Malicious PDF — malware analysis report

Static analysis result for SHA-256 51e250528a260184…

MALICIOUS

PDF

85.9 KB Created: 2021-01-06 15:22:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 0172ffde039102fbca37959a8e0bb8d8 SHA-1: f7457fa927f514946bddc95830b9487cff5de2ce SHA-256: 51e250528a2601841010af0d894e326c368781564aab10dadc5c1ce57e8d8a71
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/aws?utm_term=expression+of+interest+job+letter+template'. This indicates the document's primary purpose is to direct users to potentially harmful content. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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=expression+of+interest+job+letter+template In PDF document text
    • https://cdn-cms.f-static.net/uploads/4490917/normal_5fbc97c6558f4.pdfIn PDF document text
    • https://cdn.sqhk.co/tinipuded/u7FZjjB/best_east_front_game.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2d179cf-ea7e-4e2e-bab5-b290aa3588e6/gumazizulexebajirasinupuk.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/xovipexuranonojuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fd1f4c5-89e0-4fd5-adaa-4310ae297ab4/how_to_change_your_background_on_google_docs.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/backup_photos_and_videos_from_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8efb2b0-2be7-4087-99e2-3ac3363d5bed/5775017733.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/fuwiragirobusa.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/81889822628.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e555a61a-bfd0-445c-bd7e-6af4d51ebb21/94631233295.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/graphing_log_and_exponential_functions_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/71696691586.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/293f5f60-6a0e-4ecf-9f5d-d08da7270931/iata_book.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11324 5288 bytes
SHA-256: 7474fc16b1fa4c3d36798c123402d0b6c585480675983b00738466f3ba81de0c
font_01_sfnt_off0001250b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1250B 11036 bytes
SHA-256: 998904a1123b74d1079d0d437f863ce29bf3f60d4acea1e51f845c3d29da7ae6

Open this report in the interactive analyzer, or submit your own file for analysis.