Malicious PDF — malware analysis report

Static analysis result for SHA-256 49b4c609992e9ffe…

MALICIOUS

PDF

75.9 KB Created: 2021-04-02 17:01:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 531a4a16cf922f98a14db0746ec332f6 SHA-1: 6f40eafff93384dd6c9eb9fac2ef22e668e7835b SHA-256: 49b4c609992e9ffe94f1ff723f23969757806b86ac6203203d7829a623c6ef84
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links pointing to disposable hosting services, a common tactic for distributing phishing content or malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites, likely as part of a phishing campaign or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://jumiwimov.ru/strik?utm_term=swann+8+channel+4+camera+security+system+reviews PDF link annotation
    • https://nidukonijeso.weebly.com/uploads/1/3/1/3/131381088/aa7a56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403823/normal_601db4044d88b.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/3WjjjdC/pimuzudi.pdfIn PDF document text
    • https://cdn.sqhk.co/ronuwimo/hdnJzRr/scientific_calculator_online_ti-_84_download.pdfIn PDF document text
    • https://kupifima.weebly.com/uploads/1/3/0/7/130775493/pejanegu.pdfIn PDF document text
    • https://cdn.sqhk.co/berirenike/iijaoke/1004120035.pdfIn PDF document text
    • https://xasukibumit.weebly.com/uploads/1/3/4/7/134749231/gutosafela-tawagox-didelejavuxuz.pdfIn PDF document text
    • https://feropozu.weebly.com/uploads/1/3/1/4/131454035/9109093.pdfIn PDF document text
    • http://cabinetsop.xyz/sagiwoxobanujajorudaglw6y1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448357/normal_5ff6a82333b45.pdfIn PDF document text
    • https://jakoxizejibak.weebly.com/uploads/1/3/4/3/134348863/1127414.pdfIn PDF document text
    • https://ranefegol.weebly.com/uploads/1/3/4/4/134498511/5016008dc71.pdfIn PDF document text
    • https://dofuzubakav.weebly.com/uploads/1/3/1/6/131606612/zanajo-modaparolo.pdfIn PDF document text
    • https://kufudazasa.weebly.com/uploads/1/3/4/6/134626120/wirakapadi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449615/normal_5fcd4386f3749.pdfIn PDF document text
    • http://korecos.ru/list_of_trig_integralsm9bgg.pdfIn PDF document text
    • https://cdn.sqhk.co/foxuninulini/a7chb3M/xanamafelijifaxef.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/liwafo/sapna_chaudhary_song_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/arduino_mega_pinout_spreadsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/cover_letter_financial_reporting_analyst.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/biomass_power_plant_process.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/chemex_ottomatic_manual.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_off0000e9e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E3 5680 bytes
SHA-256: a5b3cc9069691ddbe8bee3d203a6bd498891d394e46d81e01563411eacbc5f64
font_01_sfnt_off0000fd2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2D 10732 bytes
SHA-256: e8b6493c9e27ad66bb4feb69f66f39b40ff99e497d2a3765b707ebb383c55bb6