentre_libro.pdf
    • https://uploads.strikinglycdn.com/files/5220545d-2cbf-4bc5-ac58-056368e3e75c/pekisegiranomisemozil.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_off0000d547.bin
a2664ba08a7d9558fae130bef4019dfd9037752d99e2a752f29b8dc1d3c2c1cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD547 5172 bytes
font_01_sfnt_off0000e704.bin
5fedf603e98dca803e7df7003ec461fe9f58838a2dd72b929bd7f3f2fa484a0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE704 10376 bytes

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