Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfa2c643179deec3…

MALICIOUS

PDF

61.4 KB Created: 2020-12-18 02:28:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 8af2d65405193c2ef0f5427928604cad SHA-1: f7c59d1c94680c19a7e7835bc7c4bb263b0af110 SHA-256: cfa2c643179deec38883b1753110d228064fdfbd74b6a4a2ca8ab3b0f4030b7c
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The embedded URL and the ML classifier strongly suggest malicious intent. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'sound or light' speed, aligning with the malicious URL's query parameter.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/strik?utm_term=whats+faster+sound+or+light In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370778/normal_5f94033713abd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445866/normal_5fa921e024ea6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413573/normal_5fc7136f0c15e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489245/normal_5fb88c43e756d.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/tapexiw/metro_valencia_mapa.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/54511946286.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/keziretulapabimonukal.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/zejasuladoxanalozuve.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf54dcf8cdb769c6d9ab74/1606374630630/nowaferoxubesazugiz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc64e12a8793968642cefca/t/5fd1f900b1f69267715b5d71/1607596289150/30562446845.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcebdbc8618956c414e0ded/t/5fd6e6085488895576bf455d/1607919112302/jupekufasimajokuxum.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/general_knowledge_quiz_questions_and_answers_nepal.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/anatomy_for_the_artist_sarah_simblet_free_download.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_off0000b5d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5D7 5184 bytes
SHA-256: fe42e19724ea5dd6338bef63b9891e7913511ca56d89767f19bd46b07e7dfbcc
font_01_sfnt_off0000c77e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC77E 9768 bytes
SHA-256: bbedeaac88d8965734a0871927338337a65793c6b32c9601a90e099bebfbc703

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