Malicious PDF — malware analysis report

Static analysis result for SHA-256 b35a99fba9e7d2db…

MALICIOUS

PDF

69.1 KB Created: 2020-12-22 19:17:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f6a32593aee9f04235f5246c42686e63 SHA-1: 2aa4fe9a43de366e4fd3b93c5a44933fe8459b8c SHA-256: b35a99fba9e7d2db24c7b53e274b50cd59488e9d38238d4529fa8521c331cb9c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, suggesting a link farm or phishing attempt. The primary URL, 'https://trafffi.ru/strik?utm_term=luke+combs+song+hurricane+lyrics', is likely used to redirect users to malicious content or a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/strik?utm_term=luke+combs+song+hurricane+lyrics PDF link annotation
    • https://judadumoxa.weebly.com/uploads/1/3/4/7/134718892/dejebojaxa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408701/normal_5fd3318235d7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490949/normal_5fd0e0e8c5f0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495385/normal_5fccd2ed858c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374519/normal_5f998acc6bc98.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388279/normal_5fc99627dfbbc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383475/normal_5fe0ceca0ef94.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/2c6435da-93fd-4c64-8f65-958ceae645b9/abg_practice_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60d988c1-9e33-4327-ac6d-713a12467c90/talagatuvuv.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/26629439690.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/39083288773.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/39085252232.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/transformers_beast_mode_characters.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/sitefitef.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/viva_video_editor_for_windows_8.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_off0000d0cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0CC 5460 bytes
SHA-256: b94c5eaaabc1401e58e1ac2105694aa4601180d57420651be43179ea752119e1
font_01_sfnt_off0000e341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE341 10684 bytes
SHA-256: c6ae7a9d111947f88f1b09ca0f9ab770458e51a7834109432105bc3727b092b2

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