Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceb732c865c074f9…

MALICIOUS

PDF

76.6 KB Created: 2020-12-20 06:19:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 15b1383705b92150765a5a647a63eda3 SHA-1: 1f96af4ba605addc6db6a18b36977592c0d98d4b SHA-256: ceb732c865c074f9618c13918fbcd3f2577aea4d3aa226efd814cab1ea1503c8
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are to domains associated with link farms and phishing attempts, as indicated by the 'PDF_SEO_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' heuristics. The ClamAV detection further confirms its malicious nature. The primary attack vector appears to be directing users to malicious URLs, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffnew.ru/strik?utm_term=la+cuarta+dimension+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377902/normal_5fbb936b26275.pdfIn PDF document text
    • https://kejedavozeve.weebly.com/uploads/1/3/1/4/131483662/cf0807c10.pdfIn PDF document text
    • https://kusonanozeko.weebly.com/uploads/1/3/0/7/130775507/sapodazob.pdfIn PDF document text
    • https://kapebuzuzevasa.weebly.com/uploads/1/3/4/5/134587117/9786377.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/fefurorobumi/collective_noun_worksheets_grade_5.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/vanguard_voo_etf_fact_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1542af1c-120b-47eb-9eb0-6a319c21c421/guide_ffxv_franais.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/79212799255.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d900d26ff1194f736c6f/t/5fc8259b094cf7617db57530/1606952348126/word_link_game_play_online.pdfIn PDF document text
    • https://s3.amazonaws.com/tagorarib/teradata_dba_interview_questions_and_answers.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_off0000edf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF2 5212 bytes
SHA-256: 0d8e46bbb97072aa1af68f41d44ff6015383565de1faae075cff5545f03edd83
font_01_sfnt_off0000ff97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF97 11360 bytes
SHA-256: de57c7f229d5b4024fbacf2650ff4cb2263b892753f0eaa19ea97d596be40244

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