Malicious PDF — malware analysis report

Static analysis result for SHA-256 23791d6e6db9b6c9…

MALICIOUS

PDF

66.2 KB Created: 2020-12-16 18:53:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f204ff4aa217758619005b851317d4e SHA-1: d417c41b2c3ce97c16776251c509cbaf8e38f6ba SHA-256: 23791d6e6db9b6c978c7bf7776a4a1901e15fec6f0d77233f084a641dd44841e
154 Risk Score

Malware Insights

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

This PDF file contains a malicious link that redirects to a known malicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL is the primary indicator of compromise, suggesting a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/strik?utm_term=sony+digital+photo+frame+dpf-d92
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wefemabeni/70347952977.pdf
    • https://s3.amazonaws.com/tojazudibumogab/52423397352.pdf
    • https://static1.squarespace.com/static/5fc5d7c15e8e827d42afc458/t/5fca6822cba3ec752948da0b/1607100451609/nexojaxat.pdf
    • https://s3.amazonaws.com/juzewojavomofew/rasaxibubane.pdf
    • https://static1.squarespace.com/static/5fce0851c6682d375c8cd6c4/t/5fd614f1267c8d0ace3d8dcf/1607865585566/robbery_bob_2_mod_apk_android_1.pdf
    • https://static1.squarespace.com/static/5fc4c837cd1e280355ed07ea/t/5fd14ceff09ee25c6a94c042/1607552242370/zagamisajed.pdf
    • https://static1.squarespace.com/static/5fc0f22ee5c7695ca99bddc9/t/5fc383ac2dd96f59185b2297/1606648750009/pobixolin.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd00a33fdc31513a103e3f/1606221988023/ira_green_book_1977.pdf
    • https://static1.squarespace.com/static/5fc1cdd0ec917750a3de3367/t/5fc385585147b14804a0374c/1606649177426/cat_in_the_hat_bow_template.pdf
    • https://s3.amazonaws.com/petuzutemixuvod/bhaskaracharya_mathematician_information.pdf
    • https://s3.amazonaws.com/jujojomojemiz/biohazard_4_pc_trainer_free.pdf
    • https://s3.amazonaws.com/fosawef/sophisticated_vocabulary_words.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfe4f64a3cc4058a4d754/1606221392618/amada_band_saw_manual.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_off0000c6cf.bin
dd7cf0592a8f18ec619c4b78b2bb0831370b0ee7d5b5398a292de4fc23cf75e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC6CF 5800 bytes
font_01_sfnt_off0000da7e.bin
80046c8d3cb286b0c76e9c263d4826bae234c0ddd36a766b879506c7ecd6be80
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7E 9836 bytes