Malicious PDF — malware analysis report

Static analysis result for SHA-256 83e4924f3b9a1850…

MALICIOUS

PDF

73.9 KB Created: 2021-01-06 23:39:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d71f3bb997cd5dd5a62b69e3e4f93ee6 SHA-1: be0e34769f03235e019b66ff48abfb5e9c15e59c SHA-256: 83e4924f3b9a1850a2a2306e558e31cb396773c527da09bc5b20da412b1c5b63
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms and phishing campaigns. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically identified as a phishing trojan. The embedded URLs suggest the document is designed to redirect users to potentially harmful sites, likely for credential harvesting or further malware delivery.

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://trafffi.ru/123?utm_term=sony+tv+remote+setup+code PDF link annotation
    • https://cdn.sqhk.co/jawutuwek/OZifgj0/zoxafokulatowerexaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379846/normal_5f8c2b6c5e8ca.pdfIn PDF document text
    • https://cdn.sqhk.co/jasamomedam/NmiWsjd/xaxexefuwelujixarupun.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzosexiwugu/hhBhgfd/buwozifivanumoweb.pdfIn PDF document text
    • https://cdn.sqhk.co/jojipimuve/hjgchh7/joker_ringtone_2020_audio.pdfIn PDF document text
    • https://ledekatibawe.weebly.com/uploads/1/3/4/2/134265754/04356527.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419204/normal_5fb8e11c66706.pdfIn PDF document text
    • https://cdn.sqhk.co/vopufepivipe/eGjggd9/90472505145.pdfIn PDF document text
    • https://cdn.sqhk.co/dawezizupata/hbijjt4/home_assistant_zigbee2mqtt_addon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470696/normal_5fce8069732f9.pdfIn PDF document text
    • https://cdn.sqhk.co/jerizukop/jjijpje/95688608596.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366647/normal_5fb3c68589395.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376375/normal_5fb421b15cf25.pdfIn PDF document text
    • https://cdn.sqhk.co/kurafuso/ghpwhh0/wugonexosojuvaze.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/faduxodiwo/22939585024.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_off0000e3df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DF 5244 bytes
SHA-256: c0674c9845245c81e9e30f7ef2711a8ee1123eee6533fc7328386286a7d17743
font_01_sfnt_off0000f5ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AE 10920 bytes
SHA-256: f8e8740cfb01f57acce803656c9b5606b3b7aa3d446925cfe107f88dd4e6db0c

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