Malicious PDF — malware analysis report

Static analysis result for SHA-256 65138624f6b46b2e…

MALICIOUS

PDF

62.1 KB Created: 2020-12-25 02:13:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a1d6d9af3db026d80a89c8fd1400a69 SHA-1: 7409dae9a6774712d151a972d2bce08726f44f51 SHA-256: 65138624f6b46b2e63efd2c848cfe3959aba23cc92ab57813e55867f762d839c
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL 'https://cctraff.ru/aws?utm_term=abyssinia+law+teaching+materials+pdf' is the primary indicator of malicious intent. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lure users to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/aws?utm_term=abyssinia+law+teaching+materials+pdf
    • https://cdn.sqhk.co/dejenuluzew/O0kgfih/phoenix_zoo_groupon_2019.pdf
    • https://cdn.sqhk.co/marixefe/SYFBewQ/88145984464.pdf
    • https://cdn.sqhk.co/masamiwe/Ywjjwa4/rapalagijigosikarojobego.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kovezodepugov/forensic_audit_report_sample_in_india.pdf
    • https://s3.amazonaws.com/wexoteluwag/reporter_news_live.pdf
    • https://s3.amazonaws.com/nigimul/essentials_of_teaching_academic_vocabulary.pdf
    • https://s3.amazonaws.com/rexogeguxosix/insurgency_sandstorm_size.pdf
    • https://s3.amazonaws.com/palikuvexake/android_show_modal_dialog.pdf
    • https://s3.amazonaws.com/zumezeviwakiz/6480010480.pdf
    • https://s3.amazonaws.com/besafefaf/59855078220.pdf
    • https://s3.amazonaws.com/divelatoxa/retasojajabapatoliwumaj.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_off0000b6b3.bin
5489d3b3f3573b25097e001d861e2478829279b09392ec45ceca6e8dfb115fb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB6B3 5892 bytes
font_01_sfnt_off0000caa7.bin
8fd81cbdec1a204f5d712bd1ac402e5d1b4a888d99b007c22b37af37c63463d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA7 9648 bytes

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