Malicious PDF — malware analysis report

Static analysis result for SHA-256 531cf41f68edc346…

MALICIOUS

PDF

76.5 KB Created: 2020-12-23 16:06:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e817e1617dfa2d3863a9e13c0c02ecc7 SHA-1: 92edf1d1c3b09c9303c9fa3ffe6066b3207debaa SHA-256: 531cf41f68edc346d855389531f175a9baca9f33c4864dc8387e435dead950c0
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffmen.ru'. This indicates an attempt to lure the user to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffmen.ru/strik?utm_term=back+wars+game+mod+apk In PDF document text
    • https://static.s123-cdn-static.com/uploads/4459320/normal_5fdd8f0336e10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388619/normal_5f9f598810cbf.pdfIn PDF document text
    • https://cdn.sqhk.co/sononipo/BFARjjU/kavopuvumus.pdfIn PDF document text
    • https://cdn.sqhk.co/wezopexa/hae7Tih/ikea_bed_sheets_australia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379043/normal_5f8b9e57b441f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379959/normal_5f9bc59f20be3.pdfIn PDF document text
    • https://cdn.sqhk.co/zowipitilo/jbibuPY/zonajowazoparimapa.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/wexukufedepim/android_emulator_pc_games.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/31404897600.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/workplace_compliance_services_ny.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/monthly_pocket_calendar_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6951c016-3ce6-4e3e-b6f6-601c695f9979/napanevawolovukirakezifex.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/vufaviboluzuravagetu.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_off0000edda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDA 5568 bytes
SHA-256: 7676dc63cdc8e5cd71cef517f390d878d8977ccdd42b753128f386e3116b70d6
font_01_sfnt_off000100cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CB 10724 bytes
SHA-256: 4bb2ff1a424f2cddd1aa5569f792b654240c941d06809a92f355f03ae96cc194

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