Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec23fe8f67ecea5a…

MALICIOUS

PDF

67.5 KB Created: 2020-12-04 17:03:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 51070a2aa35a5dddcfa2164148146e3d SHA-1: 30b973db60c4630e8d5e1b40721404efbcfd68c2 SHA-256: ec23fe8f67ecea5af4241e7ded5f49c40fbf3be44c717c2261e8de0530c7d387
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://traffine.ru/123?utm_term=big+ole+freak+instrumental+samples+what+song'. This indicates the document's primary purpose is to lure the user to this malicious site. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffine.ru/123?utm_term=big+ole+freak+instrumental+samples+what+song In PDF document text
    • https://static.s123-cdn-static.com/uploads/4369496/normal_5fc9f21935b66.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/gofilafixu/pensacola_public_library_jobs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b32f4729-4833-4eb9-badf-81c3851183c5/jeketo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe02d17acac6192a8718aa/1606288082326/kozekazepuvofijeje.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/seta_bursary_application_form_2020.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d6ed3398ff75154711b3/t/5fc850a5d32d012678f5c385/1606963369295/puzzle_bobble_ps4_uk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc509327848ba205d335311/t/5fc910780d5cd67f79006426/1607012472611/pimutisunokuboj.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/aprender_ingles_para_nios.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/zolenu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2be09d7c-de79-447e-9274-4e98ff2c55d0/rokuwi.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_off0000c95b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC95B 5520 bytes
SHA-256: b061bbea26e1976d2176ea2cf77685999df4fc90f862c399fdf99e39f971fb5a
font_01_sfnt_off0000dc13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC13 10980 bytes
SHA-256: 59e1cd2da1a319d7a7a8162ae1c8f140b95eefe5c57a682c3adf855aadb995a7