Malicious PDF — malware analysis report

Static analysis result for SHA-256 c74e6a677001268c…

MALICIOUS

PDF

64.8 KB Created: 2020-11-14 18:59:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: ef1fc659c9fe3b06555b8898c00b52d0 SHA-1: 76ad3e4eac3dc7607bb4ebed96507ce781a3bd6e SHA-256: c74e6a677001268ccaa69be8f8353f88807b924127bbae04a752590527169696
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to redirect users to potentially harmful sites. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the presence of numerous external URLs indicates a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffe.ru/123?utm_term=city+of+macclenny+dump+hours PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380539/normal_5f8d7d5f1fb1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386605/normal_5f917b5dc6832.pdfIn PDF document text
    • https://tamilavijunaw.weebly.com/uploads/1/3/4/5/134506647/kisakuzu_ruzelepitoru.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/f5f8225a576c.pdfIn PDF document text
    • https://bulavanu.weebly.com/uploads/1/3/4/3/134341337/zikisofetufo.pdfIn PDF document text
    • https://favurujovonelod.weebly.com/uploads/1/3/4/4/134435517/840e93.pdfIn PDF document text
    • https://kutowovazamil.weebly.com/uploads/1/3/4/3/134362820/4884308.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422918/normal_5f9be9f3f20af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371246/normal_5f970b6635c51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418000/normal_5f95ff2cb3dc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383567/normal_5f9cf6a334d79.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/goneduzum/acetic_acid_80_safety_data_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/inside_out_psychology_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/jojugefikemu.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_off0000bedf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEDF 5404 bytes
SHA-256: 75d8ee07cbdc6b872be5bb2954d1fa7ccb59708ab62085d8de7c46912a91f624
font_01_sfnt_off0000d115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD115 11048 bytes
SHA-256: 4ec41d2953e11fc5a30c90006a5eae4112997292bebf0d1ff75f16d1b7724500

Open this report in the interactive analyzer, or submit your own file for analysis.