Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a319f9dd9a5883a…

MALICIOUS

PDF

76.5 KB Created: 2021-02-08 09:28:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 42f02cf52ffe93a0f8fae7445250dc77 SHA-1: e77ba785fb6f7aed483bfdd41d5eb0ee48841642 SHA-256: 1a319f9dd9a5883aef2b9da18a57792a4fc7710f198c0eb6ce6e01d0071ab551
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by heuristics as a link farm designed for malicious purposes. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via these links. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jottigo.ru/aws?utm_term=biriyani+movie+songs++isaimini PDF link annotation
    • http://luminar2-download.xyz/english_grammar_book_filetypekjrw8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485699/normal_601fbb761a7d2.pdfIn PDF document text
    • http://alkim.xyz/705352604649w87h.pdfIn PDF document text
    • http://ledy66.net/pokixo317c.pdfIn PDF document text
    • http://ultra0.space/16294708810rday9.pdfIn PDF document text
    • http://eslife.pro/android_app_update_pendingvsqri.pdfIn PDF document text
    • https://silorofolukut.weebly.com/uploads/1/3/4/2/134265947/luzivur.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391954/normal_6008fccdb9797.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sufapanizesemot.epizy.com/tuwubodogoz.pdfIn PDF document text
    • http://bibalaluroxute.epizy.com/74307989754.pdfIn PDF document text
    • http://fipegaz.epizy.com/is_null_or_empty_crystal_reports.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_off0000ecff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFF 5184 bytes
SHA-256: 8ffd600f59ae481b2e91f77b3f9e234ea3e25b005f81bcfd2e80e50442677d8f
font_01_sfnt_off0000fe9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9D 11352 bytes
SHA-256: 4acc00aa1d438303ef8f63154541ca83da20f337d146053c67422b741efc4953

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