Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8e33436ef8c0cb6…

MALICIOUS

PDF

69.2 KB Created: 2020-12-19 06:21:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: c4b32b66421fe8bf06518dae72feb7de SHA-1: bce21f31c4109df82855410d6bf1e178f1df1ed5 SHA-256: b8e33436ef8c0cb690f79395f714ea3ce2495d6d2322508ae97cc30b584ff426
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://traffmen.ru/strik?utm_term=field+hockey+goalie+gear'. This URL is the primary indicator of malicious intent, suggesting the document is designed to lure users to a compromised or malicious site. The ML classifier and ClamAV also strongly indicate maliciousness.

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://traffmen.ru/strik?utm_term=field+hockey+goalie+gear In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366057/normal_5f86f5af2306c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406482/normal_5f9b08fd18844.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469623/normal_5fcc458bae333.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_5f9f1029d2c07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384642/normal_5fb7b55c96835.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418970/normal_5fa6ea75d6eab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/naruto_shippuden_senki_apk_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/convert_dictionary_to_json_format.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/formica_calacatta_marble_gloss.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3d0288139af0376575e17/t/5fcf3d2d3fa051062b434b77/1607417142216/peloton_compatible_heart_rate_monitor_apple_watch.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e925ea4a794d56451110/t/5fc2ed02e6d49a06bbf3e364/1606610180592/movie_review_format_for_students.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_off0000ceae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEAE 5144 bytes
SHA-256: 940a7bf72ac697035c9afbe4289572f2befa16b55fd66303494aeaf0413b18c5
font_01_sfnt_off0000e034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE034 11532 bytes
SHA-256: dd02ec585b9933c6bfc21afbf2c337809d2e1b16519b843b166caaa22a55d00d

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